EFJohnson Two Way Radio 002 9803 601 User Manual
LTR-Net™  
OPERATING  
MANUAL  
9800 Series  
Trunked Mobile Radio  
98x3/98x6  
LTR-NET™ Mobile  
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LAND MOBILE PRODUCT WARRANTY - The manufacturer’s  
warranty statement for this product is available from your product  
supplier or from EFJohnson, 299 Johnson Avenue, Box 1249,  
Waseca, MN 56093-0514. Phone (507) 835-6222.  
Copyright© 1999 by the E.F. Johnson Company  
E.F. Johnson Company, which was founded in 1923, designs, manu-  
factures, and markets radio communication products, systems, and  
services worldwide. E.F. Johnson produces equipment for land  
mobile radio and mobiletelephone services which include business,  
industrial, government, public safety, and personal users.  
Viking Head/EFJohnson logo, LTR-Net™, LTR®, and Call Guard®  
are trademarks of the E.F. Johnson Company. All other company  
and/or product names used in this manual are trademarks and/or  
registered trademarks of their respective manufacturer.  
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SAFETY INFORMATION  
SAFETY INFORMATION  
The FCC has adopted a safety standard for human exposure to  
RF energy. Proper operation of this radio under normal condi-  
tions results in user exposure to RF energy below the Occupa-  
tional Safety and Health Act and Federal Communication  
Commission limits.  
WARNING  
DO NOT allow the antenna to touch or come in very close prox-  
imity with the eyes, face, or any exposed body parts while the  
radio is transmitting.  
DO NOT operate the transmitter of a mobile radio when a person  
outside the vehicle is within one (1) meter of the antenna.  
DO NOT operate the transmitter of a stationary radio (base  
station or marine radio) when a person is within one (1) meter of  
the antenna.  
DO NOT operate the radio in explosive or flammable atmo-  
spheres. The transmitted radio energy could trigger blasting caps  
or cause an explosion.  
DO NOT operate the radio without the proper antenna installed.  
DO NOT allow children to operate or play with this radio.  
NOTE: The above warning list is not intended to include all  
hazards that may be encountered when using this radio.  
This device complies with Part 15 of the FCC rules. Operation is  
subject to the condition that this device does not cause harmful  
interference. In addition, changes or modifications to this equip-  
ment not expressly approved by EFJohnson could void the user’s  
authority to operate this equipment (FCC rules, 47CFR Part  
15.19).  
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SAFETY INFORMATION  
FCC EXPOSURE LIMITS  
This mobile radio transceiver was tested by the manufacturer  
with an appropriate antenna in order to verify compliance with  
Maximum Permissible Exposure (MPE) limits set under Section  
2.1091 of the FCC Rules and Regulations. The guidelines used in  
the evaluation are derived from Figure 1 (B) titled “Limits For  
General Population/Uncontrolled Exposure” which is from FCC  
report OET bulletin #65.  
Figure 1  
FCC Limits for Maximum Permissible Exposure (MPE)  
(A) Limits For Occupational/Controlled Exposure  
Electric Field MagneticField Power Density Averaging  
Frequency Range  
(MHz)  
2,  
2
Strength (E) Strength (H)  
(V/m) (A/m)  
(S)  
Time |E| |H| ,  
2
(mW/cm2 ) S (minutes)  
0.3-3.0  
614 1.63  
(100)*  
6
6
6
6
6
2
3.0-30  
1842/f  
61.4  
--  
4.89/f  
0.163  
--  
(900/f )*  
1.0  
30-300  
300-1500  
1500-100,000  
f/300  
5
--  
--  
(B) Limits For General Population/Uncontrolled Exposure  
Electric Field MagneticField Power Density Averaging  
Frequency Range  
(MHz)  
2,  
2
Strength (E) Strength (H)  
(V/m) (A/m)  
(S)  
Time |E| |H| ,  
2
(mW/cm2 ) S (minutes)  
0.3-1.34  
614 1.63  
(100)*  
30  
30  
30  
30  
30  
2
1.34-30  
824/f  
27.5  
--  
2.19/f  
0.073  
--  
(180/f )*  
0.2  
30-300  
300-1500  
1500-100,000  
f/1500  
1.0  
--  
--  
f = Frequency in MHz  
*Plane-wave equivalent power density  
5
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SAFETY INFORMATION  
Figure 2 lists the antenna whips and bases recommended for  
use in each frequency range. Each model of this radio was tested  
with the appropriate antenna listed. The antenna was mounted in the  
center of the roof of a domestic manufactured 4-door passenger  
sedan. The radio manufacturer has determined that the user and  
service personnel should remain one (1) meter in distance away  
from the antenna when transmitting. By maintaining this distance,  
these individuals are not exposed to radio frequency energy or  
magnetic fields in excess of the guidelines set forth in Figure 1.  
NOTE: If the installer or user changes the type or location of the  
antenna, they should be aware of the MPE guidelines shown in  
Figure 1 and take measures to comply with those guidelines.  
Figure 2  
Recommended Antenna Whips and Bases  
(Antenna Manufacturer - Antenna Specialists)  
Frequency  
Whip Model No.  
Base Model No.  
