Trimble Outdoors 132RS User Manual

DSM™ 132/132RS Receiver  
User Guide  
Version 1.73  
Revision A  
Part Number 50979-00-ENG  
December 2003  
DO NOT ALLOW LIMITATIONS ON DURATION OR  
THE EXCLUSION OF AN IMPLIED WARRANTY, SO  
THE ABOVE LIMITATION MAY NOT APPLY TO YOU.  
– Connect the equipment into an outlet on a circuit  
different from that to which the receiver is connected.  
– Consult the dealer or an experienced radio/TV  
technician for help.  
TRIMBLE NAVIGATION LIMITED IS NOT  
RESPONSIBLE FOR THE OPERATION OR FAILURE OF  
OPERATION OF GPS SATELLITES OR THE  
AVAILABILITY OF GPS SATELLITE SIGNALS.  
Changes and modifications not expressly approved by  
the manufacturer or registrant of this equipment can  
void your authority to operate this equipment under  
Federal Communications Commission rules.  
Limitation of Liability  
TRIMBLES ENTIRE LIABILITY UNDER ANY  
PROVISION HEREIN SHALL BE LIMITED TO THE  
AMOUNT PAID BY YOU FOR THE PRODUCT OR  
SOFTWARE LICENSE. TO THE MAXIMUM EXTENT  
PERMITTED BY APPLICABLE LAW, IN NO EVENT  
SHALL TRIMBLE OR ITS SUPPLIERS BE LIABLE FOR  
ANY INDIRECT, SPECIAL, INCIDENTAL OR  
CONSEQUENTIAL DAMAGES WHATSOEVER UNDER  
ANY CIRCUMSTANCE OR LEGAL THEORY RELATING  
IN ANY WAY TO THE PRODUCTS, SOFTWARE AND  
ACCOMPANYING DOCUMENTATION AND  
MATERIALS, (INCLUDING, WITHOUT LIMITATION,  
DAMAGES FOR LOSS OF BUSINESS PROFITS,  
BUSINESS INTERRUPTION, LOSS OF BUSINESS  
INFORMATION, OR ANY OTHER PECUNIARY LOSS),  
REGARDLESS WHETHER TRIMBLE HAS BEEN  
ADVISED OF THE POSSIBILITY OF ANY SUCH LOSS  
AND REGARDLESS OF THE COURSE OF DEALING  
WHICH DEVELOPS OR HAS DEVELOPED BETWEEN  
YOU AND TRIMBLE. BECAUSE SOME STATES AND  
JURISDICTIONS DO NOT ALLOW THE EXCLUSION OR  
LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR  
INCIDENTAL DAMAGES, THE ABOVE LIMITATION  
MAY NOT APPLY TO YOU.  
NOTE: THE ABOVE LIMITED WARRANTY  
PROVISIONS MAY NOT APPLY TO PRODUCTS OR  
SOFTWARE PURCHASED IN THE EUROPEAN UNION.  
PLEASE CONTACT YOUR TRIMBLE DEALER FOR  
APPLICABLE WARRANTY INFORMATION.  
Notices  
Class B Statement – Notice to Users. This equipment  
has been tested and found to comply with the limits for a  
Class B digital device, pursuant to Part 15 of the FCC  
rules. These limits are designed to provide reasonable  
protection against harmful interference in a residential  
installation. This equipment generates, uses, and can  
radiate radio frequency energy and, if not installed and  
used in accordance with the instructions, may cause  
harmful interference to radio communication. However,  
there is no guarantee that interference will not occur in a  
particular installation. If this equipment does cause  
harmful interference to radio or television reception,  
which can be determined by turning the equipment off  
and on, the user is encouraged to try to correct the  
interference by one or more of the following measures:  
– Reorient or relocate the receiving antenna.  
– Increase the separation between the equipment and  
the receiver.  
1
Welcome . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
The DSM 132 Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
Standard features . . . . . . . . . . . . . . . . . . . . . . . . . . . 16  
Standard Features DSM 132RS . . . . . . . . . . . . . . . . . . . 17  
Receiver enhancements . . . . . . . . . . . . . . . . . . . . . . . 17  
Receiver input / output . . . . . . . . . . . . . . . . . . . . . . . 18  
Differential GPS (DGPS) . . . . . . . . . . . . . . . . . . . . . . . . . . 19  
Sources of GPS error. . . . . . . . . . . . . . . . . . . . . . . . . 19  
Generating DGPS Corrections . . . . . . . . . . . . . . . . . . . . 24  
3
Installing the Receiver. . . . . . . . . . . . . . . . . . . . 25  
System Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26  
Optional extras (if ordered) . . . . . . . . . . . . . . . . . . . . . 27  
Mounting the Receiver and Antenna . . . . . . . . . . . . . . . . . . . . 27  
Choosing a location . . . . . . . . . . . . . . . . . . . . . . . . . 27  
DSM 132/132RS Receiver User Guide  
v
Contents  
The receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28  
4
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36  
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36  
Installing AgRemote . . . . . . . . . . . . . . . . . . . . . . . . . 37  
The AgRemote Menu System. . . . . . . . . . . . . . . . . . . . . . . . 40  
Using AgRemote . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40  
The AgRemote keys . . . . . . . . . . . . . . . . . . . . . . . . . 41  
Navigating the Menus and Screens . . . . . . . . . . . . . . . . . . . . . 42  
Menu System Fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44  
Display-only fields . . . . . . . . . . . . . . . . . . . . . . . . . . 44  
Multiple-choice fields . . . . . . . . . . . . . . . . . . . . . . . . 44  
5
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54  
Display Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54  
Configuring the Communication Ports . . . . . . . . . . . . . . . . . . . 57  
Configuring input / output communication . . . . . . . . . . . . . 59  
Configuring Differential GPS. . . . . . . . . . . . . . . . . . . . . . . . 62  
Paid Subscription Services . . . . . . . . . . . . . . . . . . . . . . . . . 63  
vi DSM 132/132RS Receiver User Guide  
Contents  
OmniSTAR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65  
WAAS/EGNOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69  
Configuring Other DGPS Corrections . . . . . . . . . . . . . . . . . . . 73  
Configuring DGPS Base Station . . . . . . . . . . . . . . . . . . . . . . 73  
Base location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75  
6
A
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86  
Problems and Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . 86  
Troubleshooting Flowcharts . . . . . . . . . . . . . . . . . . . . . . . . 92  
System Hardware and Power Troubleshooting Flowchart . . . . . . . . . 93  
GPS Reception Troubleshooting Flowchart . . . . . . . . . . . . . . . . 94  
OmniSTAR Troubleshooting Flowchart . . . . . . . . . . . . . . . . . . 95  
Thales Troubleshooting Flowchart . . . . . . . . . . . . . . . . . . . . . 96  
DSM 132/132RS Receiver User Guide vii  
Contents  
B
C
NMEA-0183 Message Structure . . . . . . . . . . . . . . . . . . . . . 104  
Symbols and delimiters . . . . . . . . . . . . . . . . . . . . . . 105  
Checksum values. . . . . . . . . . . . . . . . . . . . . . . . . . 105  
Field formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106  
Talker ID codes. . . . . . . . . . . . . . . . . . . . . . . . . . . 106  
Latitude and longitude values . . . . . . . . . . . . . . . . . . . 107  
Time values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107  
Reading NMEA string format . . . . . . . . . . . . . . . . . . . 107  
NMEA Message Summary . . . . . . . . . . . . . . . . . . . . . . . . 107  
GGA (GPS Fix Data) . . . . . . . . . . . . . . . . . . . . . . . . . . . 109  
GLL (Position Data) . . . . . . . . . . . . . . . . . . . . . . . . . . . .111  
GRS (GPS Range Residuals) . . . . . . . . . . . . . . . . . . . . . . . .112  
GSA (GPS DOP and Active Satellites) . . . . . . . . . . . . . . . . . . .113  
GST (GPS PRN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114  
GSV (GPS Satellites in View) . . . . . . . . . . . . . . . . . . . . . . .115  
MSS (Beacon Receiver Signal Status) . . . . . . . . . . . . . . . . . . .116  
RMC (Recommended Minimum Specific GPS Data) . . . . . . . . . . .117  
VTG (Course Over Ground and Ground Speed) . . . . . . . . . . . . . .119  
XTE (Cross-Track Error) . . . . . . . . . . . . . . . . . . . . . . . . . 120  
ZDA (Time and Date). . . . . . . . . . . . . . . . . . . . . . . . . . . 120  
PTNLEV Proprietary (Event Marker). . . . . . . . . . . . . . . . . . . 121  
PTNLID Proprietary (Trimble Receiver ID) . . . . . . . . . . . . . . . 122  
PTNLDG Proprietary (Trimble DGPS Receiver Status) . . . . . . . . . 123  
PTNL,GGK (Time, Position, Position Type, and DOP) . . . . . . . . . 124  
viii DSM 132/132RS Receiver User Guide  
Contents  
PTNLSM Proprietary (RTCM Special) . . . . . . . . . . . . . . . . . . 125  
D
E
Combined Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132  
GPS Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133  
Beacon Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133  
L-Band Satellite Differential Correction Receiver . . . . . . . . . . . . 134  
Receiver Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . 134  
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137  
DSM 132/132RS Receiver User Guide ix  
Contents  
x
DSM 132/132RS Receiver User Guide  
C H A P T E R  
1
Welcome  
1
This manual describes how to install and configure the DSM™ 132  
receiver. It provides guidelines for using the AgRemote utility to view  
and configure receiver DGPS and communication operating  
parameters. The manual also provides guidelines for connecting the  
receiver to a variety of external devices, information about NMEA  
messages supported by the receiver, and pin-out diagrams for data  
cable connections.  
Even if you have used other Global Positioning System (GPS)  
products before, Trimble recommends that you spend some time  
reading this manual to learn about the special features of this product.  
If you are not familiar with GPS, go to the Trimble website  
(www.trimble.com) for an interactive look at Trimble and GPS.  
1.1  
Related Information  
Other sources of related information are:  
Release notes – the release notes describe new features of the  
product, information that is not included in the manuals, and  
any changes to the manuals. You can download release notes  
from the Trimble website.  
DSM 132/132RS Receiver User Guide 11  
     
1
Welcome  
1.2  
Technical Assistance  
If you have a problem and cannot find the information you need in the  
product documentation, contact your local dealer. Alternatively, do  
one of the following:  
Request technical support using the Trimble website at  
1.3  
Your Comments  
Your feedback about the supporting documentation helps us to  
improve it with each revision. E-mail your comments to  
[email protected].If you have a problem and cannot find  
the information you need in the product documentation, contact your  
local Trimble Reseller.  
12 DSM 132/132RS Receiver User Guide  
       
C H A P T E R  
2
2
In this chapter:  
Introduction  
The DSM 132 Receiver  
Differential GPS (DGPS)  
DSM 132/132RS Receiver User Guide 13  
   
2
Overview  
2.1  
Introduction  
This chapter describes the DSM 132 receiver and gives an overview of  
GPS, DGPS, and related information. For details of the receiver  
physical specifications, see Appendix E, Specifications.  
2.2  
The DSM 132 Receiver  
The DSM 132 receiver combines high-performance GPS reception  
with a DGPS-capable receiver in a lightweight, durable, waterproof  
housing. The DSM 132 receiver also contains technology which  
enables WAAS/EGNOS, OmniSTAR, Thales, or Coast Guard Beacon  
(MSK) real-time differential capabilities. See Figure 2.1.  
When the connections described above are not available, the  
DSM 132RS receiver has the capability to be used as a base station for  
the generation of Differential GPS (DGPS) corrections. A radio link is  
needed to broadcast the corrections to rover DSM 132 units.  
14 DSM 132/132RS Receiver User Guide  
     
Overview  
2
Figure 2.1  
DSM 132 receiver  
As part of a marine construction or survey system, the receiver  
provides submeter (less than 3.28 ft) precision whenever differential  
corrections are applied. You can use a 1 PPS (pulse per second) strobe  
signal to synchronize time for logging event markers when you are  
using external instruments.  
You can use the receiver with a variety of marine survey equipment,  
including office software such as HYDROpro™, which also interfaces  
with echo sounders and magnetometers, for use on waterborne  
projects.  
DSM 132/132RS Receiver User Guide 15  
     
2
Overview  
22.1  
Standard features  
A standard DSM 132 system provides:  
12-channel L1 1575.42 MHz (C/A code) GPS receiver with  
carrier phase filtering  
Combined L1 GPS, Satellite differential, and beacon antenna  
L-Band satellite differential correction capable receiver  
Note – For the DSM 132 to operate with the L-Band  
corrections, the client must subscribe to a satellite differential  
service.  
Dual-channel digital medium frequency beacon receiver  
EVEREST™ technology for multipath rejection (firmware  
version 1.73 and greater)  
Differential correction input from other RTCM SC-104 sources  
WAAS (U.S.A.) and EGNOS (Europe) differential capable  
Sub-meter differential accuracy  
2 line, 16 character liquid crystal display  
4 button keyboard  
1, 2, 5, and 10 Hz (10 positions per second) output messages  
Operation manual  
15m antenna cable  
GPS receiver to PC cable  
Magnetic mount for antenna  
Two programmable RS-232 serial ports:  
NMEA-0183 output  
RTCM SC-104 input  
TSIP I/O  
Baud Rate 2400-38400  
1 PPS (pulse per second) output  
16 DSM 132/132RS Receiver User Guide  
     
Overview  
2
22.2  
Standard Features DSM 132RS  
A DSM 132RS system provides all the features of the DSM 132  
except:  
the 30 meter antenna cable is supplied  
the RTCM SC-104 output (base station corrections) is available  
22.3  
Receiver enhancements  
Table 2.1 lists the receiver options that you can purchase with the  
DSM 132 receiver.  
Table 2.1  
Receiver enhancement options  
Option (PN)  
Description  
Use  
Differential  
Base Station  
(36429-30)  
Outputs RTCM differential  
corrections. (This option is installed receiver to broadcast corrections for  
in the DSM 132RS.)  
If a radio link is attached, enables the  
use by other DGPS receivers. This  
provides submeter positioning.  
EVEREST  
Technology  
(36429-20)  
Reduces multipath interference.  
(This option is installed in receivers  
with firmware version 1.73 and  
greater.)  
Improves DGPS receiver accuracy.  
RTS/CTS  
Provides hardware flow control  
When attached to third-party modems,  
provides RTS/CTS flow control for  
correct operation.  
Flow Control  
Negotiation  
(36429-50)  
DSM 132/132RS Receiver User Guide 17  
                   
2
Overview  
22.4  
Receiver input / output  
The DSM 132 standard power/data cable (PN 30945) connects to the  
receiver ports to supply power. It also enables the following data  
exchanges:  
ASCII, TSIP, and RTCM input from an external device.  
The receiver is able to receive ASCII data from an external  
device, convert this data into an NMEA message, and export  
that message to another device. TSIP command packets  
configure and monitor GPS and DGPS parameters. The receiver  
is also able to accept RTCM data from an external device, such  
as a pager.  
RTCM, TSIP, and NMEA to an external device.  
The receiver is able to output RTCM in base station mode  
(requires the base station option). When you are using an  
external radio, it can also receive DGPS corrections. TSIP is  
input/output when communicating with HYDROpro. NMEA is  
output when the receiver is exporting GPS position information  
to an external device or navigation software.  
For more information on the NMEA (National Marine  
Electronics Association) and RTCM (Radio Technical  
Commission for Maritime Services) communication standard  
for GPS receivers, go to the following websites:  
1 PPS output  
To synchronize timing between external instruments and the  
receiver’s internal clock, either one of the connection ports  
outputs a strobe signal at 1 PPS (pulse per second). To output  
this signal, the receiver must be tracking satellites and  
computing GPS positions.  
18 DSM 132/132RS Receiver User Guide  
             
