Rikaline E-705
GPS Receiver
User’s Guide
Oct. 06, 2002
Rikaline Marketing Corp.
4F-11, 26, Tai Yuen St., Chu Pei, Hsin Chu, Taiwan
Phone: +886-3-552-6001 Fax: +886-3-552-6002
All Right Reserved
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1. Introduction
1.1 Overview
The E-705 GPS Receiver integrated antenna is a total solution GPS receiver, designed based on EVERMORE
on-chip hardware tracking loops technique for use in a wide range of application. This positioning application
meets strict needs such as car navigation, mapping, surveying, security, agriculture and so on. Only clear view
of sky and certain power supply are necessary to the unit. It communicates with other electronic utilities via
compatible RS-232. With low power consumption, the E-705 tracks up to 12 satellites at a time, re-acquires
satellite signals in 100 ms and updates position data every second. The fast time-to-first-fix (TTFF) allows the
unit operates with low power consumption.
1.2 Features
The E-705 provides the following features:
1. Fast TTFF and low power consumption.
2. High performance receiver tracks up to 12 satellites.
3. Supports NMEA-0183 protocol.
4. Compact design ideal for applications requiring small space.
5. Optimized for navigation in urban-canyon environments.
6. Automatic cold start with no user initialization required.
7. Water resistance.
1.3 Technology specifications
1.3.1 Physical Dimension
Single construction integrated antenna/receiver.
Size: 46.0(W) x 31.0 (D) x 15.6(H) (mm)
1.81"(W) x 1.22"(D) x 0.61"(H).
1.3.2 Environmental Characteristics
1) Operating temperature: -20oC to +75oC(internal temperature).
2) Storage temperature: -55oC to +90oC.
1.3.3 Electrical Characteristics
1) Input voltage: +3.3 ~ 5.5 VDC.
2) Power consumption:
100mA w/o power saving
<80mA with power saving
1.3.4 Performance
1) Tracks up to 12 satellites.
2) Update rate: 1 second.
3) Acquisition time
Reacquisition
Interrupted Repositioning
Ephemeris update
0.1 sec., averaged
sec., averaged
40 sec., averaged
8
4) Position accuracy:
Position
Velocity
Time
5-25 meter CEP without SA
0.1 meters/second, without SA
1
microsecond synchronized GPS time
5) Dynamic Conditions:
Altitude 18,000 meters (60,000 feet) max
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Velocity
Acceleration
515 meters / second (1000 knots) max
4 G, max
1.3.5 Interfaces
1) PC interface: RS-232.
2) Baud rate: 4800/9600.
3) NMEA 0183 Version 2.2 ASCII output : GPGGA, GPGSA, GPGSV, GPRMC).
1.3.5 Coordinates System
1) WGS84.
4
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2. Operational Characteristics
2.1 Initialization
As soon as the initial self-test is complete, the E-705 begins the process of satellite acquisition and
tracking automatically. Under normal circumstances, it takes approximately 40 seconds to achieve a position fix,
15 seconds if ephemeris data is known. After a position fix has been calculated, information about valid position,
velocity and time is transmitted over the output channel.
The E-705 utilizes initial data, such as last stored position, date, time and satellite orbital data, to achieve
rapid GPS signal acquisition and fast TTFF. If significant inaccuracy exists in the initial data, or the orbital data
is obsolete, it may take more time to achieve a navigation solution or cold–start automatic-locate will be invoked.
However, acquisition performance can be improved significantly of the host initializes the E-705 with a rough
estimate of time and user position.
2.2 Navigation
After the acquisition process is complete, the E-705 sends valid navigation information over output
channels. These data include:
1) Latitude/longitude/altitude
2) Velocity
3) Date/time
4) Error estimates
5) Satellite and receiver status
The E-705 will perform 3D navigation when 4 or more satellites are tracked. When 3 or fewer satellites are
tracked, altitude-hold is enabled using the last computed altitude and 2D navigation mode is entered.
With signal blockage or rising and setting of the satellites, where a change in satellite constellation used for
position fix occurred, large position error may result. The E-705 incorporates a proprietary algorithm to
compensate the effect of satellite constellation change, and maintains an accurate smooth estimate of the
receiver’s position, velocity, and heading.