136-144 MHz  
144-152 MHz  
152-162 MHz  
162-174 MHz  
400-430 MHz  
430-470 MHz  
470--512 MHz  
806-869 MHz  
890-960 MHz  
ASPJ1415  
ASPA1415  
ASPB1415  
ASPC1415  
ASPE1615  
ASPD1615  
ASPF1615  
ASPA1855  
ASPG1865  
KM220  
KM220  
KM220  
KM220  
KM220  
KM220  
KM220  
KM220  
KM220  
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TABLE OF CONTENTS  
TABLE OF CONTENTS  
SAFETY INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4  
QUICK REFERENCE GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9  
FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10  
General Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10  
LTR-Net Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10  
LTR Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10  
Conventional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10  
CONTROLS AND DISPLAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11  
Front Panel Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11  
Rear Panel Jacks and Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . .13  
Display Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
GENERAL OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15  
Power-Up Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15  
Determining Volume Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15  
Backlight Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16  
System/Group Display Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16  
Selecting the System and Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17  
Setting Squelch Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18  
Microphone Off-Hook Detect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18  
LTR-Net, LTR, and Conventional Operation . . . . . . . . . . . . . . . . . . .19  
GENERAL FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20  
Bank Select. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20  
Call Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21  
Emergency Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21  
Encryption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21  
Function (FCN) Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22  
Home System/Group Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22  
Horn Alert. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23  
Option Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24  
Power Turn-Off Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24  
Proceed (Clear-To-Talk) Tone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25  
Receive-Only Groups. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25  
Stealth Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26  
Time-Out Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26  
Tone Select. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26  
Transmitter Thermal Foldback. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27  
STANDARD GROUP CALLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27  
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27  
Placing a Standard Group Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27  
Receiving a Standard Group Call. . . . . . . . . . . . . . . . . . . . . . . . . . . . .29  
TELEPHONE CALLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29  
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29  
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TABLE OF CONTENTS  
Placing Telephone Calls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29  
Receiving a Telephone Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30  
Landside-Originate Telephone Calls . . . . . . . . . . . . . . . . . . . . . . . . . .31  
LTR-NET AUXILIARY CALLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31  
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31  
Placing LTR-Net Auxiliary Calls. . . . . . . . . . . . . . . . . . . . . . . . . . . . .32  
Receiving Auxiliary Calls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32  
OPTION SWITCHES AND MENU MODE . . . . . . . . . . . . . . . . . . . . .33  
Option Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33  
Menu Mode Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33  
Using Menu Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35  
SYSTEM AND GROUP SCANNING . . . . . . . . . . . . . . . . . . . . . . . . . .35  
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35  
Scan List Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38  
Scan Delay and Continue Timers. . . . . . . . . . . . . . . . . . . . . . . . . . . . .39  
Transmitting In The Scan Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39  
LTR-NET AND LTR FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40  
Transmit Inhibit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40  
Calls on Priority ID Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41  
Telephone Group Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41  
LTR-NET FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42  
LTR-Net Standard and Special Calls . . . . . . . . . . . . . . . . . . . . . . . . . .42  
Busy Queuing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42  
Roaming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43  
LTR FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44  
Standard Group Calls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44  
Telephone Calls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44  
CONVENTIONAL FEATURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44  
Monitoring Before Transmitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44  
Transmit Disable On Busy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46  
Talk-Around . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46  
Call Guard Squelch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47  
MISCELLANEOUS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47  
Supervisory Tones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47  
LTR-Net Special Call Tones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49  
LTR Telephone Call Tones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49  
Display Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50  
Menu Mode Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52  
System Operator Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53  
Speaking Into Microphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53  
Operation At Extended Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54  
Preventing Battery Discharge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54  
Licensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54  
Transceiver Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55  
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QUICK REFERENCE GUIDE  
QUICK REFERENCE GUIDE  
System Scan  
List  
Encrypt  
Group Scan  
List  
Red - Transmit  
Amber - Transmit (Reduced Pwr)  
Green - Busy Conv. Group (Channel)  
Horn Monitor  
Select Switch  
(Press/Rotate)  
On-Off/Volume  
(Press/Rotate)  
Phone/  
Aux Call  
Call  
Scan Option  
Power On/Off - Press on-off /volume control.  
Set Volume Level - Rotate on-off/volume control.  
Change System or Group - Press Select switch to enable system or  
group select mode (indicated by ←/→ or __). Then rotate Select  
switch to select desired system or group (see page 17).  
Select Menu Mode - Press FCN twice or Menu switch and then  
rotate/press Select switch as required to display/select desired  
parameter (see page 33).  
Select Home System/Group - Press FCN then Select sw. or HOME  
Scan On/Off - Press SCAN switch. Scan on =  
, Scanning  
occurring = scrolling underline (see page 35).  
Program System or Group Scan List - Press Select switch to enable  
system or group select mode (same as when changing system or  
group), then press A/D switch. System in list =  
list = (see page 38).  
, Group in  
Set Squelch Level (Conv. Only) - Press FCN then rotate Select  
switch with conventional system selected (see page 18).  
Monitor Before Transmitting (Conv. Only) - Take microphone off-  
hook to enable monitor mode (indicated by ). Channel is busy  
if indicator is green or someone is talking (see page 44).  
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FEATURES  
FEATURES  
General Features  
• Up to approximately 99 systems with up to 99 groups each  
• LTR-Net™, LTR®, and conventional operation  
• Unique 8-character system and group identification tags  
• System and group scan  
• User programmable system and group scan lists  
• Menu mode to control various functions  
• Five programmable option switches  
• Up to 16 banks selectable  
• Proceed (clear-to-talk) tone  
• Call indicator  
• Horn alert  
• Emergency quick select switch  
• Companding (optional)  
• Encryption (optional)  
• Receive-only groups  
LTR-Net Features  
• Roaming (automatic locality search)  
• Standard (mobile-to-mobile) calls  
• Special calls including telephone, unique ID, and directed group  
• Busy queuing of special calls by radio system  
• Transmit inhibit  
• Receive priority calls  
LTR Features  
• Standard and telephone calls  
• Transmit inhibit  
• Receive priority calls  
Conventional Features  
• Busy indicator  
• Talk-around  
• User-adjustable squelch level  
• Call Guard® squelch control  
• Transmit disable on busy  
NOTE: System operator programming determines the availability of many  
of the preceding features.  
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CONTROLS AND DISPLAY  
CONTROLS AND DISPLAY  
Transmit/Busy  
Option Switches  
Speaker  
Indicator  
Microphone  
Jack  
On-Off/Volume  
Select Switch  
Front Panel Controls  
On-Off Volume - Pressing this knob turns power on and off. The  
vehicle ignition switch may also control power as described in  
“Power Turn-Off Delay” on page 24. Rotating this knob sets the  
speaker volume (see page 15).  
Select Switch - This switch changes the selected system or group and  
is also used for other functions such as selecting parameters in the  
menu mode. To change the system or group, press this knob to switch  
between the system and group select modes, and then rotate it to  
increase or decrease the system or group. Refer to “Selecting the  
System and Group” on page 17 and the FCN switch description which  
follows for more information.  
Option Switches - The five front panel option switches can be  
programmed by your system operator to control the functions which  
follow. Refer to the section indicated for more information. The  
keycap usually indicates the function controlled by the switch.  
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CONTROLS AND DISPLAY  
A/D - Scan list add/delete (see page 38)  
BANK - Bank select (see page 20)  
EMER - Emergency switch (see page 21)  
ENCPT - Encryption select (see page 21)  
FCN - Function select (see following description)  
HOME - Select home system/group (see page 22)  
(Menu) - Menu mode select (see page 33)  
AUX - Option select (see page 24)  
ROAM - Roam on-off (see page 43)  
SCAN - Scan on-off (see page 35)  
TEL - Selects telephone group (see “Tel Grp Select” on page 41)  
(Blank) - Not used (disabled) or one of above functions  
FCN (Function) Switch - This switch, if programmed, selects the  
following functions:  
Menu Mode Select - Press FCN twice (see page 33)  
Home Sys/Grp Select - FCN/press Select switch (see page 22)  
Conv Squelch Set - FCN/rotate Select switch (see page 18)  
Transmit/Busy Indicator - Indicates the following conditions:  
Red - Transmitter keyed, normal power output  
Orange - Transmitter keyed, power reduced because internal  
temperature is high (see page 27).  
Green - Busy conventional group (channel). Refer to “Monitoring  
Before Transmitting” on page 44 for more information.  
Microphone Jack - Connection point for the microphone.  
Microphone Push-To-Talk (PTT) Switch (Not Shown) - Push-  
button on the microphone which is pressed to key the transmitter.  