Overview  
2
2.3  
Differential GPS (DGPS)  
The DSM 132 receiver uses DGPS to achieve high accuracy. You can  
have a DSM 132RS (this is called the reference or base station)  
located at a known point. This receiver is used to determine GPS  
signal measurement errors. One or more mobile receivers (called  
rovers) collect data at unknown locations, while remaining within  
range of the reference station. The reference station broadcasts  
correction values, which are applied to the receiver positions. In this  
way, errors common to the reference and rover receivers are corrected.  
For more information about DGPS and the different DGPS signals  
available, visit the Trimble website  
23.1  
Sources of GPS error  
Autonomous (GPS only) horizontal accuracy for the Trimble  
DSM 132 receiver ranges from approximately 2–9 meters (about 6–  
30 ft).  
The errors that cause this reduced accuracy are produced mainly by  
atmospheric conditions, multipath error (that is, GPS signals bouncing  
off objects before reaching the antenna), and electronic or GPS  
frequency noise interference.  
DGPS removes most of the errors caused by atmospheric conditions,  
errors which are further minimized by the advanced design of the  
DSM 132 receiver. For more information, see the section on Error  
Correction on the Trimble website at  
DSM 132/132RS Receiver User Guide 19  
                   
2
Overview  
23.2  
DGPS accuracy  
Submeter accuracy from the DSM 132 receiver utilizing differential  
correction is best achieved under the conditions described in  
Table 2.2.  
Table 2.2  
DGPS accuracy  
Condition  
Optimum Description  
Value  
Number of  
satellites used  
> 5  
To calculate a 3D position (latitude and longitude, altitude,  
and time), four or more satellites must be visible.  
To calculate a 2D position (latitude and longitude, and time),  
three or more satellites must be visible.  
The number of visible satellites constantly changes and is  
typically in the range 5–9. The DSM 132 receiver can track  
up to 12 satellites simultaneously.  
Note – To see when the maximum number of GPS satellites are  
available, use the Quickplan utility and a current ephemeris  
(satellite history) file. Both files are available free from:  
Maximum  
PDOP  
< 4  
Position Dilution of Precision (PDOP) is a unitless, computed  
measurement of the geometry of satellites above the  
receiver’s current location.  
Note – In some agricultural applications that do not require high  
accuracy, a maximum PDOP of 12 or more can be used.  
Signal to Noise  
Ratio  
> 6  
Signal-to-Noise ratio (SNR) is a measure of the satellite  
signal strength against electrical background noise. A high  
SNR gives better accuracy.  
Minimum  
Elevation  
> 7.5  
Satellite that are low on the horizon typically produce weak  
and noisy signals and are more difficult for the receiver to  
track. Satellites below the minimum elevation angle are not  
tracked.  
Multipath  
environment  
Low  
Multipath errors are caused when GPS signals are reflected  
off nearby objects and reach the receiver by two or more  
different paths. The receiver incorporates the EVEREST  
multipath rejection option.  
RTCM-  
compatible  
corrections  
These corrections are broadcast from a DSM 132RS or  
equivalent reference station.  
20 DSM 132/132RS Receiver User Guide  
                           
Overview  
2
23.3  
Position Output  
Geographic data obtained from different sources must be referenced to  
the same datum, ellipsoid, and coordinate format. Different formats  
provide different coordinate values for any geographic location. In  
North America, the datums NAD-27 and NAD-83 are commonly used  
in marine applications.  
The DSM 132 receiver outputs position coordinates in several datums  
and ellipsoids depending on the source of DGPS being used. See  
Table 2.3.  
Table 2.3  
DGPS source  
Differential Source  
Datum  
Ellipsoid  
WGS-84  
WGS-841  
None – Autonomous mode  
OmniSTAR 3 North American Beams  
OmniSTAR Rest of World Beams  
Thales Beams  
2
NAD-83  
3
ITRF  
GRS-80  
GRS-80  
WGS-84  
ITRF  
WAAS Beams  
WGS-84  
1World Geodetic System 1984. Datum and ellipsoid.  
2North American Datum 1983. Equivalent to WGS-84.  
3International Terrestrial Reference Frame. Contact the DGPS provider for details.  
For more information, go to the National Geodetic Survey website:  
Note – To convert GPS positions in the NAD-83 datum to background  
maps for the old NAD-27 datum, use the conversion program  
Corpscon. This is available free from the Topographic Engineering  
DSM 132/132RS Receiver User Guide 21  
         
2
Overview  
Position Output Format  
The DSM 132 receiver outputs positions in Degrees, Minutes, and  
Decimal Minutes (DDD°MM.m'). This is the NMEA (National  
Marine Electronic Association) standard format and is commonly  
used worldwide for data transfer between electronic equipment.  
23.4  
Receiving beacon DGPS  
To obtain free radiobeacon differential signals, the DSM 132 receiver  
uses dual-channel, fully-automatic beacon receiver electronics and  
tracks broadcasts that conform to the IALA (International Association  
of Lighthouse Authorities) Standard. When you use beacon DGPS, the  
receiver selects the closest of the 10 most powerful radiobeacons in  
the vicinity. You can configure the receiver to search for particular  
station frequencies, or use the EZ beacon feature to select local  
beacons.  
The receiver continuously monitors the integrity of the data received  
from the differential radiobeacons. If it finds unacceptable errors in  
the data stream, the receiver automatically switches to a different  
radiobeacon, if one is available.  
Radiobeacon signal reception is generally not affected by:  
hilly or mountainous terrain  
tree canopy  
location of the receiver inside a canyon (the signal reception  
depends on the proximity of the receiver to the transmitter)  
Radiobeacon signal reception is affected to varying degrees, by:  
natural “noise”, such as lightning  
human-made “noise”, such as alternators, electric fan motors,  
radio speakers, and high voltage power lines  
Sky wave interference with ground wave  
22 DSM 132/132RS Receiver User Guide  
         
Overview  
2
During darkness, when the beacon tower is more than  
240–480 kilometers (150–300 miles) from the receiver, the sky  
wave beacon signal may be reflected off the ionosphere. This  
causes interference with the ground wave beacon signal. Self-  
jamming at night may be a problem with stronger beacon  
stations.  
Geographic de-correlation  
This phenomenon causes radiobeacon signal accuracy to  
decrease as the distance between the beacon tower and the base  
station increases. Ionospheric conditions can affect accuracy by  
as much as 1 meter (3 feet) for every 100 km (60 miles).  
23.5  
Receiving satellite DGPS  
The DSM 132 receiver supports subscription-based OmniSTAR, and  
Thales, satellite differential technology. Contact the service provider  
for service activation or an encrypted activation passcode.  
Note – For the DSM 132 to operate with these corrections, you must  
subscribe to one of these services. The service provider may set  
geographic limits on the use of its service.  
In addition, the WAAS/EGNOS service is available free in North  
America and Europe. For more information, see Configuring  
Differential GPS, page 62, or go to the following websites:  
OmniSTAR (www.omnistar.com)  
DSM 132/132RS Receiver User Guide 23  
                   
2
Overview  
23.6  
Receiving DGPS Corrections from Other Sources  
The DSM 132 can also receive RTCM SC-104 corrections from  
sources such as:  
AM/FM carrier services  
Your own radio data link (from a DSM 132RS reference  
station)  
23.7  
Generating DGPS Corrections  
In locations where MSK beacons or WAAS/EGNOS are not available,  
or if you decide not to subscribe to L-band correction services, you  
can install your own reference station and broadcast your own  
corrections. The DSM 132RS or the firmware option for the DSM 132  
allow corrections to be generated. A radio data link (UHF, VHF, and  
so on) is required to transmit the corrections.  
24 DSM 132/132RS Receiver User Guide  
   
C H A P T E R  
3
In this chapter:  
System Components  
Mounting the Receiver and Antenna  
Routing and Connecting the Antenna Cable  
Connecting to an External Device  
Laptop Computer  
DSM 132/132RS Receiver User Guide 25  
 
3
Installing the Receiver  
3.4  
System Components  
Check that you have received all the appropriate components for the  
DSM 132 system that you have purchased. If any containers or  
components are damaged, immediately notify the shipping carrier, or  
Trimble Construction Division at the address given in the front of this  
manual. Components for each system are listed in the following  
tables.  
Table 3.4  
DSM 132 Receiver (PN 49086-00)  
P/N Description  
Qty  
1
33302-33  
33580-00  
12920-00  
21555  
132 Receiver  
1
132 Antenna  
1
Magnetic Mount for Antenna  
15 m (50 ft) Ruggedized Antenna Cable  
Power/data Cable  
1
1
30945  
1
50984-00  
DSM Support CD (manuals, utilities)  
Table 3.5  
DSM 132RS Receiver (PN 49086-10)  
Qty  
1
P/N  
Description  
33302-33  
36654-00  
11820-10  
30945  
DSM 132RS Receiver  
Compact L1 Antenna  
1
1
30 m (10 ft) Antenna Cable (N-N)  
Power/data cable  
1
1
50984-00  
DSM Support CD (manuals, utilities)  
26 DSM 132/132RS Receiver User Guide  
   
Installing the Receiver  
3
34.1  
Optional extras (if ordered)  
Table 3.6  
DSM 132 Receiver options  
Description  
Qty  
1
P/N  
36429-30  
36429-20  
36429-50  
DGPS Base station Capability  
EVEREST Multipath Rejection Technology  
RTS/CTS Flow Control  
1
1
3.5  
Mounting the Receiver and Antenna  
Mount the antenna in a clear position free from obstructions.  
For some short term installations you can place the antenna upright  
with the magnetic base on a flat metal surface.  
35.1  
Choosing a location  
When choosing a location, consider the following:  
Do mount the antenna:  
on a flat surface along the centerline of the vessel.  
in any convenient location within 15 meters (50 feet) of the  
GPS receiver.  
at the highest point of the vessel with no metal surfaces  
blocking its view of the sky. Trimble recommends that you  
position the antenna on the top of a mast or pole.  
in such a way that it is not damaged when you sail under a  
bridge.  
Do not mount the antenna:  
close to stays, electrical cables, metal masts, CB radio antennas,  
cellular phone antennas, air-conditioning units, active TV  
antennas, or machine accessory lights.  
DSM 132/132RS Receiver User Guide 27  
           
3
Installing the Receiver  
near transmitting antennas, radar arrays, or satellite  
communication equipment.  
near areas that experience high vibration, excessive heat,  
electrical interference, and strong magnetic fields.  
35.2  
The receiver  
To mount the DSM 132 receiver:  
4. Drill four holes in the mounting surface. Use the slotted holes in  
the mounting brackets as a template.  
5. Use screws to secure the brackets to the mounting surface.  
Note – If you use machine screws, tap the mounting holes to  
fasten the receiver to the mounting surface. Trimble  
recommends that you use 8-32 UNF socket head cap screws.  
Alternatively, use self-tapping screws.  
30.1  
The antenna  
Mount the GPS antenna so that it has a clear view of the sky even  
when the vessel is rolling. Ensure that it is safe from damage during  
normal operation; that is, mount the antenna solidly for the worst-case  
pitch, roll, and heave of the vessel.  
The base of the rover antenna has a 1" UNC female thread. A steel  
pipe with a male 1" UNC thread is a suitable pole mounting for the  
antenna.  
28 DSM 132/132RS Receiver User Guide  
       
Installing the Receiver  
3
30.2  
Environmental conditions  
Although the receiver has a waterproof housing, you should install it  
in a dry location. To improve the performance and long-term  
reliability of the receiver, avoid exposure to extreme environmental  
conditions, including:  
water  
excessive heat (> 65°C or 149°F)  
excessive cold (< –20°C or –4°F)  
high vibration  
corrosive fluids and gases  
30.3  
Electrical interference  
As far as possible, when you install the receiver and antenna, you  
should avoid placing them near sources of electrical and magnetic  
noise, such as:  
gasoline engines (spark plugs)  
PC monitor screens  
alternators, generators, or magnetos  
electric motors (blower fans)  
equipment with DC-to-AC converters  
switching power supplies  
radars  
active marine TV antennas  
CB radio antennas  
cellular phone antennas  
machine accessory lights  
DSM 132/132RS Receiver User Guide 29  
         
3
Installing the Receiver  
3.1  
Routing and Connecting the Antenna Cable  
A 15 m (50 ft) antenna cable (PN 21555) is included with the receiver.  
One end is pre-terminated with a straight connector. The other end of  
the antenna cable is not terminated, so that it can be routed in the  
vessel through a minimal-sized hole (gland). If excess cable remains,  
the cable can be cut to size before fitting the right-angle TNC  
connector. See Figure 3.2.  
Antenna cable  
PN 21555  
Figure 3.2  
Antenna cable connections  
30 DSM 132/132RS Receiver User Guide  
     
Installing the Receiver  
3
When routing the antenna cable, avoid the following hazards:  
sharp objects  
kinks in the cable  
hot surfaces (exhaust manifolds or stacks)  
rotating or moving machinery parts  
sharp or abrasive surfaces  
door and window jams  
corrosive fluids or gases  
After routing the cable, connect it to the receiver. Use tie-wraps to  
secure the cable at several points along the route. One tie-wrap is  
required to secure the cable near the base of the antenna. This provides  
strain relief for the antenna cable connection.  
When the cable is secured, coil any slack. Secure the coil with a  
tie-wrap and tuck it into a safe place.  
Tip – Use the tape (coax tape seal) that is provided with the antenna to  
seal the antenna connector at the antenna. The tape prevents moisture  
from entering the connection.  
B
DSM 132/132RS Receiver User Guide 31  
 
3
Installing the Receiver  
3.2  
Connecting to an External Device  
After installing the receiver and antenna, connect and route the  
power/data cable (PN 30945). The receiver can be powered by a  
vehicle or by a customer-supplied 10–32 VDC power source.  
Figure 3.3 shows how to connect the receiver to an external device  
using the 5.5 m (18 ft) standard power/data cable.  
9–pin port  
Antenna cable  
DSM 132 receiver  
A
1
   2
S
Cable 30945  
Power  
ve  
+
Ground  
–ve  
Red  
Connect cable 30945  
to Port A  
Black  
-
Figure 3.3  
Standard power/data cable connections  
32 DSM 132/132RS Receiver User Guide  
   
Installing the Receiver  
3
Plug the:  
right-angle connector into the receiver  
straight 9-pin connector into the external device (such as a PC  
running HYDROpro software).  
When routing the cable from the receiver to the external device, avoid  
the hazards listed on page 31.  
When the cable is safely routed and connected to the receiver, use  
tie-wraps to secure it at several points, particularly near the base of the  
receiver to prevent straining the connection. Coil any slack cable,  
secure it with a tie-wrap, and tuck it into a safe place.  
DSM 132/132RS Receiver User Guide 33  
3
Installing the Receiver  
3.3  
Laptop Computer  
Figure 3.4 shows how to connect the receiver power/data cable to a  
laptop computer.  
Laptop computer  
9–pin port  
DSM132 Receiver  
A
1
   2
S
Cable 30945  
Power  
+ve  
Red  
Ground  
–ve  
Connect cable 30945  
to Port A  
Black  
Figure 3.4  
Connecting the receiver to a laptop computer  
34 DSM 132/132RS Receiver User Guide  
     