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3. Hardware interface
3.1 Dimension
46.0(W) x 31.0 (D) x 15.6(H) (mm)
1.81"(W) x 1.22"(D) x 0.61"(H).
3.2 Hardware Interface
The E-705 includes an antenna in a unique style water resistance gadget. Simply connect PS-2 female
connector to your notebook PC, PDA or other devices.
3.3 Connector
Standard cable: 2 meters with COM port and male PS-2 connectors.
3.3.1 Function definition of standard PS-2 composite connector
Pin
Signal
1
2
3
4
5
6
Tx (RS-232)
+5VDC
Tx (TTL)
Ground
1PPS
Rx (RS-232)
3.4 Accessories
3.4.1 A-6011 Mini Din Female and PS-2 male connector:
Cable Length: To E-705: 1 meter
RS-232 to PS-2: 45 cm
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3.4.1.1 Mini Din Female connector function definition:
Pin
1
Signal Name
N.C
2
3
Tx
Rx
4
N.C
5
6
Ground
N.C
7
N.C
8
N.C
9
DGPS in
N.C = No connection
3.4.1.2 PS2 composite connector function definition (to PC):
Pin
1
Signal Name
+5V
2
N.C
3
N.C
4
5
Ground
N.C
6
N.C
N.C = No connection
3.4.2 A-6012 Cigarette adapter and PDA connector:
Part No.
Application
ASUA
BESTA I-WINNA
HP Jornada
Siemens LOOX
Mitac Mio
Part No.
Application
Palm
I-Paq
Sony Series
Toshiba Series
O2-XDA / T-Mobile - MDA
A-6017-A
A-6017-B
A-6012-H
A-6017-L
A-6017-M
A-6017-N
A-6012-P
A-6012-Q
A-6012-S
A-6017-T
A-6017-X
NEC
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3.4.3 A-6013 USB connector
The function definition of the A Type USB connector is as follows:
Pin
1
2
Signal Name
+5V
D +
3
D -
4
Ground
3.4.4 A-6014 High power connector
Color
Black
Red
Green
White
Signal
Ground
+6~30 VDC
Tx
Rx
Orange
DGPS IN
3.4.5 A-6016 Cigarette Adapter
Input power: 12-26VDC
Cable Length: 2 meter core type
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4. USB Driver
4.1 System Requirements
IBM, Pentium or above and other compatible PC; 16 MB and above memory; Windows 98/Me/2000/XP; VGA
Graphic Adapter.
4.2 Installation
1. Copy entire <E-705 USB> folder from CD to hard disk.
2. Connect E-705 USB connector to computer. While the computer automatically starts the installation
program, please direct the driver to the <E-705 USB> folder.
3. After the installation is complete, go to <Device Manager> and select <Ports (COM & LPT)> to verify if a
virtual COM port <USB to Serial Port> was created.
4.3 Important
Verify the COM port # to start using your own navigating software.
1. Click <Start> menu, select <Settings>, then enter <Control Panel>.
2. After entering <Control Panel>, select <System>.
3. Select <Device Manager>.
4. Find the <Connect Port> and check the Virtual COM Port, which was created by the USB driver. Please
note that the Virtual COM Port number might be different from every computer. Before using navigating
software, please confirm the COM Port numbers created by your computer and provided by your navigation
software. They must be the same Com Port numbers. Otherwise, the navigating software won’t receive the
satellite signal for the un-match COM Port setting.
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5. Software Interface
The E-705 interface protocol is based on the National Marine Electronics Association's NMEA 0183 ASCⅡ
interface specification, which is defined in NMEA 0183, Version 2.2.
5.1 NMEA Transmitted Messages
The E-705 outputs data in NMEA-0183 format as defined by the National Marine Electronics Association
(NMEA), Standard.
The default communication parameters for NMEA output are 4800 baud, 8 data bits, stop bit, and no parity.
Table 5-1 NMEA-0183 Output Messages
NMEA Record
GPGGA
Description
Global positioning system fixed data
GNSS satellites in view
GPGSV
GPRMC
GPVTG
Recommended minimum specific GNSS data
Course over ground and ground speed
5.1.1 Global Positioning System Fix Data (GGA)
Out put time, position and position – fix related data.