Speaker - The internal speaker is located behind the grille. An  
optional speaker can be connected to the external speaker jack located  
on the back (see “Speaker Jack” which follows).  
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CONTROLS AND DISPLAY  
Power  
Jack  
Antenna  
Jack  
Speaker  
Jack  
Rear Panel Jacks and Connectors  
Antenna Jack - Miniature UHF jack for connecting the 50-ohm  
antenna.  
Power Jack - Connection point for the power cable which attaches to  
the vehicle battery. A nominal 12-volt DC, negative ground power  
source is required.  
Speaker Jack - Connection point for an optional external 4.7-ohm,  
5-watt speaker. The internal speaker is automatically disabled when a  
speaker is plugged into this jack.  
Accessory Cable (Not Shown) - This optional cable is used to  
connect functions such as ignition switch sense to the transceiver.  
13  
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CONTROLS AND DISPLAY  
Phone/  
UID Grp  
Group Scan  
List  
System Scan  
List  
Scan  
Call  
16-Character  
Encryption Horn Alert  
Option  
Monitor  
Message Area  
Display Description  
16-Character Message Area - Indicates the selected system and  
group (see page 16) and also error conditions and status information.  
- Indicates that the displayed system is in the scan list and  
scanned normally (see page 38).  
- Indicates that the displayed group is in the scan list and  
scanned normally (see page 38).  
- Indicates that the selected group is programmed for telephone  
calls. With LTR-Net operation, it also indicates that the group is  
programmed for Auxiliary calls (see page 42).  
- Indicates that optional encryption is enabled (see page 21).  
- Indicates that the horn alert is enabled (see page 23).  
- Indicates that scanning is enabled (see page 35).  
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GENERAL OPERATION  
- Indicates that an option controlled by the AUX switch or  
OPTION menu parameter is enabled (see page 24).  
- Indicates that a call has been received on a group programmed  
for a call indicator (see page 21). To turn this indication off, press  
any key.  
- Indicates that the monitor mode is enabled. This mode disables  
Call Guard squelch and other squelch control features so that all  
messages are heard on conventional systems (see page 44).  
GENERAL OPERATION  
Power-Up Sequence  
When power is turned on, the backlight turns on, all segments  
in the display are momentarily enabled, and the last seven digits of  
the transceiver part number are very briefly displayed. A beep then  
sounds (if tones are enabled) and the transceiver is operational.  
Determining Volume Level  
The relative volume setting can be determined by noting the  
position of the index on the volume knob. You may also be able to  
enable a reference tone or background noise for use in setting the  
volume. Proceed as follows:  
• If key press tones are enabled, a short tone sounds when an option  
switch is pressed or the Select switch is pressed or rotated.  
• If a conventional system is selected, take the microphone off-hook  
and if someone is using the channel, voice is heard. If no one is  
using the channel, the squelch control can be adjusted counter-  
clockwise as described in “Setting Squelch Control” on page 18  
and noise is heard. It is not possible to unsquelch the transceiver  
in this manner when an LTR-Net or LTR system is selected.  
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GENERAL OPERATION  
Backlight Operation  
The display and keypad backlight can be controlled by the  
BACKLGT menu parameter (see page 33). The three states that can be  
selected are Bright, Dim, and Off. If this menu parameter is not select-  
able, the backlight is fixed in one of these states by programming.  
System/Group Display Modes  
The selected system and group are displayed using either a  
Numeric or Alpha display mode. The display mode is selectable if  
the S/G DISPL menu parameter is available (see page 33). Other-  
wise, it is fixed in one of these modes by programming.  
Numeric Mode - In this mode the selected system and group  
numbers are displayed on the top line as Sxx and Gxx, and the group  
alpha tag is displayed on the bottom line. For example, System 1,  
Group 1 (CAR 220) is displayed as follows. The system alpha tag is  
not displayed in this mode.  
System Number  
Group Number  
Group Alpha Tag  
Numeric Display Mode  
Alpha Mode - In the alpha mode, the system alpha tag is displayed  
on the top line and the group alpha tag is displayed on the bottom  
line. For example, a “SECURITY” system and “CAR 220” group  
are displayed as follows. The system and group numbers are not  
displayed in this mode.  
System Alpha Tag  
Group Alpha Tag  
Alpha Display Mode  
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GENERAL OPERATION  
Selecting the System and Group  
The front panel Select switch is used to change the system and  
group. Pressing this switch toggles between the system and group  
select modes, and rotating it increases or decreases the system or  
group.  
In the Numeric display mode (see preceding description), the  
system select mode is indicated when the arrow points to “Sxx”, and  
the group select mode is indicated when it points to “Gxx” (see  
following illustration).  
System Select  
Mode  
Group Select  
Mode  
Select Mode Indication With Numeric Display  
In the Alpha Tag display mode, the system select mode is indi-  
cated by an underline in the left-most character position of the  
system alpha tag. Likewise, the group select mode is indicated by an  
underline in the left-most position of the group alpha tag (see  
following illustration).  
System Select  
Mode  
Group Select  
Mode  
Select Mode Indication With Alpha Tag Display  
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GENERAL OPERATION  
The current mode remains selected until the menu mode is  
selected or transceiver power is cycled. The programmed default  
mode is then selected if applicable.  
Setting Squelch Control  
NOTE: This sets the squelch level used for conventional calls. The  
squelch level for LTR-Net and LTR calls is preset and not affected by  
this adjustment. For more information on operating modes, refer to  
page 19.  
If conventional systems are programmed, the squelch level can  
be set if the FCN option switch is enabled. Proceed as follows:  
1. Select a conventional system and a group that is not busy. Take the  
microphone off-hook to enable monitoring.  
2. Press the FCN switch and then rotate the Select switch as you  
would a normal squelch control. Rotate it counterclockwise until  
receiver noise is heard and then clockwise slightly past the point  
where the noise mutes. The squelch adjust mode is indicated by  
“SQUELCH” on the upper line of the display, and the relative  
squelch level is indicated by a bar graph on the bottom line.  
3. To select the current level and exit this mode, press the Select  
switch. This also occurs automatically 2 seconds after no change  
is made or 8 seconds after no activity.  
4. If both narrow and wide band channels are used, perform this  
adjustment on both types because separate settings are maintained.  
NOTE: Some readjustment may be required if weak messages are  
not heard or unsquelching occurs when no messages are present.  
Microphone Off-Hook Detect  
Microphone off-hook detection can be disabled by program-  
ming. Taking the microphone off-hook then does not disable scan-  
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GENERAL OPERATION  
ning (see page 35) or enable conventional channel monitoring (see  
page 44).  
LTR-Net, LTR, and Conventional Operation  
Introduction  
Each selectable system can be programmed for LTR-Net, LTR,  
or conventional operation. The type of operation that is programmed  
is determined by the radio equipment being used by your system  
operator. There are only a few differences in operation that are of  
concern to the user. These differences are described in the following  
information and also noted elsewhere in this manual as required.  