C H A P T E R  
4
4
Introduction  
Front Panel  
The AgRemote Menu System  
Using AgRemote  
Navigating the Menus and Screens  
Menu System Fields  
The Home Screen  
Updating the Firmware  
DSM 132/132RS Receiver User Guide 35  
   
4
Getting Started  
4.1  
Introduction  
This chapter describes how to set up and begin using the DSM 132  
receiver.  
4.2  
Front Panel  
The DSM 132 receiver includes an integrated display and keypad for  
accessing the internal menu system. Use the menus and screens in this  
system to configure the receiver settings and review receiver status. To  
view the entire menu system, see Appendix D, Navigation Maps. You  
can also access the menu system using office computer software, such  
as AgRemote.  
Figure 4.1 shows the LCD display and keypad on the DSM 132  
receiver front panel.  
LCD display  
Enter  
Up  
Keys  
DSM 132 receiver front panel  
Down  
Right  
Figure 4.1  
36 DSM 132/132RS Receiver User Guide  
     
Getting Started  
4
42.1  
Installing AgRemote  
AgRemote requires Microsoft® Windows® 95, 98, Me,  
Windows 2000, or XP.  
To install the latest version of AgRemote:  
1. Download the AgRemote software from the Trimble website  
2. Follow the prompts provided by the File Download wizard:  
a. Select Save this program to disk.  
b. Click OK.  
Save the AgRemote file to My Documents, or to another folder  
of your choice on the hard drive of your computer. Click Save.  
The download takes about a minute, depending on your Internet  
connection speed.  
3. Select the folder where you saved the AgRemote file.  
4. Double-click the downloaded file to start installing AgRemote.  
5. In the InstallShield dialog, click Yes.  
6. Follow the instructions provided by the installation wizard.  
When completed, click Finish.  
DSM 132/132RS Receiver User Guide 37  
 
4
Getting Started  
To use AgRemote:  
1. Connect the receiver to the serial port of the office computer, as  
shown in Figure 4.2.  
Laptop computer  
9–pin port  
DSM 132 Receiver  
A
1
   2
S
Cable 30945  
Power +ve  
Red  
Ground -ve  
Black  
Connect cable 30945  
to Port A  
Figure 4.2  
Connecting the receiver to an office computer  
38 DSM 132/132RS Receiver User Guide  
 
Getting Started  
4
2. From the  
menu, select Programs / AgRemote / AgRemote.  
3. When the program starts, select File / Connect.  
AgRemote establishes communication with the receiver and  
displays the Home screen of the AgGPS menu system, as shown  
in Figure 4.3.  
Home screen  
S
V
D 3D  
08 DOP02  
S
N
S 1554.4970 /10  
Down  
AgRemote window and navigation keys.  
Left  
Esc  
Up  
Right  
Enter  
Figure 4.3  
4. Navigate to the required screen. Use the display to configure the  
communication ports, differential correction source, and/or  
AgGPS® lightbar communication settings. For a map showing  
the full menu system, see Appendix D, Navigation Maps. For  
more information, see Chapter 5, Configuring the Receiver.  
DSM 132/132RS Receiver User Guide 39  
   
4
Getting Started  
4.1  
Use the commands provided by the AgGPS menu system to:  
monitor the receiver status  
change the receiver configuration  
This section describes the menu system and the setting display  
options. Chapter 5, Configuring the Receiver, describes how to  
4.2  
Using AgRemote  
To configure and monitor the receiver:  
1. Connect the receiver to the office computer running AgRemote.  
See page 38.  
2. Switch on the receiver.  
3. Click  
, then select Programs / AgRemote / AgRemote.  
When the Home screen appears, you can press 1 or 3 to access  
other screens in the AgGPS menu system.  
Srch í00 DOP00  
S 1556.0000 Srch  
Tip – Use the navigation maps in Appendix D, Navigation Maps as a  
reference when navigating the DSM 132 menu system.  
B
40 DSM 132/132RS Receiver User Guide  
     
Getting Started  
4
40.1  
The AgRemote keys  
The actions of the AgRemote keys depend on whether a menu or  
screen is displayed. Table 4.1 describes the key actions.  
Table 4.1  
Key actions  
Key  
Action if menu displayed  
Action if screen displayed  
Return to the top of the menu when an From the Home screen, change Satellite  
Exit screen appears after the last  
DGPS source mode.  
screen in a menu.  
From the Lock Display Cfg screen, display  
the Enter Password screen.  
From other screens, perform an action  
associated with that screen.  
Move down a menu level.  
Move downward through the screens in a  
menu.  
Display the first screen from a lower  
level menu.  
Move downward through the list of options in  
multiple-choice fields.  
Move up a menu level.  
Move upward through the screens in a  
menu.  
Move upward through the list of options in  
multiple-choice fields.  
Move horizontally through the upper-  
and lower-level menus.  
Select the next alphanumeric or  
multiple-choice field on a screen. When  
alphanumeric or multiple-choice fields are  
Move from the last upper-level menu to  
the Home screen.  
available, the  
symbol appears in the  
ꢄꢄ  
corner of the screen.  
Move to the next letter or digit of a field.  
Move up one menu level.  
Ultimately, return to the Home screen.  
Move from a screen to the screen’s menu.  
Press again to return to the previous level.  
Press again to return to the Home screen.  
DSM 132/132RS Receiver User Guide 41  
     
4
Getting Started  
4.1  
Navigating the Menus and Screens  
screen to view the receiver status or to change a configuration setting.  
The top level of the AgRemote menu system consists of the Home,  
Field Operations, Status, and Configuration menus. Each of these has  
one or more lower level menus (sub-menus), which you can use to  
access screens for selecting options, viewing status information, and  
entering data. For a map showing the full menu system, see  
Appendix D, Navigation Maps.  
When you are using the receiver front panel keypad to navigate the  
menu system, press 2+1 simultaneously to move to the previous  
menu. Press and hold (or press repeatedly) 2+1 simultaneously to  
return to the Home screen.  
42 DSM 132/132RS Receiver User Guide  
   
Getting Started  
4
Figure 4.4 shows the structure of a typical sub-menu, such as Display  
Options.  
Home  
Top-level menu screen  
Sub-menu screen  
1
2
Display  
Options  
1
1
1
2
Units  
Clear  
Contrast  
Screens  
1
1
1
2
2
Lock  
Memory  
Display  
2
2
Update  
Receiver  
Language  
1
2
2
Exit screen indicates  
end of the menu  
Exit  
Figure 4.4  
Typical menu structure  
Press 2 or 1 to move between screens.  
Within screens, select options, view receiver status, or enter data.  
When Ðappears in a screen, press 4 to perform the action specified  
for that screen.  
DSM 132/132RS Receiver User Guide 43  
   
4
Getting Started  
4.2  
Menu System Fields  
Fields in a screen contain status information or configuration settings.  
Information or settings can appear in fields that are:  
display-only  
multiple-choice  
alpha, numeric, or alphanumeric  
42.1  
Display-only fields  
A display-only field shows status information and other data that is  
automatically generated by the receiver or acquired from satellite  
signals. You cannot edit this field. Examples include fields that display  
the DGPS data on the Home screen and the fields in the screen in  
Figure 4.5, which show details of the current receiver options.  
Receiver option details field  
Figure 4.5  
Example of a display-only field  
42.2  
Multiple-choice fields  
In a mulitple-choice field, you select one option from a list. Only one  
option can appear in the field at one time. Press 3 to select a  
multiple-choice field, the press 2 or 1 to move through the list.  
When the required option appears, press 4 to select it and save the  
changes.  
44 DSM 132/132RS Receiver User Guide  
         
Getting Started  
4
Examples include the two multiple-choice fields that appear in the EZ  
Sat DGPS Configuration screen (see Figure 4.6). These are the fields  
which list available satellite providers and satellite coverage beams.  
Service Provider field  
Satellite Coverage Beam field  
Figure 4.6  
Example of a multiple-choice field  
42.3  
Alpha, numeric, and alphanumeric fields  
In these fields, you can enter only letters (alpha screens), only  
numbers (numeric screens), or a combination of the two  
(alphanumeric screens):  
1. Press 3 to select the field and activate the cursor on the first  
letter or number.  
2. Press 1 or 2 to move through the list of letters or numbers  
until the required letter or number appears.  
3. Press 3 to move to the next place in the field.  
4. Repeat steps 2 and 3 to enter all required characters.  
5. Press 4 to save the changes.  
DSM 132/132RS Receiver User Guide 45  
     
4
Getting Started  
One example of a numeric field appears in the Satellite Freq screen. In  
this field, you manually enter the broadcast frequency of a satellite  
service provider. See Figure 4.7.  
Satellite Frequency field  
Figure 4.7  
Example of a numeric field  
4.1  
The Home Screen  
When you start AgRemote, or access the receiver using the AgGPS 70  
Remote Display and Logger, the Home screen appears. See Figure 4.8.  
GPS status indicators  
Srch í00 DOP00  
S 1556.0000 Srch  
Satellite DGPS indicators  
Figure 4.8  
Home screen  
You can leave this screen running during operation. It enables you to  
monitor the receiver status. To return to the Home screen after viewing  
other receiver menus and screens, press 5 one or more times.  
As the DSM 132 is a combined Beacon and Satellite DGPS receiver,  
the information that appears on the Home screen depends on how the  
receiver is configured.  
46 DSM 132/132RS Receiver User Guide  
       
Getting Started  
4
41.1  
Satellite DGPS mode  
In this manual, references to Satellite DGPS apply only to the  
DSM 132 receiver. When the receiver is in Beacon DGPS mode, a B,  
Beacon Searching, Beacon Tracking, or Beacon FFT message appears in the  
lower-left corner of the screen. To change between modes, press 4  
and hold for five seconds. To display satellite differential information,  
press 4 until an S appears in the lower left corner of the screen.  
41.2  
Satellite and WAAS/EGNOS DGPS mode  
The DSM 132 can receive Beacon, L-band, and WAAS/EGNOS  
DGPS signals. The Home screen indicates which mode the receiver is  
in for differential correction.  
Figure 4.9 explains the GPS status indicators that can appear on the  
first line of the Home screen display.  
D/3D í07 DOP03  
Current PDOP value  
Number of GPS satellite vehicles (SVs) being  
tracked  
Position Type  
Figure 4.9  
GPS status  
DSM 132/132RS Receiver User Guide 47  
     
4
Getting Started  
Table 4.2 explains the indicators that can appear in the Position Type  
field.  
Table 4.2  
Position types  
Description  
Display  
SRCH  
TRCK  
G/2D  
Searching for satellites.  
Tracking satellites.  
Outputting 2-dimensional autonomous positions.  
Outputting 3-dimensional autonomous positions.  
Outputting 2-dimensional differential positions.  
Outputting 3-dimensional differential positions.  
G/3D  
D/2D  
D/3D  
Note – The “/” symbol in the position type spins when the receiver is  
operating correctly.  
Satellite DGPS mode status indicators  
When the receiver is in Satellite mode, the second line of the Home  
screen displays the status indicators shown in Figure 4.10.  
S 1556.2550 ÷ø10  
Signal-to-noise ratio of DGPS  
signal, see Table 4.4  
Frequency for tracked DGPS satellite. Available  
frequencies vary according to your location and  
DGPS service provider.  
Receiver is using Satellite DGPS corrections.  
Figure 4.10 Satellite DGPS mode status indicators  
48 DSM 132/132RS Receiver User Guide  
                               
Getting Started  
4
Table 4.3 shows the possible satellite differential mode indicators.  
Table 4.3  
Indicator  
Satellite differential mode status indicators  
Description  
S ####.### S/N ##  
S SRCH ###.##  
S TRCK ####.##  
Operating in Satellite Differential mode.  
Searching for Satellite Differential signal.  
Tracking satellite without acquiring signal lock.  
Table 4.4 explains the signal-to-noise ratio values for both Satellite  
and WAAS/EGNOS DGPS modes.  
Table 4.4  
Signal-to-noise values  
Value  
Below 4  
Description  
Unusable  
Fair  
>8  
Excellent  
WAAS/EGNOS DGPS mode status indicators  
When the receiver is in WAAS/EGNOS DGPS mode, the second line  
of the Home screen displays the status indicators shown in  
Figure 4.11.  
WAAS 122 ÷ø07  
Signal-to-noise ratio of DGPS signal, see  
Table 4.4  
WAAS satellite ID  
Receiver is using WAAS/EGNOS corrections.  
Figure 4.11 WAAS DGPS mode status indicators  
DSM 132/132RS Receiver User Guide 49  
         
4
Getting Started  
41.3  
Beacon DGPS mode  
When in Beacon DGPS mode, the Home screen displays “B” (Beacon  
DGPS) in the lower left corner. Figure 4.12 explains the status  
indicators that appear on the first line of the Home screen display  
when the receiver is in this mode.  
B A-R 310.0 ÷ø15  
The beacon signal-to-noise  
ratio. S/N values range from 0  
to 30. High numbers are best.  
Above 6 is acceptable.  
The beacon frequency. Frequency varies  
depending upon the beacon used.  
The beacon operating mode.  
Indicates the receiver is using beacon DGPS.  
Figure 4.12 Beacon DGPS status  
Table 4.5 describes messages that can appear when the receiver is in  
Beacon DGPS mode.  
Table 4.5  
Beacon DGPS operating mode messages  
Message  
Description  
B
The receiver is operating in Beacon mode.  
Beacon Searching  
Beacon Tracking  
The receiver is searching for beacon signals.  
The receiver is tracking beacon signals and is  
attempting to gain lock.  
Beacon Idle  
Beacon DGPS is not active.  
50 DSM 132/132RS Receiver User Guide  
     
Getting Started  
4
Table 4.5  
Beacon DGPS operating mode messages (continued)  
Description  
Message  
Beacon FFT  
The receiver is looking for a beacon across the  
signal spectrum.  
Beacon Disabled  
Beacon DGPS is disabled in the receiver. You will  
need to change configuration settings to enable  
Beacon DGPS.  
External RTCM  
Battery is Low  
Differential corrections are being provided by an  
external source, through port A or port B.  
This warning replaces the DGPS information when  
the input voltage is low.  
4.2  
Updating the Firmware  
To update the receiver firmware when a new version is released:  
1. Download the upgrade files.  
2. Install the FlashLoader100 utility.  
3. Connect the receiver to an office computer.  
4. Upgrade the firmware from the office computer, using the  
upgrade files.  
For full details of how to do this, refer to the Release Notes provided  
with your receiver firmware.  
If you have problems when you update the firmware, see Appendix A,  
Troubleshooting. For further assistance, contact your local Trimble  
Reseller.  
DSM 132/132RS Receiver User Guide 51  
   