Table 5-2 contains the values for the following example:
$GPGGA,161229.487,3723.2475,N,12158.3416,W,1,07,1.0,9.0,M, , , ,0000*18
Table 5-2 GGA Data Format
Name
Message ID
Example
$GPGGA
Units
Description
GGA protocol header
UTC Time
161229.487
Hhmmss.sss
Latitude
3723.2475
ddmm.mmmm
N/S Indicator
Longitude
N
N=north or S=south
dddmm.mmmm
12158.3416
E/W Indicator
Position Fix Indicator
Satellites Used
HDOP
MSL Altitude
Units of Altitude
Geoid Separation
Units
W
1
07
1.0
9.0
M
E=east or W=west
See Table 5-3
Range 0 to 12
Horizontal Dilution of Precision
Meters
Meters
Meters
Meters
second
M
Age of Diff. Corr.
Diff. Ref. Station ID
Checksum
Null fields when DGPS is not used
End of message termination
Description
0000
*18
<CR> <LF>
Table 5-3 Position Fix Indicator
Value
0
1
2
3
0 Fix not available or invalid
GPS SPS Mode, fix valid
Differential GPS, SPS Mode, fix valid
GPS PPS Mode, fix valid
Note: the NMEA checksum consists of a “*” and two hex digits representing exclusive-OR of all the
characters between, but not including, the “$” and “*” characters
10
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5.1.2 Geographic Position with Latitude/Longitude (GLL)
Table 5-4 contains the values for the following example:
$GPGLL,3723.2475,N,12158.3416,W,161229.487,A*2C
Table 5-4 GLL Data Format
Name
Message ID
Latitude
N/S Indicator
Longitude
E/W Indicator
UTC Position
Status
Example
$GPGLL
3723.2475
N
12158.3416
W
Units
Description
GLL protocol header
ddmm.mmmm
N=north or S=south
dddmm.mmmm
E=east or W=west
hhmmss.sss
161229.487
A
A=data valid or V=data not valid
Checksum
<CR> <LF>
*2C
End of message termination
5.1.3 GNSS DOP and Active Satellites (GSA)
Table 5-5 contains the values for the following example:
$GPGSA,A,3,07,02,26,27,09,04,15, , , , , ,1.8,1.0,1.5*33
Table 5-5 GSA Data Format
Name
Message ID
Mode 1
Example
$GPGSA
Units
Description
GSA protocol header
See Table 5-6
A
3
Mode 2
See Table 5-7
Satellite Used (1)
Satellite Used (1)
……
07
02
Sv on Channel 1
Sv on Channel 2
….
Satellite Used
PDOP
HDOP
VDOP
Checksum
<CR> <LF>
Sv on Channel 12
Position Dilution of Precision
Horizontal Dilution of Precision
Vertical Dilution of Precision
1.8
1.0
1.5
*33
End of message termination
(1) Satellite used in solution.
Table 5-6 Mode 1
Value
Description
M
A
Manual—forced to operate in 2D or 3D mode
2D Automatic—allowed to automatically switch 2D/3D
Table 5-7 Mode 2
Value
Description
1
2
3
Fix Not Available
2D
3D
5.1.4 GNSS Satellites in View (GSV)
Table 5-8 contains the values for the following example:
$GPGSV,2,1,07,07,79,048,42,02,51,062,43,26,36,256,42,27,27,138,42*71
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$GPGSV,2,2,07,09,23,313,42,04,19,159,41,15,12,041,42*41
Table 5-8 GSV Data Format
Name
Message ID
Example
$GPGSV
2
Units
Description
GSV protocol header
Range 1 to 3
Range 1 to 3
Range 1 to 12
Number of Messages
Message Number
Satellites in View
Satellite ID
Elevation
1
07
07
79
Channel 1 (Range 1 to 32)
degrees Channel 1 (Maximum 90)
Azimuth
SNR (C/No)
....
048
42
....
degrees Channel 1 (True, Range 0 to 359)
dBHz Range 0 to 99, null when not tracking
Satellite ID
Elevation
27
27
Channel 4 (Range 1 to 32)
degrees Channel 4 (Maximum 90)
Azimuth
138
42
*71
degrees Channel 4 (True, Range 0 to 359)
dBHz Range 0 to 99, null when not tracking
SNR (C/No)
Checksum
<CR> <LF>
End of message termination
NOTE: Items <4>,<5>,<6> and <7> repeat for each satellite in view to a maximum of four (4) satellites per
sentence. Additional satellites in view information must be sent in subsequent sentences. These fields will be
null if unused.