LTR-Net and LTR Operation  
The LTR-Net and LTR modes provide automatic channel selec-  
tion and monitoring before transmitting. Special tones and display  
messages indicate busy and out-of-range conditions, and telephone  
calls can be placed almost as conveniently as with your home  
telephone.  
Selecting a system selects a collection of up to 99 groups, and  
selecting one of these groups selects an ID code which determines  
the type of call (standard group, telephone, or special). In addition,  
with standard group calls, it determines the specific mobile or  
mobiles being called and what calls are received. Priority groups  
may also be programmed which allow additional calls to be received  
(see page 41).  
The LTR-Net operating mode provides the most operating  
features. Exclusive LTR-Net features include roaming and auxiliary  
calls such as Unique ID and Directed Group. Calls can be made to  
mobiles in your site or some other site. LTR-Net and LTR features  
are described starting on page 40.  
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GENERAL FEATURES  
Conventional Operation  
In the conventional mode, selecting a system selects a specific  
radio channel, and selecting a group selects the special Call Guard  
squelch coding (if used) and other unique channel parameters such  
as call indicator operation. The Call Guard coding determines the  
mobile or group of mobiles being called and also the mobiles from  
which calls are received (see “Call Guard Squelch” on page 47).  
In the conventional mode, a busy condition is detected automat-  
ically if the Transmit Disable On Busy feature is used. Otherwise, it  
must be detected manually as described in “Monitoring Before  
Transmitting” on page 44. Busy and no access conditions cannot be  
detected with conventional signaling, so are not indicated by special  
tones or display messages. Refer to “Operation At Extended Range”  
on page 54 for information on how to determine if an out-of-range  
condition may exist.  
GENERAL FEATURES  
Bank Select  
A bank is a collection of selectable systems that have been set  
up for a specific application. For example, one bank could be  
programmed for operation in Minneapolis and another for operation  
in Milwaukee. Each bank is identified by a unique alpha tag, and up  
to sixteen banks can be programmed.  
Banks are selected by the BANK SEL menu parameter or  
BANK option switch. In the menu mode (see page 33), rotate the  
Select switch to display “BANK SEL” on the top line and the  
current bank is then displayed on the bottom line. Press the Select  
switch to change the bank. If using the option switch, when “BANK  
SEL” is displayed on the top line, simply press the Select switch to  
select the desired bank. If neither the menu parameter nor the option  
switch is available, banks are not selectable.  
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GENERAL FEATURES  
Call Indicator  
The call indicator is “C” in the upper part of the display (see  
following illustration). The purpose of this indication is to show that  
a call was received while you were away from the vehicle. Indi-  
vidual groups can be programmed for this feature and it then turns  
on when a call is received on one of those groups.  
Call  
Indicator  
This indicator is turned off by pressing any button or cycling  
transceiver power. If scanning and the “Last Received” configura-  
tion is programmed (see “Transmitting In The Scan Mode” on  
page 39), the system and group of the last call are displayed. Other-  
wise, the currently selected system/group is displayed.  
Emergency Switch  
If the EMER option switch is programmed (see page 33), it is  
used to quickly select the emergency system/group that has been  
programmed in the current bank. The emergency call must then be  
manually transmitted by pressing the PTT switch (automatic trans-  
missions do not occur). Scanning continues if it is enabled, and calls  
are received normally on other systems and groups if applicable.  
Encryption  
Encryption is an optional feature that prevents conversations  
from being monitored by casual eavesdropping and analog  
scanners. It does this by encrypting your voice so that it can be  
understood only by someone using a transceiver equipped with a  
similar encryption device.  
Encryption is enabled and disabled by the ENCRYPT menu  
parameter or ENCPT option switch (see page 33). If this menu  
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GENERAL FEATURES  
parameter or option switch is not available, encryption may be fixed  
in the enabled mode by programming. When encryption is enabled,  
is indicated in the upper part of the display (see page 14).  
To transmit an encrypted call, encryption must be enabled as  
just described and the selected group must be programmed for  
encryption. Encrypted calls are always received regardless of the  
currently selected encryption mode and group programming (if the  
radio is equipped with encryption). When transmitting an encrypted  
call, wait approximately 1 second before speaking. This gives the  
receiving transceiver time to establish synchronization which  
ensures that all of the first word is received. If the proceed tone is  
used and an encrypted call is transmitted, two beeps instead of one  
sound and the tone is automatically delayed for the required time.  
Function (FCN) Switch  
If an option switch is programmed for FCN (function), it selects  
the following features. When the function select mode is active,  
“FCN” is displayed on the lower line of the display. This mode is  
automatically exited 2 seconds after a change is made or 8 seconds  
after no activity.  
Menu Mode Select - Pressing FCN twice or the Menu option switch  
selects the menu mode as described on page 33.  
Home System/Group Select - Pressing FCN and then the Select  
switch or the HOME option switch selects the home system/group as  
described in the next section.  
Squelch Adjust - Pressing FCN and then rotating the Select switch  
with a conventional system selected sets the squelch level as  
described on page 18.  
Home System/Group Select  
To select the preprogrammed Home system/group, simply press  
the FCN switch and then the Select switch. Alternatively, press the  
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GENERAL FEATURES  
HOME option switch if it is programmed. The Home system/group  
is then displayed and it becomes the selected system/group. If no  
home system/group or FCN or HOME option switch has been  
programmed, this function is not available. A different home system/  
group can be programmed for each bank.  
Horn Alert  
NOTE: The horn alert feature is not be available with some early  
models.  
If this feature has been installed by your system operator, it  
activates an external alert such as the vehicle horn or lights when a  
call is received on a group programmed for horn alert. When the  
horn alert is enabled,  
illustration.  
is displayed as shown in the following  
Horn Alert  
Enabled  
When enabled, the horn alert pulses on and off for 1-8 cycles  
and then goes back to the disabled state. To change the currently  
selected horn alert mode, the HRN ALRT menu parameter can be  
used if available (see page 33).  
The horn alert is programmed to operate in the manual or auto-  
matic mode (see descriptions which follow). If the ignition switch  
does not control transceiver power, only the front panel power  
switch affects operation when applicable. Refer to “Power Turn-Off  
Delay” on page 24 for more information.  
Manual Off/On Mode  
The horn alert mode does not change when power is turned on  
and off by either the ignition switch or power switch. Therefore, the  
horn alert is entirely controlled by the HRN ALRT menu parameter.  
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GENERAL FEATURES  
Auto Off/On Mode  
Ignition Switch - The horn alert always turns off when the ignition  
switch is turned on, and always turns on when the ignition switch is  
turned off (if there is a turn-off delay).  
Power Switch - The horn alert always reverts to the off condition  
when power is turned on by the power switch.  
NOTE: The preceding automatic operation overrides any mode that  
may have been selected by the HRN ALRT menu parameter.  
Option Select  
The AUX switch or OPTION menu parameter can be used to  
control an accessory that may have been installed by your system  
operator. The enabled condition is indicated by  
in the display.  