4
Getting Started  
52 DSM 132/132RS Receiver User Guide  
C H A P T E R  
5
Introduction  
Display Options  
Configuring the Communication Ports  
Configuring Differential GPS  
Paid Subscription Services  
WAAS/EGNOS  
Configuring Beacon DGPS  
Configuring Other DGPS Corrections  
Configuring DGPS Base Station  
DSM 132/132RS Receiver User Guide 53  
   
5
Configuring the Receiver  
5.1  
Introduction  
The Display Options, Satellite Differential Source, and Port  
Communication parameters must be specific to your particular use, so  
they are not preset. You only need to configure the receiver once, as  
the settings you choose are saved to permanent memory.  
Tip – Refer to Appendix D, Navigation Maps while navigating the  
DSM 132 menu system.  
B
To change the receiver configuration settings, connect the receiver to  
AgRemote. For more information, see Getting Started, page 35  
The following sections describe how to change the receiver settings.  
5.2  
Display Options  
Use the Display Options menu to control how information is displayed  
in the screens that you can access from the Field Operations, Status  
and Configuration menus.  
To view the Display Options menu:  
From the Home screen (see page 46), press 2:  
54 DSM 132/132RS Receiver User Guide  
           
Configuring the Receiver  
5
Setting the language  
To change the language used for display:  
1. Navigate to the Language screen:  
2. Press 3 to select the Language field.  
3. Press 1 or 2 until the required language is displayed.  
4. Press 4 to select it and save the changes.  
5. Press 5 to return to the Display Options menu.  
The screen automatically displays the selected language.  
Setting the units  
The Units screen displays U.S., Metric, or Nautical units in the screens  
that you access from the Field Operation, Status, and Configuration  
menus.  
Note – This setting does not affect GPS position data output.  
1. Navigate to the Units screen:  
2. Press 3 to select the Units field.  
3. Press 1 or 2 until the required unit is displayed.  
4. Press 4 to select it and save the changes.  
5. Press 5 to return to the Display Options menu.  
6. Press 5 again to return to the Home screen.  
DSM 132/132RS Receiver User Guide 55  
     
5
Configuring the Receiver  
Locking the Configuration menus  
To prevent unauthorized changes to the configuration, you can lock  
the Configuration menus:  
1. Navigate to the Lock Display Cfg screen.  
2. Press 4 to display the Enter Password screen. The cursor is  
active on the first digit:  
3. Use the last five numbers of the receiver serial number as the  
password (“passcode”).  
Press 1 or 2 until the first digit of the serial number appears.  
4. Press 3 to select the next digit. Repeat step 3 until all five  
digits are entered.  
5. Press 4 to save the changes.  
The Valid Password message appears, and the Configuration  
menus are no longer displayed when you navigate the menus.  
If the message Invalid Password appears, enter the password again.  
Tip – When the Configuration menus are locked, you can view most  
Configuration menu settings from the Status menus.  
B
C
To unlock the Configuration menus, repeat the above procedure.  
Clearing battery-backed RAM  
Warning – When you select the Clear BB Ram option, any changes that  
you have made in the Configuration menus are deleted and cannot be  
restored.  
56 DSM 132/132RS Receiver User Guide  
       
Configuring the Receiver  
5
Use the Clear BB RAM screen to remove all configuration settings in  
the receiver memory (RAM) and return the receiver to its factory  
default configuration settings:  
To delete battery-backed memory:  
1. Navigate to the Clear BB RAM screen:  
2. Press 3 to activate the cursor.  
3. Press 1 or 2 to select Yes.  
4. Press 4 to clear the configuration settings.  
5.1  
Configuring the Communication Ports  
The DSM 132 receiver has two serial ports. The receiver can  
communicate with two devices simultaneously through these ports. To  
do this, it uses the standard power/data cable (PN 30945).  
Configure the communication ports to ensure that the receiver outputs  
the correct GPS position data type, for the hardware device or  
software program that is connected to the receiver.  
Note – As both ports are configured identically, this section describes  
only Port A.  
To display the Port A Config menu:  
1. From the Home screen, press 3 until the Configuration menu  
appears.  
2. Press 2 to display the Guidance Config menu.  
3. Press 3 until the Port A Config menu appears:  
Port A Config  
Press v to Enter  
4. Press 2 to move through the screens as required.  
DSM 132/132RS Receiver User Guide 57  
       
5
Configuring the Receiver  
The following section describes how to configure the appropriate Port  
A Config screens. The menu for Port B is identical. Figure 5.13 shows  
the menu that you use to access the configuration screens.  
Configuration  
2
(Guidance Config 3 Lightbar Config 3 ) Func Key Config 3  
Log Config (RDL) 3 GPS Config 3  
Port A  
Config  
DGPS Config 3  
2
2
1
1
Port A  
In/Out  
NMEA 3  
Messages  
1
2
Port A Out  
RTS/CTS  
NMEA/TSIP  
Output Rate  
1
2
1
2
NMEA 1  
Messages  
1 Hz NMEA  
1
2
1
2
NMEA 2  
Messages  
Exit  
1
2
Figure 5.13 Port A Config menu  
58 DSM 132/132RS Receiver User Guide  
 
Configuring the Receiver  
5
50.1  
Configuring input / output communication  
Configure the Port Input/Output communication settings for  
communicating with other external hardware devices, and software  
programs. Table 5.6 describes the input settings.  
Table 5.6  
Port input settings  
Setting  
None  
Description  
Inputs nothing to the receiver.  
TEXTB  
The receiver can accept ASCII data from an external device,  
such as a chlorophyll meter, on Port A, merge it with NMEA GPS  
data, and output the combined data on Port B. The incoming data  
must be limited to 66 ASCII characters and must be terminated  
by a carriage return and line feed (hex characters 0x0D 0x0A).  
The NMEA string outputs as $PTNLAG001,<up to 66 ASCII  
characters>*<2 digit checksum><CR><LF>. For the receiver to  
output the combined NMEA string, NMEA must be selected as  
the output protocol on Port B.  
TEXTA  
RTCM  
TSIP  
See the description for the TEXTB setting. TEXTA outputs on  
Port A, not Port B.  
The receiver can accept RTCM data from an external DGPS  
device, such as an FM pager, or DSM 132RS and radio data link.  
The receiver can accept or output TSIP data packets from the  
port when using the optional AgRemote program or HYDROpro  
software.  
LBAR  
Not used for marine applications.  
The default values for the other port settings are:  
Port A  
Port B  
Baud rate  
In  
RTCM 9600  
Out  
NMEA 4800  
Data bits  
Parity  
8
8
None  
1
None  
1
Stop bits  
DSM 132/132RS Receiver User Guide 59  
   
5
Configuring the Receiver  
When setting the baud rate, note the following:  
If you are using 19.2 k or 38.4 k, the input rate must match the  
output rate.  
If Port A is operating at 19.2 k, Port B can operate at 1200,  
2400, 9600, or 19.2k (not 38.4 k).  
If Port B is operating at 38.4k, Port A can operate at 1200, 2400,  
9600 and 38.4k (not 19.2k).  
To change the input or output settings:  
1. From the Port A Config screen, press 2 until the Port-A  
Input/Output screen appears:  
åæ I RTCM 9600  
8N1 0 NMEA 4800  
2. Press 3 to activate the cursor.  
3. Press 1 or 2 to change the value.  
4. Press 3.  
5. Repeat steps 3 and 4 until you have set all the required values.  
6. Press 4 to save all the changes.  
7. Press 2 to move to the next screen.  
Selecting NMEA messages for output  
Use this screen to select the NMEA messages output from the current  
port. Only upper-case NMEA message types are output. The default  
messages are GGA, GSA, VTG, and RMC.  
60 DSM 132/132RS Receiver User Guide  
   
Configuring the Receiver  
5
To select the NMEA messages for output:  
1. From the Port A Config menu, press 2 until the NMEA1  
screen appears:  
åæ NMEA1 GGA gll  
grs GSA gst gsv  
2. Press 3 to activate the cursor on the first NMEA message  
type.  
3. Press 1 or 2 until the NMEA message type appears in upper  
case.  
5. Repeat steps 4 and 5 until all the message types that you want to  
output appear in upper-case.  
6. Press 4 to save the changes.  
7. Repeat this operation as required in the other NMEA screens.  
For detailed information about the content and structure of NMEA  
messages, see Appendix C, NMEA-0183 Messages.  
Port output rate  
Use the Message Rate screen to vary the NMEA and TSIP output rate.  
The default setting is 01 (1 Hz, or 1 position per second).  
You can select faster output rates, such as 2, 5, or 10 positions per  
second.  
Note – Select ASAP if you want the output rate to be the same as the  
output rate selected on the Position Rate screen under the GPS Config  
menu.  
DSM 132/132RS Receiver User Guide 61  
         
5
Configuring the Receiver  
To set the NMEA / TSIP message output rate:  
1. From the Port A Config menu, press 2 until the Message Rate  
screen appears:  
åæNMEA out 01 s  
TSIP out 01 s  
2. To set the NMEA output rate, press 3 twice to place the active  
cursor on the second digit of the NMEA line.  
3. Press:  
a. 2 to set the output rate to ASAP.  
b. 1 to increase the output rate by one second. Press this key  
as often as necessary, to a maximum of 99 seconds.  
4. To set the TSIP output rate, press 3 twice to move the cursor  
to the second digit of the TSIP line. Repeat step 3.  
5. Press 4 to save the changes.  
5.1  
Configuring Differential GPS  
For the receiver to output GPS position coordinates of submeter  
accuracy, you must first select a differential signal from one of the  
following sources:  
WAAS/EGNOS – free service, limited availability  
The Wide Area Augmentation System (WAAS) augments GPS  
with additional signals for increasing the reliability, integrity,  
accuracy, and availability of GPS in the United States. EGNOS  
(European Geostationary Navigation Overlay System) is the  
European equivalent of WAAS.  
OmniSTAR – paid subscription, available worldwide  
Thales – paid subscription, available worldwide  
62 DSM 132/132RS Receiver User Guide  
       
Configuring the Receiver  
5
You can use one of these paid services as an alternative to  
WAAS/EGNOS. They both provide over-the-air DGPS  
activation.  
Other source of RTCM SC-104 corrections; for example, a  
DSM 132RS over a radio data link.  
For more information, see Differential GPS (DGPS), page 19.  
To use the differential signal from the selected provider:  
1. Configure the receiver.  
2. Activate the receiver.  
3. Enable the receiver.  
For details, see the following sections.  
To configure the receiver to receive signals from any provider:  
1. Navigate to the DGPS Config menu:  
2. Press 2.  
3. Follow the steps in the appropriate section below. Each section  
describes how to configure, activate, and enable the receiver for  
a particular provider.  
5.1  
Paid Subscription Services  
When you obtain a paid satellite subscription, contact the service  
provider for the correct satellite coverage beam for your geographic  
location.  
In the U.S. and Canada, contact:  
OmniSTAR at 1- 888-883-8476  
DSM 132/132RS Receiver User Guide 63  
       
5
Configuring the Receiver  
Thales-LandStar at 1-888-434-7757  
You will need to provide a serial number and user code:  
1. Navigate to the Serial number screen.  
Note the serial number here:  
2. Navigate to the Omni* or Thales Srv Info screen.  
Note the user code here:  
To configure the DGPS Source for the subscription service:  
1. Navigate to the DGPS Source screen.  
2. Press 3 to activate the cursor.  
3. Press 2 until Satellite Only appears:  
4. Press 4 to save the changes.  
5. Press 5 to return to the DGPS Config menu.  
To configure the provider name and the correct satellite coverage  
beam:  
1. From the DGPS Config menu, press 2 until the EZ Sat screen  
appears.  
Note – The EZ Sat screen includes the Coverage Beam field and  
the Geographic Location field.  
2. Press 3 to activate the cursor.  
64 DSM 132/132RS Receiver User Guide  
         
Configuring the Receiver  
5
3. Press 2 until the required provider appears (Omni* or Thales).  
4. Press 3 to move to the next field.  
5. Press 2 until the coverage beam for your location appears.  
6. Press 4 to save the changes.  
7. Press 5 to return to the DGPS Config menu.  
50.1  
OmniSTAR  
To activate OmniSTAR DGPS:  
1. Switch on the receiver and make sure it is configured for the  
correct satellite coverage beam.  
If you do not know the coverage beam for your location, contact  
OmniSTAR, see Paid Subscription Services, page 63.  
2. Contact OmniSTAR on 1-888-883-8476 (USA or Canada).  
Provide OmniSTAR with:  
your billing information  
user code  
satellite beam name  
OmniSTAR will activate the receiver. Activation can take  
5–30 minutes.  
3. Once the receiver is activated, the Home screen displays D/3D:  
DSM 132/132RS Receiver User Guide 65  
     
5
Configuring the Receiver  
If automatic activation fails, try to activate OmniSTAR DGPS  
manually, as described below. If you cannot activate the OmniSTAR  
differential service, contact your local Trimble Reseller.  
Activating OmniSTAR manually  
Note – If the receiver is activated automatically, this option is not  
If over-the-air activation fails, or if you want to activate the  
OmniSTAR differential service manually, obtain an activation code  
from OmniSTAR:  
1. Contact OmniSTAR for the activation code and satellite  
coverage beam for your location. See Paid Subscription  
Services, page 63. You will need to provide a serial number.  
Note the activation number here:  
Note the satellite coverage beam here:  
2. From the DGPS Config screen, press 2 until the Omni* screen  
appears:  
åæ Press Ð for  
3. Press 4 twice. In the screen that appears, the active cursor  
highlights the first digit.  
4. Press 1 or 2 to change the number.  
5. Press 3 to select the next digit.  
6. Repeat steps Step 4 and Step 5 to enter all 24 numbers.  
7. Press 4 to save the changes.  
8. Press 5 to return to the DGPS Config menu.  
66 DSM 132/132RS Receiver User Guide  
         
Configuring the Receiver  
5
Note – If you enter an incorrect code, try again using the correct  
numbers. An incorrect code has no effect on receiver operation.  
50.1  
Thales  
To activate Thales DGPS:  
1. Switch on the receiver and make sure it is configured for the  
correct satellite coverage beam.  
If you do no know the coverage beam for your location, contact  
Thales, see Paid Subscription Services, page 63.  
2. Contact Thales at 1-888-434-7757 (USA or Canada). Provide  
Thales with:  
your billing information  
user code  
satellite beam name  
Thales will activate the receiver. Activation can take 5–60  
minutes.  
3. Once the receiver is activated, the Home screen displays D/3D:  
D/3D ß07 DOP03  
S 1556.2550 ÷ø10  
DSM 132/132RS Receiver User Guide 67  
   
5
Configuring the Receiver  
Thales reference stations  
To manually select a Thales network reference station:  
1. From the DGPS Config screen, press 2 until the Thales Stn  
screen appears:  
a
åæ Th les Stns  
Use Network Stn  
2. Press 3 to activate the cursor.  
3. Press 2 until Use Manual Mode appears.  
4. Press 4 to save the changes.  
5. Press 2 until Thales Man Stns appears:  
a
åæTh les M n Stn  
a
a
565 No ccess  
6. Press 3 to activate the cursor.  
7. Press 2 until the correct station appears for the satellite beam  
you are using. Trimble strongly recommends the stations listed  
below.  
If you are using the  
satellite beam ...  
with this  
select this  
frequency ... reference station ...  
North American West  
North American Mountain  
North American East  
1556.255  
1554.350  
1553.345  
565  
555  
555  
Note – Before you can select a reference station, you must have  
a current subscription to the Thales DGPS service.  
8. Press 4 to save the changes.  
68 DSM 132/132RS Receiver User Guide  
   