5.1.5 Recommended Minimum Specific GNSS Data (RMC)
Table 5-9 contains the values for the following example:
$GPRMC,161229.487,A,3723.2475,N,12158.3416,W,0.13,309.62,120598, ,*10
Table 5-9 RMC Data Format
Name
Message ID
UTC Time
Example
$GPRMC
161229.487
A
3723.2475
N
12158.3416
W
0.13
309.62
120598
Units
Description
RMC protocol header
hhmmss.sss
Status
Latitude
A=data valid or V=data not valid
ddmm.mmmm
N=north or S=south
dddmm.mmmm
N/S Indicator
Longitude
E/W Indicator
Speed Over Ground
Course Over Ground
Date
E=east or W=west
Knots
Degrees True
ddmmyy
Degrees E=east or W=west
Magnetic Variation
Checksum
*10
<CR> <LF>
End of message termination
5.1.6 Course Over Ground and Ground Speed (VTG)
Table 5-10 contains the values for the following example:
$GPVTG,309.62,T, ,M,0.13,N,0.2,K*6E
Table 5-10 VTG Data Format
Name
Message ID
Course
Reference
Course
Example
$GPVTG
309.62
T
Units
Description
VTG protocol header
Degrees Measured heading
True
Degrees Measured heading
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Reference
Speed
Units
Speed
M
0.13
N
0.2
K
Magnetic (1)
Measured horizontal speed
Knots
Measured horizontal speed
Kilometers per hour
Knots
Km/hr
Units
Checksum
<CR> <LF>
*6E
End of message termination
(1) All “course over ground” data are geodetic WGS84 directions.
5.1.7 Time & Date (ZDA)
Table 5-11 contains the values for the following example:
$GPVTG,114523.62,12,04,2001,10,34*6E
Table 5-11 zda Data Format
Name
Message ID
Hour, Min, Sec, Sub
Sec
Example
$GPZDA
Units
Description
ZDA protocol header
114523.62
Hhmmss.ss
Day
Month
Year
Local Zone Hours
12
04
2001
10
Day in UTC, 01to 12
Month in UTC, 01 to 12
Year in UTC
Local zone hours, +/- 13 hours
Local Zone Minutes
34
Local zone minutes, 0 to +59
Checksum
*6E
<CR> <LF>
End of message termination
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6. Ordering Information
6.1 Product Options
E-705 With COM Port connector
E-705-P with PS-2 femal connector
E-705-U With USB connector
6.2 Accessories
A-6011 Com Port connector (Standard, packed in color box)
A-6013 USB connector
A-6014 High power connector, 6-30VDC
A-6015 Magnetic pad
A-6016 Cigarette adapter
A-6012 / 6017 PDA connector with Cigarette Adapter
Part No.
PDA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
A-6017-A
A-6017-B
A-6012-C
A-6012-C1
A-6012-C2
A-6012-H
A-6012-HS
A-6012-HS1
A-6012-HS2
A-6017-L
A-6017-M
A-6017-N
A-6012-P
A-6012-P1
A-6012-Q
A-6012-Q1
A-6017-Q1
A-6012-S
A-6012-S1
A-6017-SM
A-6012-T1
A-6017-T2
A-6017-X
ASUS A-600
BESTA I-WINNA
Casio E-115
Casio E-125
Casio E-200
HP Jornada 565/568
HandSpring Treo
HandSpring Visor\Prism
HandSpring Edge
Siemens LOOX
Mitac Mio 528
NEC 300E
Palm Vx
Palm / IBM WorkPad 500/505
I-Paq 36xx
I-Paq 38xx
I-Paq 38xx
Sony N-7xx
Sony T-6xx
Siemens SX-45
Toshiba E-570
Toshiba E-330/740
O 2 – XDA / T-Mobiles – MDA
Remarks: A-6012 series is 500mA
A-6017 series is 2A
7. Warranty
The E-705 is warranted to be free from defects in material and functions for one year from the date of
purchase. Any failure of this product within this period under normal conditions will be replaced at no charge to
the customers.
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