Power Turn-Off Delay  
Your transceiver may have been installed so that the vehicle  
ignition switch as well as the front-panel power switch control trans-  
ceiver power. If this is the case, both the ignition switch and the  
front panel power switch must be on for transceiver power to turn  
on.  
When the ignition switch controls power, turn-off delays of  
Immediate, 10, 20, 30, 40, or 50 minutes, 1, 2, 4, 8, 10, 12, or 16  
hours or Forever can be programmed. The delay can be overridden  
at any time by turning power off using the front-panel power switch  
or turning the ignition switch back on.  
A power turn-off delay allows features such as the call indicator  
to remain active for a time after the ignition switch is turned off. At  
the same time, advantages of ignition switch control are utilized  
such as preventing battery discharge that may occur if the trans-  
ceiver is accidentally left on for an extended period (see page 54).  
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GENERAL FEATURES  
Proceed (Clear-To-Talk) Tone  
This is a short tone that sounds shortly after the PTT switch is  
pressed to indicate that the radio system has been accessed and  
speaking can begin. The transceiver can be programmed so that this  
tone sounds on LTR-Net and LTR systems but not conventional  
systems. In addition, this and other tones can be disabled on all  
systems by the TONES menu parameter (see “Tone Select” on  
page 26) or system operator programming.  
On LTR-Net and LTR systems, if the radio system is busy when  
making a call, the busy tone sounds instead of the proceed tone and  
“BUSY” is indicated on the bottom line of the display. If an access  
attempt is unsuccessful, such as because of an out-of-range condi-  
tion, the intercept tone sounds and “NO ACCES” is indicated in the  
display. When the “NO ACCES” condition, the PTT switch must be  
released to make another call attempt. Refer to page 47 for more  
information on the busy and intercept tones.  
On conventional systems, the Transmit Disable On Busy  
feature can be used to automatically perform monitoring (see  
page 46). The proceed tone then does not sound if the channel is  
busy. Otherwise, the proceed tone (if enabled) sounds on conven-  
tional systems even if the channel is busy. If encryption is used, two  
tones sound instead of one to indicate that an encrypted call is being  
transmitted. With other calls, a standard (single beep) or distinctive  
(3-beep) tone may be used. With special and telephone calls, the  
proceed tone may sound on only the initial access.  
Receive-Only Groups  
Any group can be programmed for monitoring only (transmit-  
ting is disabled). If the PTT switch is pressed with one of these  
groups selected, the intercept tone sounds and “TX DISBL” is  
displayed.  
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GENERAL FEATURES  
Stealth Mode  
The stealth mode disables the following tones and indicators so  
that they do not reveal that you are transmitting or otherwise indicate  
your presence. The speaker audio and display remain enabled in this  
mode.  
• All tones (see “Tone Select” on page 26)  
• The front panel transmit/busy indicator (see page 11)  
• Display backlight  
The stealth mode can be selected by the STEALTH menu  
parameter (see page 33), or is fixed in the on or off mode by  
programming. There is no special indication that this mode is  
selected except that “On” is displayed under “STEALTH” when it is  
selected by the menu mode.  
Time-Out Timer  
The time-out timer disables the transmitter if it is keyed contin-  
uously for longer than the programmed time. It can be programmed  
for 0.5 - 5.0 minutes or disabled entirely. If the transmitter is keyed  
continuously for longer than the programmed time, the transmitter is  
disabled, “TIMEOUT” is indicated on the lower line of the display,  
and the intercept tone sounds. The timer and tone are reset by  
releasing the PTT switch.  
One use of the time-out timer feature is to prevent a repeater  
from being kept busy for an extended period by an accidentally  
keyed transmitter. It can also prevent possible damage to the trans-  
mitter caused by transmitting for an excessively long period.  
Tone Select  
If the TONES menu parameter is selectable, the tones that  
sound can be selected. Otherwise, the tones that sound are fixed by  
programming. The following choices are available. Refer to page 33  
for more information on using the menu mode.  
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STANDARD GROUP CALLS  
Silent - All tones are disabled.  
Keys - Only the Select switch and key press tones are enabled.  
Alerts - All tones except the preceding Key Beep tones are enabled.  
All - Both the Key Beep and Alert tones are enabled.  
Transmitter Thermal Foldback  
If the transmitter temperature increases to the point where  
damage to the transceiver could result, power is automatically cut  
back. When this happens, the transmit indicator on the front panel is  
orange instead of red when the transmitter is keyed. After sufficient  
cooling occurs, power output automatically returns to the normal  
level and the indicator changes back to red. One time when this indi-  
cation could occur is if you transmit for an extended period.  
STANDARD GROUP CALLS  
General  
Most calls you make are probably the standard group type  
described in this section. These calls are between you and another  
mobile or control station. The main difference between these calls  
and the other types that can be placed is that no number is dialed  
using a keypad. The following procedure applies to all three types of  
operation (LTR-Net, LTR, and conventional).  
Placing a Standard Group Call  
1. Turn transceiver power on and set the volume as described starting  
on page 15. With conventional operation, also make sure that the  
squelch is properly set as described on page 18.  
2. Select the system and group of the mobile being called as  
described starting on page 17.  
3. If a conventional call is being placed, monitor the channel  
manually or automatically as described on page 44.  
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STANDARD GROUP CALLS  
4. Press (and hold) the microphone PTT (push-to-talk) switch to talk  
and release it to listen. Operation with LTR-Net, LTR, and conven-  
tional calls is as follows:  
LTR-Net and LTR Operation  
• If the proceed tone is enabled (see page 25), it sounds shortly  
after the PTT switch is pressed if the radio system was success-  
fully accessed. If it is not enabled, no tone sounds when the  
system is successfully accessed. The proceed and other tones  
can be disabled as described in “Tone Select” on page 26.  
• If the radio system is busy, the busy tone sounds (see page 47)  
and “BUSY” is indicated on the lower line of the display. Addi-  
tional access attempts are made as long as the PTT switch  
remains pressed.  
• If the radio system could not be accessed because of an out-of-  
range condition or some other reason, the intercept tone sounds  
(see page 48) and “NO ACCES” is indicated on the lower line  
of the display. The PTT switch must then be released and  
pressed again to make another access attempt.  
• When responding, busy or no access conditions may also occur  
the same as when placing a call because the system is  
re-accessed for each transmission with these calls.  
Conventional Operation  
• If the channel is busy and the Transmit Disable On Busy feature  
is programmed (see page 46), “DSBL BSY” is indicated on the  
lower line of the display and the transmitter is disabled. Any  
channel activity is heard while the PTT switch is pressed.  
• Otherwise, busy and out-of-range conditions are not indicated  
and speaking can begin when the PTT switch is pressed (if the  
channel is not busy). If the proceed tone is enabled on conven-  
tional systems, it indicates when speaking can begin but does  
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TELEPHONE CALLS  
not indicate that the radio system has been successfully  
accessed.  