Configuring the Receiver  
5
5.1  
WAAS/EGNOS  
WAAS/EGNOS is a free satellite-based DGPS service that is available  
only in North America (WAAS) or Europe (EGNOS). To use the  
WAAS/EGNOS DGPS signal, you must first configure the receiver.  
To configure the receiver to use WAAS/EGNOS DGPS:  
1. From the DGPS Config menu, press 2 until the DGPS Source  
screen appears.  
2. Press 3 to activate the cursor.  
3. Press 2 until WAAS/EGNOS ONLY appears:  
åæ DGPS Source  
WAAS/EGNOS ONLY  
4. Press 4 to save the changes.  
To enable the WAAS/EGNOS DGPS signal:  
1. Press 2 until the WAAS/EGNOS T2 Remap screen appears.  
2. Press 3 to activate the cursor.  
3. Press 2 until On appears:  
åæ WAAS/EGNOS  
a
T2 Rem p On  
4. Press 4 to save the changes.  
To enable WAAS reception in the field:  
1. Take the receiver outside. Make sure that it has a clear southeast  
and southwest view of the sky.  
2. Switch on the receiver.  
WAAS activation can take two or more minutes.  
DSM 132/132RS Receiver User Guide 69  
         
5
Configuring the Receiver  
3. Once activation succeeds, the Home screen displays D/3D:  
D/3D í07 DOP03  
WAAS 122 ÷ø04  
5.1  
Configuring Beacon DGPS  
DSM 132 receivers are configured by default to use WAAS/EGNOS  
in Auto Range DGPS mode. To change a DSM 132 receiver to  
Satellite DGPS mode, see page 66.  
Select the frequency of the channels to be used when receiving RTCM  
SC-104 broadcasts from radiobeacons:  
1. Navigate to the DGPS Source screen.  
2. If the screen does not display Beacon Only, press 3 to select  
the Data Source field. Then press 2 until Beacon Only  
appears.  
3. Press 4 to save the changes.  
4. Press 2 until the Beacon Mode screen appears:  
70 DSM 132/132RS Receiver User Guide  
   
Configuring the Receiver  
5
5. Press 3 to activate the cursor. Press 2 until the required  
beacon mode appears. See Table 5.7.  
Table 5.7  
Beacon modes  
Description  
Mode name  
Auto Range mode Reads the incoming RTCM SC-104 message  
stream and selects the two closest  
radiobeacons within range of the AgGPS  
receiver. The closest radiobeacon is  
automatically assigned to Beacon DGPS  
Channel 0, and the second closest is assigned  
to Channel 1.  
Auto Power mode  
Detects the signal strength of the two most  
powerful radiobeacons within range of the  
DSM 132 receiver. The most powerful  
radiobeacon is automatically assigned to  
Beacon DGPS Channel 0, and the second is  
assigned to Channel 1.  
Disabled mode  
Disables DGPS and forces the DSM 132  
receiver to operate in GPS mode only.  
Manual Freq mode Disables the automatic selection of  
radiobeacons so that you can manually select  
the frequency of radiobeacons for Channel 0  
and 1.  
6. If you selected:  
Auto Range Mode or Auto Power Mode, configuration is  
complete. Press 5 several times to return to the Home  
screen.  
The receiver automatically detects the two closest or two  
most powerful beacons.  
Manual Freq Mode, see EZ Bcn screens, page 72, or  
Manually selecting frequencies, page 72  
Disabled Mode, the receiver ignores incoming  
RTCM SC-104 messages and operates as a GPS-only  
receiver.  
DSM 132/132RS Receiver User Guide 71  
   
5
Configuring the Receiver  
EZ Bcn screens  
The EZ Bcn 0 and EZ Bcn 1 screens use information in RTCM SC-104  
broadcasts to create a list of beacon stations that are within range of  
the receiver. Use these screens to manually select frequencies for  
Beacon Channels 0 and 1:  
1. Navigate to the EZ Bcn 0 screen.  
2. Press 3 to select the field for Beacon Channel 0.  
3. Press 2 or 1 until the required beacon station appears:  
4. Press 4 to save the changes.  
5. Press 2 to display the EZ Bcn 1 screen.  
6. Repeat Step 2 through Step 4 to select the station for Beacon  
Channel 1.  
Manually selecting frequencies  
Note – Use this method only if you cannot find the required  
radiobeacon name in the list.  
To manually select Beacon DGPS radiobeacon frequencies using the  
EZ Bcn screens:  
1. Navigate to the Man Bcn Freqs screen.  
2. Press 3 to activate the cursor in the Beacon Channel 0 field:  
3. Press 2 or 1 to enter the frequency one number at a time.  
Press 3 to move to the next digit.  
72 DSM 132/132RS Receiver User Guide  
               
Configuring the Receiver  
5
4. Press 4 to save the changes.  
5. Press 3 to select the Beacon Channel 1 field.  
6. Repeat step 3 to enter the other required frequency.  
7. Press 4 to save changes.  
5.1  
Configuring Other DGPS Corrections  
To configure for RTCM SC104 Differential corrections to be received  
on Port A or Port B:  
1. Navigate to the Configuration menu.  
2. Navigate to the Port A Config screen (or Port B Config screen).  
3. Select a suitable port (for example, Port A In/Out) and then use  
the menu keys to specify RTCM as the input (I).  
4. The DSM 132 is now configured to use any incoming DGPS  
corrections on the selected port.  
Note – This happens even though the data displayed by the  
DGPS Source screen shows the source of the DGPS to be either  
Beacon, L-band, or WAAS/EGNOS.  
5.1  
Configuring DGPS Base Station  
You may need this option when working in a remote location where  
satellite differential correction and/or beacon tower differential  
correction is not available.  
If you have not yet done so, install the latest version of  
FlashLoader 100 on the office computer. See page 56.  
DSM 132/132RS Receiver User Guide 73  
       
5
Configuring the Receiver  
To install the Base Station option:  
1. Use the power/data cable to connect the receiver to the serial  
port on the office computer (this is usually COM1 or COM2).  
2. On the office computer, click  
and then select Programs  
3. Click Find Device.  
FlashLoader100 detects the receiver and automatically selects  
the correct port. A message appears identifying the port which  
is connected to the receiver. Click OK.  
4. Enter the password. For more information, see Step 2 through  
Step 6 on page 82.  
To configure the communication port:  
1. Navigate to the Config Port B (or Config Port A) menu.  
2. Press 2. The Port Input/Output screen appears:  
3. Press 3 to activate the cursor.  
4. Press 3 until the cursor highlights the third item on the second  
line.  
5. Press 2 until RTCMI appears:  
åæ I TSIP 9600  
801 0 RTCMI 9600  
6. Press 4 to save the settings.  
7. Press 5 several times to return to the Home screen.  
74 DSM 132/132RS Receiver User Guide  
   
Configuring the Receiver  
5
8. If necessary, change the baud rate and parity to match the  
settings used by your base station radio. For more information,  
see Configuring input / output communication, page 59.  
50.1  
Configure base station output settings  
Note – The Base Stn Config menu is available only when the Base  
Station option is installed and a communication port is configured  
correctly for it.  
In Base Station mode, the receiver outputs RTCM (GPS correction)  
data. The RTCM data can be transmitted to an external radio, which  
then broadcasts the RTCM information to other DSM 132 “rover”  
receivers in the field that are within radio range. Generally, all rover  
units are equipped with an identical radio which enables them to  
receive the RTCM data from the base station radio.  
The DSM 132 receiver has real-time capabilities, so a submeter  
reference position can be created in seconds. Set the receiver antenna  
over a known surveyed location, or allow the receiver to compute the  
reference location. Once the reference position is supplied, the  
receiver can begin computing PseudoRange correction information.  
The information is converted to RTCM output data format. This  
information is used to correct the rover’s final output position, and so  
provides submeter accuracy.  
50.2  
Base location  
You can use the Base Location screen to view the current location of  
the receiver antenna. You can also use this screen to change the setting  
for the location of the antenna. The screen provides the following  
options:  
View location, page 76  
Set from here, page 76  
Edit base position, page 77  
Set from averaged positions, page 77  
DSM 132/132RS Receiver User Guide 75  
         
5
Configuring the Receiver  
50.3  
View location  
To view the current location of the receiver antenna:  
1. Navigate to the Configuration / Base Stn Config / Base Location  
screen:  
2. Press 4 one or more times to view the current computed  
reference position, latitude, longitude, and altitude.  
Note – The reference position coordinates are in  
latitude/longitude; the datum is WGS-84; altitude is referenced  
to Mean Sea Level (MSL).  
50.1  
Set from here  
To set the receiver antenna location, select the current computed GPS  
position as follows:  
1. Navigate to the Base Location screen.  
2. Press 3 to activate the cursor.  
3. Press 1 or 2 until Set From Here is displayed.  
4. Press 4. The receiver displays three screens in succession,  
showing the current latitude, longitude, and altitude:  
To save the current coordinate value, press 4.  
To change the reference coordinate value, press 1 or 2.  
Press 3 to move between characters. Press 4 to save the  
changes.  
5. When you press 4 to accept the altitude, the receiver asks  
whether you want to accept the new reference position or not:  
Press 4 to accept the new reference position.  
76 DSM 132/132RS Receiver User Guide  
             
Configuring the Receiver  
5
Press 1 or 2 to reject the new reference position. Press  
4 to finish.  
50.1  
Edit base position  
Set the receiver antenna to a particular location. Do this when the  
antenna is on a surveyed location with known coordinates:  
1. Navigate to the Base Location screen.  
2. Press 3 to activate the cursor.  
3. Press 1 or 2 until Edit Base Pos is displayed.  
4. Press 4. The receiver displays three screens in succession,  
showing the current latitude, longitude, and altitude:  
To save the current coordinate value, press 4.  
To change the reference coordinate value, press 1 or 2.  
Press 3 to move between characters. Press 4 to save the  
changes.  
5. Once you press 4 to accept the altitude, the receiver asks  
whether or you want to accept the new reference position or not:  
Press 4 to accept the new reference position.  
Press 1 or 2 to reject the new reference position. Press  
4 to finish.  
50.1  
Set from averaged positions  
To determine the location of the receiver antenna, you can configure  
the receiver to average the computed position over a period of time:  
1. Navigate to the Base Location screen.  
2. Press 3 to activate the cursor.  
3. Press 1 or 2 until Set From Ave is displayed.  
4. Press 3 to move the cursor to the right.  
DSM 132/132RS Receiver User Guide 77  
         
5
Configuring the Receiver  
5. Press 1 or 2 to select the number of positions required to  
determine the average current location.  
6. Press 4.  
The receiver begins to average positions.  
7. Do one of the following:  
When all calculated positions are collected, press 4 to  
accept the averaged position.  
Press 3 to cancel.  
50.1  
Setting the base station mode  
To operate the receiver as a base station, set the base position, then  
select Base Station mode:  
1. Navigate to the Base Stn Config menu.  
2. Press 2 until the Base Station Mode screen appears.  
3. Press 3 to activate the cursor.  
4. Press 1 or 2 to select ON.  
5. Press 4 to save the change.  
50.1  
Setting the PRC mode  
Use the PRC Interval screen (PseudoRange Correction) to set the  
calculation interval. PseudoRange Correction is applied to the rover  
receiver’s computed GPS position to correct the final position output:  
1. Navigate to the Base Stn Config menu.  
2. Press 2 until the PRC Interval screen appears:  
78 DSM 132/132RS Receiver User Guide  
             
Configuring the Receiver  
5
3. Press 3 to activate the cursor.  
4. Press 1 or 2 to change the PRC interval.  
5. Press 4 to save the changes.  
DSM 132/132RS Receiver User Guide 79  
5
Configuring the Receiver  
80 DSM 132/132RS Receiver User Guide  
C H A P T E R  
6
6
In this chapter:  
Introduction  
Installing an Option  
Using an Option  
DSM 132/132RS Receiver User Guide 81  
   
6
Activating Firmware Options  
6.1  
Introduction  
This chapter describes how to activate and use the firmware options  
that you can purchase with the DSM 132 receiver (see Table 6.8).  
Table 6.8  
Firmware options  
Part Number  
36429-30  
Option  
Differential Base Station  
EVEREST Multipath Rejection  
RTS/CTS Flow Control Negotiation  
36429-20  
36429-50  
For more information, see Receiver enhancements, page 17.  
6.2  
Installing an Option  
To install and activate an option, use one of the following methods:  
Enter a password  
Use Flashloader100  
62.1  
Enter a password  
When you purchase an option, your Trimble Reseller provides the  
necessary password. Once entered, the password is stored in  
permanent memory and remains even when the receiver is switched  
off.  
Use the Update receiver screen of the DSM 132 menu system to enter  
the password directly into the receiver and activate the option for  
immediate field use.  
1. If you are using AgRemote, connect the receiver to an office  
computer.  
2. Navigate to the Update receiver screen. Press 4.  
The active cursor highlights the first digit.  
82 DSM 132/132RS Receiver User Guide  
                     
Activating Firmware Options  
6
3. Press 1 or 2 to enter the first number of the password.  
4. Press 3 to move to the next digit.  
5. Repeat steps 3 and 4 until all numbers are entered.  
6. Press 4 to save changes.  
The screen displays the selected option as enabled.  
If an error message appears, enter the password again. If you are still  
unsuccessful, contact your local Trimble Reseller for assistance.  
60.1  
FlashLoader100  
If you have not yet done so, install the latest version of  
FlashLoader 100 on the office computer. See page 51. Use  
FlashLoader100 to enter one or more passwords:  
1. On the office computer, click  
, then select Programs /  
Flashloader100.  
2. In the dialog that appears, select the Update receiver with  
password check box. Click Proceed.  
3. The Flash Progress dialog appears while FlashLoader100  
attempts to find the receiver. When FlashLoader100 finds the  
receiver, the Enter Passwords dialog appears.  
If FlashLoader100 cannot find the receiver, check that the  
cables are properly connected and try again.  
4. In the Enter Passwords dialog, enter the 10-digit password into  
the first blank line. If you have more than one option, enter each  
password on a separate line. Click OK.  
The process takes a few seconds and a message appears when  
completed.  
5. In the dialog that appears, click Yes to continue.  
6. When the successful operation message appears, click OK.  
The option is successfully installed.  
DSM 132/132RS Receiver User Guide 83  
         
6
Activating Firmware Options  
If any password operation fails, FlashLoader100 displays a message  
that identifies the failed option. Disconnect the receiver, then  
reconnect it and try again. For more information, see FlashLoader100,  
page 91. If you are still unsuccessful, contact your local Trimble  
Reseller for assistance.  
6.1  
Using an Option  
This section describes how to use AgRemote to configure the receiver  
for each option.  
In each case, first connect to the receiver and start AgRemote.  
61.1  
Fast Rate Output  
To configure the receiver:  
1. Navigate to the Configuration / GPS Config / Position Rate  
screen.  
2. Press 3 to activate the cursor.  
3. Press 1 or 2 to set the output rate (1, 2, 5, or 10 Hz).  
4. Press 4 to save the settings.  
5. Press 5 several times to return to the Home screen.  
To configure the communication port:  
1. Navigate to the Port A Config (or Port B Config) NMEA out  
screen.  
2. Press 3 to activate the cursor in the top line.  
3. Press 3 to move the cursor to the second digit.  
4. Press 2 until ASAP appears.  
5. Press 4 to save the settings.  
6. Press 5 several times to return to the Home screen.  
84 DSM 132/132RS Receiver User Guide  
             
A P P E N D I X  
A
A
In this appendix:  
Introduction  
Problems and Solutions  
Troubleshooting Flowcharts  
DSM 132/132RS Receiver User Quide 85  
   
A
Troubleshooting  
A.1  
Introduction  
This appendix describes some issues or problems that can occur and  
explains how to solve them. It also contains a series of troubleshooting  
flowcharts to help in problem solving  
A.2  
Problems and Solutions  
This table lists some problems that can occur and suggests possible  
solutions.  
Problem / issue  
Possible solution  
GPS  
Poor accuracy  
The accuracy of GPS positions is  
poor because the receiver is picking  
up poor quality signals from the  
satellites.  
Change some or all of the following GPS settings:  
Minimum elevation – Increase the setting  
(the default is 8°).  
Minimum Signal Strength Increase the System  
Mask AMU setting  
(the default is 3).  
The receiver always calculates the  
most accurate position it can given  
the current GPS satellite differential  
operating conditions.  
Maximum PDOP – Decrease the setting  
(the default is 13).  
GPS Mode – Change to Manual 3D  
(the default is Auto 2D/3D).  
DGPS Mode – Change to DGPS  
(the default is DGPS Auto/On/Off).  
GPS signals are reflecting off nearby  
trees and/or metal buildings and  
horizontal surfaces.  
To reduce multipath noise, mount the GPS receiver  
so that it has a clear view of the sky. The receiver  
must be away from trees and large metal objects.  
86 DSM 132/132RS Receiver User Quide  
               
Troubleshooting  
A
Problem / issue  
Possible solution  
Intermittent loss of lock  
The receiver loses the satellite signal  
from time to time.  
Check that all cable connections are secure and  
free of moisture. If necessary, disconnect the cables  
and allow them to dry. Then reconnect the cables.  
Make sure that the receiver is mounted on the  
highest point of the vessel, and is clear of metal  
surfaces.  
Try traveling in a different direction.  
Check Maximum PDOP and Minimum Signal  
Strength settings (see Poor accuracy above).  
Intermittent DGPS signal  
The correction signal strength can be  
reduced to unusable levels. Causes  
include tree canopy cover between  
the receiver and the differential  
satellite, radar sets, and microwave  
transmitters.  
Make sure that the receiver is mounted away from  
overhead trees and sources of electromagnetic  
interference.  
Not tracking satellites or  
differential signal  
The receiver is not tracking satellites,  
and the Home screen displays  
(Sv:00). The receiver is searching for  
a satellite or beacon signal.  
Check the cable connections at the receiver and  
antenna.  
DSM 132/132RS Receiver User Quide 87  
A
Troubleshooting  
Problem / issue  
Possible solution  
Tracking but not receiving a  
differential signal  
The receiver is tracking satellites and  
tracking an OmniSTAR or Thales  
satellite beam, but is not receiving  
DGPS signals.  
You need to check that your DGPS service  
subscription is still current and enabled.  
For OmniSTAR service:  
1. Navigate to the Omni Srv Info screen and press  
4 until Stop Date appears.  
2. If the message Access Unknown appears,  
subscription.  
For Thales service:  
1. Navigate to the Thales Srv Info screen and  
press 4 once.  
2. If the message Access Unknown appears,  
contact Thales to reactivate your subscription.  
For more information, see Paid Subscription  
Services, page 63.  
The receiver must be switched on and configured to  
track the correct satellite coverage beam before it  
can be reactivated.  
When a satellite subscription is activated the Home  
screen displays D/3D.  
No GPS position output from the  
receiver after connecting to  
AgRemote  
When the receiver is connected to  
AgRemote, the port communication  
settings are automatically reset to  
TSIP 8-O-1 for both input and output.  
However most devices and software  
programs accept NMEA 4800-8-N-1  
output as standard.  
Connect AgRemote. Then reset the port  
communication settings to NMEA output. For more  
information, see Configuring the Communication  
Ports, page 57.  
88 DSM 132/132RS Receiver User Quide  
       
Troubleshooting  
A
Problem / issue  
Interference  
Possible solution  
Strong magnetic fields  
Strong magnetic fields have no effect  
on GPS or satellite DGPS signals.  
If you suspect interference from a local magnetic  
field, move the receiver away from, or turn off the  
suspect electronics while observing the GPS  
receiver’s number of satellites being tracked or  
satellite’s signal-to-noise ratio.  
However, some computers and other  
electric equipment radiate  
electromagnetic energy that can  
interfere with a GPS receiver.  
FM 2-way radios  
Transmitting FM 2-way radios can  
interfere with OmniSTAR, Racal,  
WAAS and GPS signal reception.  
Make sure that there is at least 1 m (3 ft) between  
the FM 2-way radio antenna and the receiver.  
Engine Noise  
An unshielded ignition system can  
cause enough noise to block  
reception of a beacon signal.  
Use resistor spark plug wires on the ignition system  
of the vessel.  
An alternator can cause noise that  
interferes with a beacon signal.  
Use bypass capacitors, commonly available in  
automotive stores for cleaning up interference to  
CB and other radios. If the problem persists, shield  
engine components with aluminum foil.  
Relocate the antenna on the machine.  
Determine the optimal antenna location by watching  
the signal-to-noise ratio (SNR) value on the  
AgRemote Home screen. When using a beacon  
differential correction signal, aim for a value of 10 or  
higher.  
Note – Before replacing engine parts in an attempt to  
solve this problem, make sure that the problem is not  
caused by a computer or power source near the  
receiver. Some office computers and their power  
sources cause noise that is disruptive to the GPS and  
satellite DGPS signals.  
Receiver  
Mounting location  
The receiver is not picking up a clear  
signal.  
Mount the receiver on the centerline of the vehicle,  
away from any sources of interference and with a  
clear view of the sky (see page 27).  
DSM 132/132RS Receiver User Quide 89  
   
A
Troubleshooting  
Problem / issue  
Possible solution  
Cables  
One of the cables seems faulty.  
Use an ohmmeter to check the cable. The  
resistance of a good cable between connector pins  
at each end of the cable is zero.  
If the cable is sound, but the problem persists, try  
exchanging the cable with one that you know is  
working.  
If the cable is defective, contact your local Trimble  
Reseller for an RMA number (if the Trimble product  
is still under warranty), or to purchase a  
replacement cable.  
Configuration settings  
The receiver configuration settings  
are stored in RAM, which is supported  
by a lithium-ion battery that has a life  
of 10 years. If the battery fails, custom  
configuration settings are lost.  
Contact your local Trimble reseller for replacement  
batteries.  
Note – When this happens, the receiver  
starts to use the default configuration  
settings.  
Factory defaults  
You need to restore the receiver  
factory defaults.  
To restore receiver factory default settings:  
1. Connect the receiver to an office computer and  
switch it on.  
2. Run AgRemote.  
3. Navigate to the Clear BB RAM screen.  
4. Press 2 until Yes appears.  
5. Press 4.  
The factory default settings are restored. The  
DGPS service subscription is not lost. See page 63.  
90 DSM 132/132RS Receiver User Quide  
Troubleshooting  
A
Problem / issue  
FlashLoader100  
Possible solution  
The FlashLoader100 upgrade utility  
cannot detect the receiver or  
download the firmware.  
Make sure that:  
• the receiver is using the latest firmware version  
• the receiver is connected to a 12–32 VDC power  
source  
• all cables are connected correctly between the  
device and the office computer  
• FlashLoader100 is attempting to connect to the  
correct device. (From the FlashLoader100 menu,  
select Options / Settings. Then select the  
Receiver check box).  
• the receiver is connected to the correct office  
computer COM port. (From the FlashLoader100  
menu, select Options / Settings. Then select the  
check box for the required COM port.)  
• other programs are not using the same COM  
port as the office computer  
Once you have checked this, switch off the receiver  
then switch it on again. Try again to connect  
FlashLoader100.  
AgRemote  
AgRemote cannot to communicate  
with the receiver (all you see is a  
blank screen).  
• Make sure that the receiver is connected to a  
12–32 VDC power source.  
• Check all cable connections between the  
receiver and the office computer.  
• Make sure that you are using the correct COM  
port.  
Once you have checked this, switch off the receiver,  
then switch it on again. Select File / Connect.  
DSM 132/132RS Receiver User Quide 91  
   
A
Troubleshooting  
A.1  
Troubleshooting Flowcharts  
This section contains flowcharts for troubleshooting the following  
areas:  
System hardware and power  
GPS reception  
OmniSTAR  
Thales  
As you proceed through these guides, you may need to view the  
receiver status or change values in some fields. For information on  
how to do this, see Menu System Fields, page 44.  
In addition, you may find it useful to review Chapter 3, Installing the  
Receiver.  
92 DSM 132/132RS Receiver User Quide  
 
Figure A.1  
System hardware and power troubleshooting flowchart  
DSM 132/132RS Receiver User Guide 93  
 
Figure A.2  
GPS reception troubleshooting flowchart  
94 DSM 132/132RS Receiver User Guide  
 
Figure A.3  
OmniSTAR troubleshooting flowchart  
DSM 132/132RS Receiver User Guide 95  
 
Figure A.4  
Thales troubleshooting flowchart  
96 DSM 132/132RS Receiver User Guide  
 
A P P E N D I X  
B
B
In this chapter:  
Introduction  
Port A and Port B Connectors  
Standard Power/Data Cable  
DSM 132/132RS Receiver User Guide 97  
   
B
Cables and Connectors  
B.2  
Introduction  
This appendix contains pin-out information for the DSM 132 receiver  
standard and optional cables. Use the information to troubleshoot  
communication problems with the receiver and devices not supported  
by the standard and optional cables.  
B.3  
Port A and Port B Connectors  
Table B.1 gives pin-out requirements for the DSM 132 receiver Port A  
and Port B connectors.  
Table B.1  
DSM 132 Port A and Port B  
Pin  
1
Port A connector  
Event In  
Port B connector  
Event In  
2
RS-232 B Out  
RS-232 B In  
CAN Hi  
RS-232 A Out  
RS-232 A In  
CAN Hi  
3
4
5
Ground  
Ground  
6
RTS Out  
RTS Out  
7
Power On/Off  
CTS In  
Power On/Off  
CTS In  
8
9
CAN Low  
CAN Low  
10  
11  
12  
Battery +V  
Battery –V  
1 PPS Output  
Battery +V  
Battery –V  
1 PPS Output  
98 DSM 132/132RS Receiver User Guide  
         
Cables and Connectors  
B
B.4  
Standard Power/Data Cable  
Table B.2 gives pin-out information for the standard power/data cable  
(PN 30945).  
Table B.2  
Standard power/data cable  
7 cond To computer To DC power  
To receiver  
P1 connector  
cable  
P2 connector 2 conductor  
DE9 (female) cable  
12-pin (female)  
Pin Signal  
Color  
Pin Signal  
Color Signal  
1
Event In  
Black  
4
DTR  
2
3
TXD  
RXD  
Orange  
Red  
2
3
RXD  
TXD  
4
5
SIG GND  
Shield  
5
SIG  
GND  
6
8
RTS  
CTS  
Yellow  
Green  
8
7
RTS  
CTS  
9
7
1
PWR ON  
V+ IN  
1
10  
11  
12  
Red  
Red  
V+ IN  
V– IN  
Black  
Blue  
Black  
V– OUT  
PPS  
9
PPS  
1Pins 7 and 10 of the P1 connector are jumpered with a 5 kOhm, 5% resistor  
DSM 132/132RS Receiver User Guide 99  
     
B
Cables and Connectors  
100 DSM 132/132RS Receiver User Guide  
A P P E N D I X  
C
Introduction  
NMEA-0183 Message Structure  
NMEA Message Summary  
GGA (GPS Fix Data)  
GLL (Position Data)  
GRS (GPS Range Residuals)  
GSA (GPS DOP and Active Satellites)  
GST (GPS PRN)  
GSV (GPS Satellites in View)  
MSS (Beacon Receiver Signal Status)  
RMC (Recommended Minimum Specific GPS Data)  
VTG (Course Over Ground and Ground Speed)  
XTE (Cross-Track Error)  
ZDA (Time and Date)  
PTNLEV Proprietary (Event Marker)  
DSM 132/132RS Receiver User Guide 101  
   
C
NMEA-0183 Messages  
PTNLID Proprietary (Trimble Receiver ID)  
PTNLDG Proprietary (Trimble DGPS Receiver Status)  
PTNL,GGK (Time, Position, Position Type, and DOP)  
PTNLSM Proprietary (RTCM Special)  
102 DSM 132/132RS Receiver User Guide  
NMEA-0183 Messages  
C
C.5  
Introduction  
Trimble DSM 132 receivers output NMEA (National Marine  
Electronic Association) messages for GPS position data transfer  
between electronics equipment. Information on the NMEA-0183  
communication standard for GPS receivers is available at:  
This appendix describes NMEA-0183 standard messages that are  
configured using TSIP command packets.  
Other messages are supported only when specific Trimble options are  
installed on the receiver. Messages beginning with PTNL are Trimble  
proprietary messages.  
DSM 132/132RS Receiver User Guide 103  
         
C
NMEA-0183 Messages  
C.6  
NMEA-0183 Message Structure  
NMEA-0183 messages are strings of comma-delimited text.  
Figure C.5 shows the structure of an NMEA-0183 message.  
Asterisk Delimiter  
Comma Delimiter  
$GPZDA,220320.0,26,06,1997,00,00*52  
Sentence ID  
Field 1  
Field 2  
Field 3  
Field 4  
Field 5  
Field 6  
Checksum  
Figure C.5  
Example showing NMEA-0183 message structure — ZDA  
Each NMEA message includes:  
an identifier to distinguish it from other messages in the data  
stream  
one or more fields of data, separated by a comma  
a checksum (preceded by *) to validate the data  
104 DSM 132/132RS Receiver User Guide  
       
NMEA-0183 Messages  
C
Table C.3 explains the fields in the ZDA example shown in  
Figure C.5.  
Table C.3  
Fields in an NMEA-0183 message — ZDA  
Description  
Field  
Data  
220320.0  
1
2
3
4
5
Time in UTC  
Day (01 to 31)  
Month (01 to 12)  
Year  
26  
06  
1997  
-5  
Local time zone offset from GMT  
(in hours 00 to ±13 hours)  
6
15  
Local time zone offset from GMT (in minutes)  
Fields 5 and 6 together give the total offset. Local time is 5 hours and  
15 minutes earlier than GMT.  
C6.1  
Symbols and delimiters  
All messages follow the NMEA-0183 Version 2.1 format, in which  
symbols and delimiters identify or separate the message data.  
NMEA-0183 messages always:  
begin with a dollar sign ($) followed by a talker ID code (for  
example GP) and a message ID code (for example, ZDA)  
end with a carriage return and line feed  
C6.2  
Checksum values  
Newer Trimble receivers conform to the NMEA-0183 Version 2.1  
format, in which checksums are mandatory for all messages.  
DSM 132/132RS Receiver User Guide 105  
           