5. When the call is complete, place the microphone back on-hook.  
Receiving a Standard Group Call  
1. Select or scan the system and group programmed for the call you  
want to receive (see page 35 for scan information).  
2. When the message is received, the display usually changes to the  
system and group of the call. Take the microphone off-hook and  
press the PTT switch to talk and release it to listen. If scanning, a  
response may not automatically occur on the group of the call.  
Refer to “Transmitting In The Scan Mode” on page 39 for more  
information.  
TELEPHONE CALLS  
General  
NOTE: Telephone calls can be placed and received only if that  
service is available to you and your transceiver has been  
programmed appropriately. In addition, a microphone equipped with  
a telephone keypad is required to dial the telephone number.  
The telephone calling feature allows you to place and receive  
telephone calls using your transceiver. The following information  
describes how these calls are made with LTR-Net and LTR opera-  
tion. If you can make telephone calls with conventional operation,  
the procedure may be somewhat different and your system operator  
will then provide additional information. Proceed as follows:  
Placing Telephone Calls  
1. Turn transceiver power on and set the volume as described starting  
on page 15. Select the group programmed for telephone calls. To  
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TELEPHONE CALLS  
quickly select the telephone group in the current system, press the  
TEL option switch as described on page 41. When a group  
programmed for telephone calls is selected,  
is displayed.  
2. To obtain the dial tone, briefly press the PTT switch. If the proceed  
tone is used (see page 25), press the PTT switch until this tone  
sounds. If a dial tone is then heard, proceed to step 4. Busy or no  
access conditions may also be indicated the same as described for  
standard group calls on page 28.  
3. With the dial tone sounding, dial the number using the 0-9 keys on  
the microphone keypad. If the microphone has a memory, you may  
also be able to recall the number from memory. The PTT switch  
does not need to be pressed while dialing if the transmitter auto-  
matically keys. If too much time elapses between digits, the call is  
terminated.  
4. After the number is dialed, release the PTT switch (if it was  
pressed). With LTR-Net operation, a short tone then sounds to  
indicate that the number was accepted by the system. Landside  
ringing (or a landside busy condition) should then be heard.  
5. When the other party answers, press the PTT switch and respond.  
The PTT switch must be pressed to talk and released to listen the  
same as with mobile-to-mobile calls.  
6. When the call is finished, it should be terminated. This is usually  
done by transmitting either the # or X # characters, and termina-  
tion is indicated by three beeps. Terminating the call in this  
manner prevents extra billing that may occur while the system  
automatically detects the end of the call.  
Receiving a Telephone Call  
1. Select or scan the system and group programmed for telephone  
calls. To quickly select the telephone group in the current system,  
press the TEL option switch. When a telephone group is selected,  
is displayed.  
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LTR-NET AUXILIARY CALLS  
2. When “ringing” is heard, press the PTT switch and respond. The  
PTT switch must be pressed to talk and released to listen the same  
as with standard calls.  
3. When the call is finished, it should be terminated as in step 6 of the  
preceding section.  
Landside-Originate Telephone Calls  
If telephone calls can be placed, then it is usually possible to  
receive telephone calls from a landside telephone. With some radio  
systems, each mobile is assigned a unique telephone number so that  
it can be dialed directly. With others, the number of the radio system  
is dialed and then when a tone sounds, the number specifying the  
mobile being called is dialed using a tone-type telephone. The  
mobile user hears “ringing” when the call is received. Contact your  
system operator for the number to dial and more information on how  
to place these calls.  
LTR-NET AUXILIARY CALLS  
General  
The LTR-Net Auxiliary calls include Unique ID and Directed  
Group calls (see page 42). Unique ID calls are to specific mobiles,  
and Directed Group calls are to specific talk groups. These calls can  
be placed to mobiles in your site or some other site that is part of  
your radio network.  
As with telephone calls, a special number must be dialed to  
place these calls. Therefore, a microphone with a telephone keypad  
is required. The number dialed is 1-10 digits long, and is provided  
by your system operator. Other requirements to place these calls are  
you must be authorized to make them and your transceiver must be  
appropriately programmed.  
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LTR-NET AUXILIARY CALLS  
Placing LTR-Net Auxiliary Calls  
1. Select the LTR-Net system and group programmed for Auxiliary  
calls. When a group programmed for these calls is selected,  
indicated in the upper part of the display. The group alpha tag  
is  
displayed on the lower line may also indicate when one of these  
groups is selected.  
2. To obtain a dial tone, briefly press the PTT switch. If the proceed  
tone is enabled, hold the PTT switch until this tone sounds. Busy  
or no access conditions may also be indicated the same as  
described for standard group calls on page 28.  
3. A 1-10 digit number is dialed which specifies the destination of  
the call. Refer to step 3 on page 30 for more dialing information.  
4. A tone then sounds to indicate that the call was accepted by the  
system. If this tone does not sound, an unauthorized or incorrect  
number may have been dialed. The call then proceeds as follows.  
If all system resources are busy, the call is placed in a queue as  
described in “Busy Queuing” on page 42.  
Unique ID Call - Ringing is heard to indicate that the other trans-  
ceiver is being rung. If there is no answer, ringing automatically  
stops after several rings and the call is terminated. When the other  
party answers, respond as with a standard call.  
Directed Group Call - A second tone sounds to indicate that the  
path is complete and speaking should begin. No ringing occurs.  
5. When the call is complete, it should be terminated by transmitting  
either the # or  
has been terminated.  
# characters. Three beeps indicate that the call  
X
Receiving Auxiliary Calls  
To receive a Unique ID call, all that is required is that an LTR-  
Net system containing a group programmed for those calls be  
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OPTION SWITCHES AND MENU MODE  
selected. To receive a Directed Group call, the group of the call may  
need to be selected or scanned. A Unique ID call is indicated by a  
“ringing” tone similar to telephone calls, and a Directed Group call  
is indicated by the caller’s voice the same as with standard group  
calls.  
The transceiver may be programmed so that responses always  
occur on the last selected group. In this case, the group may need to  
be manually changed to respond to these calls (see “Transmitting In  
The Scan Mode” on page 39). Unique ID and Directed Group calls  
can also be placed from a landside telephone. The same numbers are  
dialed as when the call is mobile originated. Contact your system  
operator for more information.  
OPTION SWITCHES AND  
MENU MODE  
Option Switches  
All five option switches on the front panel are programmable  
by your system operator. The available option switch functions are  
indicated by an entry in the “Option Switch” column of the table on  
the next page. More information on each function can be found on  
the page indicated in this table. Some functions may be controlled  
by both the menu mode and an option switch. The function  
controlled by each switch may be indicated on the switch key cap.  
Some switches may not be used or may have a blank key cap.  