C
NMEA-0183 Messages  
The checksum is calculated from all characters in the message,  
including commas but excluding the “$” and “*” delimiters. The  
hexadecimal result is converted to two ASCII characters (0–9, A–F),  
of which the most significant appears first.  
C6.3  
C6.4  
Field formats  
The data values output by Trimble AgGPS receivers meet the  
NMEA-0183 Version 2.1 standard.  
Null fields  
If a message contains a fixed number of fields, null (empty) fields are  
included if no data is available. These fields are usually reserved for  
data that is transmitted on a periodic or irregular basis.  
C6.5  
Talker ID codes  
Talker ID code identifies the source of the data (for example, GPS,  
Loran C, or Sounder). Table C.4 describes the Talker ID codes that are  
available for NMEA-0183 output from most Trimble receivers.  
Table C.4  
Supported Talker ID codes  
Code  
GP  
LG  
LC  
Description  
GPS  
Loran C/ GPS  
Loran C  
II  
Integrated Instrumentation  
106 DSM 132/132RS Receiver User Guide  
                     
NMEA-0183 Messages  
C
C6.6  
Latitude and longitude values  
The latitude and longitude values in NMEA-0183 messages are  
presented in degrees, minutes, and decimal minutes, in a single field:  
latitude (ddmm.mmmm)  
longitude (dddmm.mmmm)  
Latitude and longitude direction values are sent in a separate field as  
N, S, E, or W.  
C6.7  
Time values  
Time values in Universal Time Coordinated (UTC) are presented in  
hhmmss.ss format, where hh is hours (00–23), mm is minutes, and  
ss.ss is seconds and fractions of seconds.  
C6.8  
Reading NMEA string format  
Be aware that NMEA strings can be of varying length, depending on  
how the receiver is configured. Comma delimited parsing is  
recommended.  
C.7  
NMEA Message Summary  
Table C.5 describes the NMEA-0183 message set that is supported by  
the DSM 132 receivers.  
Note – Some messages are only supported when specific Trimble  
options are installed on the receiver.  
DSM 132/132RS Receiver User Guide 107  
               
C
NMEA-0183 Messages  
Messages beginning with PTNL are Trimble proprietary messages.  
Table C.5  
Message  
Message Contents  
GGA (GPS Fix Data)  
GLL (Position Data)  
Time, position, and fix related data  
Position fix, time of position fix, and status  
GPS range residuals  
GRS (GPS Range  
Residuals)  
GSA (GPS DOP and  
GPS position fix mode, SVs used for navigation and DOP values  
GPS Pseudorange Noise (PRN) statistics  
GSV (GPS Satellites in  
View)  
Number of SVs visible, PRN numbers, elevation, azimuth and SNR  
values  
MSS (Beacon Receiver Signal strength, signal-to-noise ratio, beacon frequency, and  
Signal Status)  
beacon bit rate  
Minimum Specific GPS  
Data)  
UTC time, status, latitude, longitude, speed over ground (SOG),  
date, and magnetic variation of the position fix  
VTG (Course Over  
Ground and Ground  
Speed)  
Actual track made good and speed over ground  
XTE (Cross-Track Error) Cross-track error  
ZDA (Time and Date)  
UTC time, day, month, and year, local zone number and local zone  
minutes  
PTNLDG Proprietary  
Beacon channel strength, channel SNR, channel frequency,  
(Trimble DGPS Receiver channel bit rate, channel number, channel tracking status, RTCM  
Status)  
source, and channel performance indicator  
PTNLEV Proprietary  
(Event Marker)  
Time, event number, and event line state for time-tagging change of  
state on an event input line  
108 DSM 132/132RS Receiver User Guide  
 
NMEA-0183 Messages  
C
Table C.5  
NMEA message summary (continued)  
Message Contents  
PTNL,GGK (Time,  
Position, Position Type,  
Time, Position, Position Type and DOP values  
PTNLID Proprietary  
(Trimble Receiver ID)  
Receiver machine ID, product ID, major and minor release  
numbers, and firmware release date  
PTNLSM Proprietary  
(RTCM Special)  
Reference Station Number ID and the contents of the Special  
Message included in valid RTCM Type 16 records  
All messages in this appendix are presented in the format shown in  
Table C.3. In each example, the structure is shown in the paragraph  
before the table.  
C.8  
The GGA message contains the time, position, and fix related data.  
The GGA message structure is:  
$GPGGA,151924,3723.454444,N,12202.269777,  
W,2,09,1.9,–17.49,M,–25.67,M,1,0000*57  
Table C.6 describes these fields.  
Table C.6  
GGA message fields  
Field  
Description  
1
2
3
UTC of position fix in HHMMSS.SS format  
Latitude in DD MM,MMMM format (0-7 decimal places)  
Direction of latitude  
N: North  
S: South  
4
Longitude in DDD MM,MMMM format (0-7 decimal places)  
DSM 132/132RS Receiver User Guide 109  
     
C
NMEA-0183 Messages  
Table C.6  
GGA message fields (continued)  
Field  
Description  
5
Direction of longitude  
E: East  
W: West  
6
GPS Quality indicator  
0:  
1:  
2:  
fix not valid  
GPS fix  
DGPS fix  
7
Number of SVs in use, 00-12  
8
HDOP  
9
Antenna height, MSL reference  
10  
11  
12  
13  
14  
“M” indicates that the altitude is in meters  
Geoidal separation  
“M” indicates that the geoidal separation is in meters  
Age of differential GPS data record, Type 1; Null when DGPS not used  
Base station ID, 0000-1023  
110  
DSM 132/132RS Receiver User Guide  
NMEA-0183 Messages  
C
C.9  
The GLL message specifies the position fix, time of position fix, and  
status.  
The GLL message structure is:  
$GPGLL,3723.4543,N,12202.2696,W,151933,  
A*3E  
Table C.7 describes these fields.  
Table C.7  
GLL message fields  
Field  
Description  
1
2
Latitude in dd mm,mmmm format (0-7 decimal places)  
Direction of latitude  
N: North  
S: South  
3
4
Longitude in ddd mm,mmmm format (0-7 decimal places)  
Direction of longitude  
E: East  
W: West  
5
6
UTC of position in hhmmss.ss format  
Fixed text “A” shows that data is valid  
DSM 132/132RS Receiver User Guide 111  
     
C
NMEA-0183 Messages  
C.10  
The GRS message is used to support the Receiver Autonomous  
Integrity Monitoring (RAIM).  
The GRS message structure is:  
$GPGRS,220320.0,0,-0.8,-0.2,-0.1,  
-0.2,0.8,0.6,,,,,,,*55  
Table C.8 describes these fields.  
Table C.8  
GRS message fields  
Field  
Description  
1
2
UTC time of GGA position fix  
Residuals  
0:  
Residuals used to calculate position given in the matching  
GGA line  
1:  
Residuals recomputed after the GGA position was computed  
3-14  
Range residuals for satellites used in the navigation solution, in  
meters  
Note – Because the contents of this NMEA message do not change  
significantly during a one-second interval, the receiver outputs this  
message at a maximum rate of 1 Hz.  
112  
DSM 132/132RS Receiver User Guide  
           
NMEA-0183 Messages  
C
C.11  
The GSA message identifies the GPS position fix mode, the SVs used  
for navigation, and the Dilution of Precision values.  
The GSA message structure is:  
$GPGSA,A,3,19,28,14,18,27,22,31,29,,,,,  
1.7,1.0,1.3*35  
Table C.9 describes these fields.  
Table C.9  
GSA message fields  
Field  
Description  
1
Mode  
M: Manual, forced to operate in 2D or 3D  
A: Automatic, 3D/2D  
2
Mode  
1:  
2:  
3:  
Fix not available  
2D  
3D  
3–14  
15  
IDs of SVs used in position fix (null for unused fields)  
PDOP  
HDOP  
VDOP  
16  
17  
DSM 132/132RS Receiver User Guide 113  
     
C
NMEA-0183 Messages  
C.12  
The GST message is used to support Receiver Autonomous Integrity  
Monitoring (RAIM).  
The GST message structure is:  
$GPGST,220320.0,1.3,0.8,0.5,166.1,0.8,0.5,1.6,*4F  
Table C.10 describes these fields.  
Table C.10 GST message fields  
Field  
Description  
1
2
UTC time of GGA fix  
RMS value of the standard deviation of the range inputs to the  
navigation process (range inputs include pseudoranges and DGPS  
corrections)  
3
4
5
Standard deviation of semi-major axis of error ellipse, in meters  
Standard deviation of semi-minor axis of error ellipse, in meters  
Orientation of semi-major axis of error ellipse, in degrees from true  
north  
6
7
8
Standard deviation of latitude error, in meters  
Standard deviation of longitude error, in meters  
Standard deviation of altitude error, in meters  
Note – Because the contents of this NMEA message do not change  
significantly during a one-second interval, the receiver outputs this  
message at a maximum rate of 1 Hz.  
114  
DSM 132/132RS Receiver User Guide  
           
NMEA-0183 Messages  
C
C.13  
The GSV message identifies the number of SVs in view, the PRN  
numbers, elevation, azimuth and SNR values.  
The GSV message structure is:  
$GPGSV,4,1,13,02,02,213,,03,  
-3,000,,11,00,121,,14,13,172,05*67  
Table C.11 describes these fields.  
Table C.11 GSV message fields  
Field  
Description  
1
Total number of messages of this type in this cycle  
Message number  
2
3
Total number of SVs visible  
SV PRN number  
4
0
5
Elevation in degrees, 90 maximum  
0
0
6
Azimuth, degrees from true north, 000 to 359  
7
SNR, 00-99 dB (null when not tracking)  
8–11  
12–15  
16–19  
Information about second SV, same format as fields 4–7  
Information about third SV, same format as fields 4–7  
Information about fourth SV, same format as fields 4–7  
Note – Because the contents of this NMEA message do not change  
significantly during a one-second interval, the receiver outputs this  
message at a maximum rate of 1 Hz.  
DSM 132/132RS Receiver User Guide 115  
     
C
NMEA-0183 Messages  
C.14  
The MSS message identifies the status of the beacon signal, including  
the beacon signal strength, beacon signal-to-noise ratio (SNR), beacon  
frequency, and beacon bit rate.  
The MSS message structure is:  
$GPMSS,52.5,23.7,287.0,100*4C  
Table C.12 describes these fields.  
Table C.12 MSS message fields  
Field  
Description  
1
2
3
4
5
Signal strength (SS), dB ref: 1 υV/m  
Signal-to-Noise Ratio (SNR), dB  
Beacon frequency, 283.5–325.0 kHz  
Beacon bit rate (25, 50, 100, 200), bits per second  
Channel number  
Note – Because the contents of this NMEA message do not change  
significantly during a one-second interval, the receiver outputs this  
message at a maximum rate of 1 Hz.  
116  
DSM 132/132RS Receiver User Guide  
   
NMEA-0183 Messages  
C
C.15  
RMC (Recommended Minimum Specific GPS Data)  
The RMC message identifies the UTC time, status, latitude, longitude,  
speed over ground (SOG), date, and magnetic variation of the position  
fix.  
The RMC message structure is:  
$GPRMC,184804.00,A,3723.476543,N,  
12202.239745,W,000.0,0.0,051196,15.6,E*7C  
Table C.13 describes these fields.  
Table C.13 RMC message fields  
Field  
Description  
1
2
Time: UTC time of the position fix in hhmmss.ss format  
Status  
A: Valid  
V:  
Navigation Receiver Warning (V is output whenever the  
receiver suspects something is wrong)  
3
Latitude coordinate (the number of decimal places, 0–7, is  
programmable and determined by the numeric precision selected in  
TSIP Talker for a RMC message)  
4
5
Latitude direction  
N = North, S = South  
Longitude coordinate (the number of decimal places, 0–7, is  
programmable and determined by the numeric precision selected in  
TSIP Talker for a RMC message)  
6
Longitude direction  
W: West  
E: East  
7
Speed Over Ground (SOG) in knots (0–3 decimal places)  
Track Made Good, True, in degrees  
Date in dd/mm/yy format  
8
9
10  
Magnetic Variation in degrees  
DSM 132/132RS Receiver User Guide 117  
     
C
NMEA-0183 Messages  
Table C.13 RMC message fields (continued)  
Field  
Description  
11  
Direction of magnetic variation  
E: Easterly variation from True course (subtracts from True  
course)  
W: Westerly variation from True course (adds to True course)  
12  
Mode indication  
A: Autonomous  
D: Differential  
N: Data not valid  
118  
DSM 132/132RS Receiver User Guide  
NMEA-0183 Messages  
C
C.16  
The VTG (Velocity True Ground) message identifies the actual track  
made good and speed over ground.  
The VTG message structure is:  
$GPVTG,0,T,,,0.00,N,0.00,K*33  
Table C.14 describes these fields.  
Table C.14 VTG message fields  
Field  
Description  
1
2
3
4
5
6
7
8
Track made good  
Fixed text “T” shows that track made good is relative to true north  
Not used  
Not used  
Speed over ground in knots (0–3 decimal places)  
Fixed text “N” shows that speed over ground is in knots  
Speed over ground in kilometers/hour (0–3 decimal places)  
Fixed text “K” shows that speed over ground is in kilometers/hour  
Note – Because the contents of this NMEA message do not change  
significantly during a one-second interval, the receiver outputs this  
message at a maximum rate of 1 Hz.  
DSM 132/132RS Receiver User Guide 119  
     
C
NMEA-0183 Messages  
C.17  
XTE (Cross-Track Error)  
The XTE message reports the cross-track error of the vessel.  
The XTE message structure is:  
$GPXTE,A,A,0.050,L,N*5E  
Table C.15 describes these fields.  
Table C.15 XTE message fields  
Field  
Description  
1
2
3
4
A: Valid (fixed)  
A: Valid (fixed)  
Cross-track error, in nautical miles  
Direction to steer  
L:  
Left  
R: Right  
5
N: Nautical mile units  
C.18  
The ZDA message identifies UTC time, day, month, and year, local  
zone number and local zone minutes.  
The ZDA message structure is:  
$GPZDA,184830.15,05,11,1996,00,00*66  
Table C.16 describes these fields.  
Table C.16 ZDA message fields  
Field  
Description  
UTC time  
Day  
1
2
3
Month  
120 DSM 132/132RS Receiver User Guide  
             
NMEA-0183 Messages  
C
Table C.16 ZDA message fields (continued)  
Field  
Description  
4
5
6
Year  
Local zone number (– for East Longitude)  
Local zone minutes  
Note – Because the contents of this NMEA message do not change  
significantly during a one-second interval, the receiver outputs this  
message at a maximum rate of 1 Hz.  
C.19  
The PTNLEV message is a Trimble proprietary message for  
time-tagging and marking when an event input occurs. If enabled, this  
event message is output whenever an event is detected.  
The PTNLEV message structure is:  
$PTNLEV,184804.00,0*XX  
Table C.17 describes these fields.  
Table C.17 PTNLEV message fields  
Field  
Description  
1
2
Time: UTC time of the position fix in hhmmss.ss format  
Event number, starting with event 0  
DSM 132/132RS Receiver User Guide 121  
     
C
NMEA-0183 Messages  
C.20  
PTNLID Proprietary (Trimble Receiver ID)  
The PTNLID message is a Trimble proprietary message for  
identifying the machine ID, product ID, major and minor release  
numbers, and firmware release date of the receiver.  
The PTNLID message structure is:  
$PTNLID,097,01,XXX,XXX,DD/MM/YY*XX  
Table C.18 describes these fields.  
Table C.18 PTNLID message fields  
Field  
Description  
1
2
3
4
5
Machine ID  
Product ID  
Major firmware release number  
Minor firmware release number  
Firmware release date, in dd/mm/yy format  
The PTNLID message, if enabled, is output every 30 seconds.  
122 DSM 132/132RS Receiver User Guide  
     
NMEA-0183 Messages  
C
C.21  
PTNLDG Proprietary (Trimble DGPS Receiver  
Status)  
The PTNLDG message is a Trimble proprietary message for  
identifying the DGPS receiver channel strength, channel SNR,  
channel frequency, channel bit rate, channel number, channel tracking  
status, RTCM source, and channel performance indicator for either  
beacon DGPS or satellite DGPS.  
The PTNLDG message structure is:  
$PTNLDG,87.0,5.2,1558510.0,1200,2,4,1,25,,,*01  
Table C.19 describes these fields.  
Table C.19 PTNLDG message fields  
Field  
Description  
1
Channel signal strength, in 1 dBuV/m. For beacon, this is the  
electromagnetic field intensity level. For satellite, this is the ADC  
input voltage level.  
2
3
4
5
6
Channel signal to noise (SNR) level, in dB  
Channel frequency, in kHz  
Channel bit rate, in bits per second (bps)  
Channel number, 0–99  
Channel tracking status  
0:  
1:  
2:  
3:  
4:  
5:  
Channel idle  
Wideband FFT search  
Searching for signal  
Channel has acquired signal  
Channel has locked on signal  
Channel disabled  
7
8
Specified channel is used as RTCM source  
0:  
1:  
Not used  
Used  
Channel tracking performance indicator. For beacon, this is the  
number of errors in the last 255 words. For satellite, this is the time  
since last sync, in tenths of seconds ranging from 0–255.  
DSM 132/132RS Receiver User Guide 123  
     
C
NMEA-0183 Messages  
The PTNLDG message fields are defined in free format.  
The maximum number of characters in each field is indicated above  
(for example, 25 bps displayed as xxx,25,xxx instead of  
xxx,00025,xxx).  
If a channel is disabled, the channel fields can be null fields (showing  
commas only). If more than one channel is available, the message  
should be repeated for each channel.  
This message can be enabled using TSIP. If enabled, it is output at the  
NMEA report rate.  
Note – Because the contents of this NMEA message do not change  
significantly during a one-second interval, the receiver outputs this  
message at a maximum rate of 1 Hz.  
C.22  
PTNL,GGK (Time, Position, Position Type, and  
DOP)  
The PTNL,GGK message structure is:  
$PTNL,GGK,172814.00,071296,3723.46587704,  
N,12202.26957864,W,3,06,1.7,EHT-6.777,M*48  
Table C.20 describes these fields.  
Table C.20 PTNL,GGK message fields  
Field  
In this appendix:Description  
1
2
3
UTC of position fix, in hhmmss.ss format  
UTC Date of position, in mmddyy format  
Latitude, in degrees and decimal minutes (for example,  
dddmm.mmmmmmm)  
4
5
Direction of latitude  
N: North  
S: South  
Longitude, in degrees and decimal minutes (for example,  
dddmm.mmmmmmm)  
124 DSM 132/132RS Receiver User Guide  
       
NMEA-0183 Messages  
Table C.20 PTNL,GGK message fields (continued)  
C
Field  
In this appendix:Description  
6
Direction of longitude  
E: East  
W: West  
7
GPS quality indicator  
0:  
1:  
4:  
Fix not available or invalid  
Autonomous GPS fix  
Differential, code phase only solution (DGPS)  
8
Number of satellites used in GPS solution  
DOP of fix  
9
10  
11  
Ellipsoidal height of fix (antenna height above ellipsoid)  
M: Ellipsoidal height is measured in meters  
C.23  
PTNLSM Proprietary (RTCM Special)  
The PTNLSM message is a Trimble proprietary message for  
identifying the Reference Station ID and the ASCII Text message that  
is included in an RTCM Type 16 Special Message. The PTNLSM  
message is generated anytime an RTCM stream receives a valid Type  
16 Special Message.  
The PTNLSM message structure is:  
$PTNLSM,0022,This is a message,*.XX  
Table C.21 describes these fields.  
Table C.21 PTNLSM message fields  
Field  
Description  
1
Reference station ID number, ranging from 0 to 1023. Leading  
zeros must be added to fill four-digit field.  
2
ASCII text message contained within the Type 16 RTCM message.  
DSM 132/132RS Receiver User Guide 125  
         
C
NMEA-0183 Messages  
126 DSM 132/132RS Receiver User Guide  
A P P E N D I X  
D
D
In this appendix:  
DSM132 Menu System  
Navigation map for DSM 132 receiver — Home, Field Operations, and  
Status menu  
Navigation map for DSM 132 receivers — Configuration menu  
DSM 132/132RS Receiver User Guide 127  
   
D
Navigation Maps  
D.24  
The figures in this appendix show the navigation maps for the  
DSM132 Menu System, and relate to firmware version 1.7.  
Basic instructions for navigating through the menu system are  
included in Chapter 4, Getting Started.  
Basic instructions for configuring the receiver for operation are  
included in Chapter 5, Configuring the Receiver.  
128 DSM 132/132RS Receiver User Guide  
   
Figure D.6  
Navigation map for DSM 132 receiver — Home, Field Operations, and Status  
menu  
DSM 132/132RS Receiver User Guide 129  
   
Figure D.6  
Navigation map for DSM 132 receivers — Configuration menu  
130 DSM 132/132RS Receiver User Guide  
   
A P P E N D I X  
E
E
DMS 132 Receiver  
Combined Antenna  
GPS Channels  
Beacon Channels  
L-Band Satellite Differential Correction Receiver  
Receiver Default Settings  
DSM 132/132RS Receiver User Guide 131  
   
E
Specifications  
E.1  
DMS 132 Receiver  
Table E.1 lists the characteristics of the DSM 132.  
Table E.1  
Size  
DMS 132 Receiver characteristics  
14.5 cm W x 5.1 cm H x 19.5 cm D  
(5.7 in W x 2.0 in H x 7.7 in D)  
0.76 kg (1.68 lb)  
Weight  
Power  
7 Watts (max), 10–32 VDC  
Operating temperature  
Humidity  
–20 °C to +65 °C (–4 °F to +149 °F)  
–30 °C to +85 °C (–22 °F to +185 °F)  
100% condensing, unit fully sealed  
Dust-proof, waterproof, shock resistant  
Casing  
E.2  
Combined Antenna  
Table E.2 lists the physical characteristics of the combined antenna.  
Table E.2  
Combined antenna characteristics  
DSM 132 Receiver  
Size  
15.5 cm D x 14.0 cm H  
(6.1 in D x 5.5 in H)  
Weight  
0.55 Kg (1.2 lb)  
Operating temperature  
Storage temperature  
Humidity  
–30 °C to +65 °C (–22 °F to +149 °F)  
–40°C to +80°C (–40 °F to +176 °F)  
100% condensing, unit fully sealed  
Casing  
Dust-proof, waterproof, shock  
resistant  
132 DSM 132/132RS Receiver User Guide  
               
Specifications  
E
E.3  
GPS Channels  
Table E.3 lists the performance characteristics of GPS channels.  
Table E.3  
General  
GPS channels performance characteristics  
12-channel, parallel tracking L1 1571.42 MHz C/A code and carrier  
phase filtered measurements and multi-bit digitizer  
Update rate  
Selectable 1, 2, 5, or 10 Hz output rate)  
0.16 kph (0.1 mph)  
Differential speed  
accuracy  
Differential position  
accuracy  
Less than 1 m horizontal RMS if all the following criteria are met;  
At least 5 satellites,  
PDOP < 4  
RTCM SC-104  
Standard format broadcast from a Trimble DSM 132RS or  
equivalent reference station  
Time to first fix  
< 30 seconds, typical  
1
1
NMEA messages  
GGA, GLL, GSR, GSA , GST, GSV, MSS, PTNLDG, PTNL,  
1
1
PTNLEV, PTNLID, PTNLSM, RMC , VTG , XTE, ZDA  
1By default, the receiver is configured to output GGA, GSA, RMC, and VTG messages at an 1 Hz (1  
position/second) update rate.  
E.4  
Beacon Channels  
Table E.4 lists the characteristics of the beacon channels.  
Table E.4  
Beacon Channels  
Frequency range  
Channel Spacing  
Beacon modulation  
Signal strength  
283.5 kHz to 325.0 kHz  
500 Hz  
50, 100, and 200 bits/second  
10 µV/meter minimum  
100 dB  
Dynamic range  
Channel selectivity  
70 dB @ > 500 Hz offset  
DSM 132/132RS Receiver User Guide 133  
                 
E
Specifications  
Table E.4  
Beacon Channels (continued)  
Frequency offset  
17 ppm maximum  
3rd order intercept  
+15 dBm @ RF input (min. AGC  
setting)  
Beacon acquisition time  
Operating modes  
<5 seconds, typical  
Auto Power, Auto Range, and Manual  
E.5  
L-Band Satellite Differential Correction Receiver  
Table E.5 lists the characteristics of the L-band satellite differential  
correction receiver with multiple vendor support.  
Table E.5  
L-Band satellite differential correction receiver with  
multiple vendor support characteristics  
-5  
Bit error rate  
10 for Eb/N of >5.5 dB  
Frequency band  
<5 seconds, typical  
1525–1560 MHz  
5 kHz  
Channel spacing  
E.6  
Receiver Default Settings  
Table E.6 lists the receiver default settings.  
Table E.6  
Receiver default settings  
DGPS Source  
Dynamics  
WAAS/EGNOS  
Land  
Minimum elevation  
AMU mask  
8°  
3
PDOP Mask  
13°  
PDOP 2D/3D switch  
PV Filter  
11  
D&S (Dynamic and Static mode)  
134 DSM 132/132RS Receiver User Guide  
             
Specifications  
E
Table E.6  
Receiver default settings (continued)  
C.C. Filter  
Enhanced  
DGPS mode  
Auto On/Off  
DGPS correction age limit 30 seconds  
Pos fix rate 1 Hz  
DSM 132/132RS Receiver User Guide 135  
E
Specifications  
136 DSM 132/132RS Receiver User Guide  
modes 71  
Index  
Windows CE with cigarette power  
L-band receiver 134  
A
accuracy of receiver 15  
AgRemote utility 40, 88  
altitude 20  
antenna  
connecting cable 30  
B
DGPS configuration 62  
DSM 132 53  
EZ Bcn 1 72  
mode 78  
Base Station Option firmware 73  
Base Stn Config menu 75, 78  
Base Stn Config screen 76, 78  
beacon  
Man Bcn Freqs 72  
satellite subscription service 64  
connecting  
antenna cable 30  
optional Windows CE cable 34  
optional Windows CE with cigarette  
power adaptor cable 34  
3rd order interception 134  
channel selectivity 133  
channel spacing 133  
dynamic range of 133  
 
Index  
environmental conditions for receiver 29  
ephemeris (satellite history) file 20  
technology 17, 82  
D
datum  
DGPS 19  
EZ Sat screen 64  
DGPS satellite 23  
Field Operations menu 54  
firmware  
additional options available 82  
Base Station Option 73  
configuring 53  
input (ASCII, TSIP, RTCM) 18  
overview 13, 14  
G/3D position type 48  
GPS error, sources of 19  
GPS Mode 86  
physical characteristics 132, 134  
receiver options 17  
GPS positions  
E
output format 22  
Edit Base Pos 77  
output of 21  
electrical interference, sources of 29  
elevation 20  
Elevation mask 86  
GRS message 112  
GSA message 113  
GST message 114  
138 DSM 132/132RS Receiver User Guide  
Index  
GSV message 115  
the receiver 28  
H
I
IALA (International Association of  
Lighthouse Authorities) 22  
II Talker ID 106  
input, ASCII, RTCM, TSIP 18  
installing the receiver/antenna  
environmental conditions 29  
K
RMC 117  
L
Language screen 55  
latitude 20  
LC Talker ID 106  
LG Talker ID 106  
location of receiver 27  
longitude 20  
sample structure 105  
selecting for output 60  
structure 104  
M
summary 107  
Man Bcn Freqs screen 72  
menu system  
symbols and delimiters 105  
Talker ID Codes 106  
time values 107  
VTG 119  
DSM 132 128  
Message Rate screen 62  
DSM 132/132RS Receiver User Guide 139  
Index  
NMEA1 screen 61  
PRC Interval screen 78  
PRC mode, setting 78  
PTNL 103  
PTNL,GGK message 124  
PTNLID message 122  
O
Omni*  
Srv Info screen 64, 88  
OmniSTAR  
activating 65  
OmniSTAR website 23  
output  
1 pps 18  
outputting  
2D autonomous positions 48  
RAIM  
P
for FlashLoader 100 83  
PDOP 20  
inputs 18  
location of 27  
mounting 28  
GPS channels 133  
physical characteristics  
combined antenna 132  
DSM 132 receivers 132  
pin-out diagrams  
dual interface cable 99  
Port A 98  
outputs 18  
position output formats 22  
position outputs 21  
receiver connections 18  
receiver enhancements 17  
Differential Base Station 17  
Port B 98  
140 DSM 132/132RS Receiver User Guide  
specifications 131  
receiving DGPS  
satellite 23  
reference position  
SRCH position type 48  
standard features 16  
status  
Status menu 54  
coordinates 76  
reference station 19  
rover 19, 75  
RTCM website 18  
S
T
satellite DGPS 23  
satellites  
activating 67  
configuring 64  
screens 42  
Time, Position, Position Type, and DOP  
Values 124  
configuration, PRC Interval screen 78  
Topographic Engineering Center website 21  
tracking satellites 48  
searching, for satellites 48  
selecting, NMEA messages for output 60  
Set From Averages 77  
Set From Here 76  
Trimble proprietary messages 103  
Trimble website 11  
troubleshooting 85  
Signal Strength Mask 86  
signal-to-noise ratio (SNR) 20, 49, 89  
software  
U
Units screen 55  
FlashLoader100 83  
DSM 132/132RS Receiver User Guide 141  
Index  
upgrade options  
websites  
EGNOS 23  
activating 81  
method, AgGPS 70 RDL 82  
method, AgRemote software 82  
National Geodetic Survey 21  
OmniSTAR 23  
RTCM 18  
UTC  
GRS sentence 112  
GST sentence 114  
Topographic Engineering Center 21  
Trimble 11  
WAAS 23  
V
XTE message 120  
W
WAAS website 23  
WAAS/EGNOS DGPS  
status information 49  
WAAS/EGNOS DGPS configuration 69  
WAAS/EGNOS T2 Remap screen 69  
142 DSM 132/132RS Receiver User Guide  

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