Menu Mode Introduction  
The menu mode is selected by pressing the Menu option switch  
(the label may vary) or the FCN switch twice. If neither of these  
switches is programmed, the menu mode is not available. Functions  
which can be controlled by the menu mode are indicated by an entry  
in the “Menu Items” column of the preceding table. More informa-  
tion on each function can be found on the page indicated in this  
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OPTION SWITCHES AND MENU MODE  
table. Some parameters may not be displayed because they are not  
used or are in a fixed state or controlled by an option switch. Calls  
cannot be received or transmitted while the menu mode is selected.  
Menu Mode and Option Switch Functions  
Option See Descrip.  
Function  
Menu Items  
Switch  
on Page  
Add/delete (scan list prg)  
Backlight adjust  
Bank select  
Display mode select  
Emergency sys/grp select  
Encryption on-off  
Function select  
A/D  
38  
16  
20  
16  
21  
21  
22  
22  
BACKLGHT  
BANK SEL  
SG DISPL  
BANK  
EMER  
ENCPT  
FCN  
ENCRYPT  
Home system/group  
select  
HOME  
FCN then  
press Sel Sw  
Horn Alert on-off  
Menu mode select  
HRN ALRT  
23  
33  
MENU  
FCN (twice)  
AUX  
Option select  
Roaming on-off [1]  
Scan on-off  
Scan type select  
Scan continue on-off  
Scan list save mode  
Stealth mode select  
Squelch adjust  
OPTION  
ROAMING  
24  
43  
35  
35  
39  
38  
26  
18  
ROAM  
SCAN  
SCN TYPE  
SCN CONT  
SCN SAVE  
STEALTH  
FCN then  
rotate Sel Sw  
TEL  
Telephone group select  
Tone type select  
41  
26  
TONES  
NOTES: Functions left blank are not available.  
[1] Available with LTR-Net operation only.  
34  
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SYSTEM AND GROUP SCANNING  
Using Menu Mode  
1. To select the menu mode, press the Menu switch or FCN FCN (the  
FCN switch twice). The top line of the display indicates the func-  
tion being edited, and the bottom line indicates the current status  
of that function (see following illustration).  
Function  
Status  
2. To display the various functions that are controllable by the menu  
mode (top line indication), rotate the Select switch. The currently  
selected status of that function is displayed on the bottom line.  
3. To change the selected status, press the Select switch. The selec-  
tions displayed for each menu function are shown on page 52.  
4. The selected status conditions for the various functions are saved  
when the menu mode is exited in one of the following ways:  
• Pressing the FCN switch again  
• Pressing the PTT switch  
• Automatically when time-out occurs 2 seconds after a change is  
made or 8 seconds after no changes are made.  
SYSTEM AND GROUP SCANNING  
General  
Introduction  
The scan feature monitors, in sequence, the programmed  
systems and/or groups in the scan list. When a message is detected  
that the transceiver is programmed to receive, scanning stops and the  
35  
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SYSTEM AND GROUP SCANNING  
message is received. Shortly after the message is complete, scanning  
resumes (unless it has been disabled). Scanning is sequential through  
the programmed systems and groups. System and group scanning  
operate as follows:  
System Scanning - Detects calls on all systems that are in the  
system scan list. When system scanning is not used, calls are  
detected on only the currently selected system.  
Group Scanning - Detects calls on the selectable groups in the  
current or scanned systems that are in the group scan list. When  
group scanning is not used, calls are detected on only the  
currently selected group or if system scanning, on the last  
selected group of each system.  
Scan On-Off  
System and/or group scanning are turned on and off by the  
SCAN option switch. When system and/or group scanning is  
enabled by this switch,  
is indicated in the display (see following  
illustration). Then when system or group scanning is actually occur-  
ring, a scrolling underline is displayed under each character in the  
upper line of the display. The microphone must be on-hook for scan-  
ning to occur (unless off-hook detection has been disabled as  
described on page 18).  
System Scan List  
Group Scan List  
System or Group  
System or Group  
Scanning Occurring  
Scanning Selected  
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SYSTEM AND GROUP SCANNING  
Scan Types  
The type of scanning selected is determined by the menu mode  
SCN TYPE parameter (see page 33). If it is not selectable, the type  
of scanning is fixed by programming. The available scan types are as  
follows.  
SYSTEMS - Both system and group  
GROUPS - Group scanning only  
OFF - Both types disabled (SCAN switch non-functional)  
If the SCAN option switch is not programmed, the selected  
mode is always enabled. If both the switch and SCN TYPE menu  
parameter are disabled, the scan mode and type are fixed by  
programming. The selected system and group can be changed while  
scanning using the Select switch in the normal manner. Scanning  
resumes shortly after the change is made.  
When a call is received in the scan mode, the display changes to  
the system and group of the call. Programming determines if this  
change is temporary or permanent, and if a response occurs on the  
system/group of the call or the selected system/group. Refer to  
“Transmitting In The Scan Mode” on page 39 for more information.  
LTR-Net Mode Scanning  
When system scanning with an LTR-Net system selected and  
roaming disabled, only the LTR-Net systems in the scan list that  
access the site of the selected system are scanned. LTR and conven-  
tional systems are not scanned.  
When system scanning with roaming enabled, registration on  
other sites occurs normally and scanning operates as just described.  
However, if the current LTR-Net site is lost and no other LTR-Net  
site can be located, the LTR and conventional systems in the scan list  
are also scanned. If an LTR-Net site is again detected, registration on  
that site occurs and the LTR and conventional systems are no longer  
scanned. This can provide uninterrupted operation in areas which  
have not been converted to LTR-Net operation.  
37  
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SYSTEM AND GROUP SCANNING  
LTR and Conventional Mode Scanning  
When an LTR or conventional system is selected with system  
scanning enabled and roaming disabled, scanning is sequential  
through only the LTR and conventional systems in the scan list  
(LTR-Net systems are not scanned). If roaming is enabled, all three  
system types are scanned as described in the preceding LTR-Net  
description. Therefore, LTR and conventional systems are not  
scanned while on LTR-Net site.  
Scan List Programming  
General  
NOTE: The selected (displayed) system and group are always  
scanned even if they have been deleted from the scan list.  
The system and group scan lists are programmed using the A/D  
(add/delete) option switch. Pressing this switch changes the status of  
either the displayed system or group, depending on whether the  
system or group select mode is active. This is the same select mode  
used for system and group selection as described on page 17. For  
example, to change the scan list status of the displayed system, press  
the Select switch if necessary so that the system select mode is indi-  
cated and then press the A/D switch.  
The displayed system is in the scan list and scanned normally  
when  
is displayed. Likewise, the displayed group is in the scan list  
is displayed (see preceding illustra-  
and scanned normally when  
tion). Deleting a system only temporarily deletes the groups associ-  
ated with that system. When a system is added back into the scan list,  
the original group scan list is again active.  
Systems and groups can be deleted from the scan list while  
listening to a message on the system or group by pressing the A/D  
switch in the normal manner. Scanning resumes shortly after the  
system or group is deleted. Scan list programming is not available if  
the A/D switch is not programmed.  
38  
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SYSTEM AND GROUP SCANNING  
Saving Scan List  
If the menu mode SCN SAVE parameter is available, you can  
select if scan list changes are saved. If “On” is selected, changes are  
saved as they are made and the scan list is the same when power is  
turned on. Conversely, if “Off” is selected, they are not saved and the  
default scan list status of all systems and groups is reselected when  
power is turned on. If the menu SCN SAVE parameter is not select-  
able, the scan list save mode is fixed in one of these states.  
Scan Delay and Continue Timers  
When a message is received or transmitted while scanning, there  
is a short delay before scanning resumes. The delay after receiving a  
call prevents another message from being received before a response  
can be made. Likewise, the delay after transmitting a call ensures that  
you hear a response to your call instead of another message occurring  
on some other system or group. Scanning does not resume if it has  
been disabled, such as by taking the microphone off-hook.  
There is also a scan continue timer that may be programmed.  
This timer controls the maximum time that a call is received before  
scanning resumes. Times up to 60 seconds can be programmed. This  
prevents scanning from being delayed for long periods by lengthy  
calls. If the menu SCN CONT parameter is selectable (see page 33),  
this feature can be turned on and off.  
Transmitting In The Scan Mode  
General  
When the transmitter is keyed in the scan mode, programming  
determines if the transmission occurs on the last selected or last  
received system/group. The display usually indicates the system/  
group on which a transmission would occur. The exceptions are  
noted in the following information. The three programmable config-  
urations are as follows.  
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LTR-NET AND LTR FEATURES  
Last Selected - Transmissions always occur on the system/group  
that was last selected by the Select switch. Therefore, the display  
may not indicate the system/group on which a response occurs. To  
respond to a call not on the selected system/group, first select the  
system/group of the call using one of the following methods:  
• Select it manually using the Select switch.  
• Before scanning resumes, exit the scan mode by pressing the  
SCAN switch. The system/group of the call then becomes the  
selected system/group and it is not necessary to change it  
manually.  
Last Received - The selected system/group changes to the system/  
group of a call. Therefore, you can always respond to a call without  
having to manually change the system/group. To return to the previ-  
ously selected system/group, it must be manually selected using the  
Select switch.  
Temporary Last Received - The system/group changes to the  
system/group of a call for only the duration of the scan delay period  
(see page 39.) Then when the delay expires and scanning resumes (if  
it is not disabled), the selected system/group is again displayed.  
Therefore, you can respond to a call without changing the selected  
system/group as long as you do so before scanning resumes.  
LTR-NET AND LTR FEATURES  
Transmit Inhibit  
The Transmit Inhibit feature prevents the transmitter from  
keying if the mobile you are calling is busy with another call. When  
the transmitter is disabled by this feature, the intercept tone sounds  
and “TX INHIB” is displayed (see following illustration). To make  
another call attempt, the PTT switch must be released and pressed  
40  
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LTR-NET AND LTR FEATURES  
again. However, you may want to wait a few seconds before making  
another attempt because a timer must time out before another  
attempt will be successful. A similar Transmit Disable On Busy  
feature is available on conventional systems (see page 46).  
Calls on Priority ID Codes  
With LTR-Net and LTR systems, each selectable group is  
programmed with a receive priority number. If a call with a higher  
priority is detected while receiving a call, the current call is immedi-  
ately dropped and the higher priority call is received. System or  
group scanning does not need to be enabled for this to occur. Some  
groups, such as those used to make telephone calls, may be  
programmed as not interruptible so that calls on those groups are not  
interrupted by other calls.  
The system/group of the higher priority call is displayed while  
it is received. The programming of the Last Selected/Last Received/  
Temporary parameter described on page 39 determines if the change  
is temporary or permanent and if a response occurs on the displayed  
or last selected system/group.  
Telephone Group Select  
If the TEL option switch is programmed (see page 33), it can be  
used to quickly select the group programmed for telephone calls in  
the current system. When a telephone group is selected,  
is  
displayed (this icon is also displayed if an LTR-Net Auxiliary call  
group is selected). If more than one group is programmed for tele-  
phone calls, the first higher numbered telephone group is selected. If  
there is no telephone group or a conventional system is selected,  
“NO PHONE” is displayed and an error tone sounds.  
41  
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LTR-NET FEATURES  
LTR-NET FEATURES  
NOTE: Other LTR-Net features are described starting on page 40.  
LTR-Net Standard and Special Calls  
The LTR-Net Special and Auxiliary calls are shown below.  
Refer to the descriptions which follow for more information.  
Telephone  
Unique ID  
Special  
Auxiliary  
Directed Group  
Standard Group Calls - Standard group calls are between two mobiles  
or between a mobile and a control station. To place these calls in the  
LTR-Net or LTR mode, simply select the desired group and press the  
PTT switch. The procedure for placing and receiving these calls is  
described starting on page 27.  
Telephone Calls - These calls allow you to make telephone calls using  
your transceiver, and they are described starting on page 29.  
Auxiliary Calls - As shown in the preceding illustration, Auxiliary  
calls include Unique ID and Directed Group calls. Unique ID calls  
allow calls to be placed to specific mobiles, and Directed Group calls  
allow calls to be placed to specific talk groups. Auxiliary calls are  
described starting on page 31.  
Busy Queuing  
Queuing may be provided by the radio system when placing the  
special calls described in the preceding section if system resources  
are not available for the call. Standard group calls are not queued.  
When a call is placed in a queue, a voice message informs you that  
this has occurred. Then when resources become available, the call is  
automatically placed and the normal ringing or other tones are heard  
if applicable. If the call cannot be placed in the allotted time, it is  
terminated and another message informs you that this has occurred.  
42  
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LTR-NET FEATURES  
Roaming  
LTR-Net radio localities (sites) can be linked together to  
provide wide area coverage. Then as you travel from locality to  
locality with roaming enabled, calls are automatically routed to your  
current location. Both standard group and special calls may be  
routed to other localities. To utilize the Roaming feature, proceed as  
follows:  
1. An LTR-Net system must be selected. When an LTR or conven-  
tional system is selected, roaming is disabled.  
2. Roaming must be enabled by the ROAM option switch or  
ROAMING menu parameter (see page 33) if available. When  
roaming is enabled and disabled by the option switch, “ROAM  
ON” and “ROAM OFF” are momentarily displayed. If neither the  
menu parameter nor option switch is available, roaming is fixed in  
the on or off mode by programming.  
3. Scanning does not need to be enabled. If it is, an LTR-Net system  
must be selected.  
When roaming is enabled as just described and the signal from  
the current locality becomes weak, the transceiver automatically  
begins searching for another locality. While searching is occurring,  
“LCL SRCH” is displayed as shown below. Then when a new  
locality is located, registration occurs and “LCL SRCH” is no longer  
displayed. The displayed system is the next LTR-Net system  
programmed with a different locality that could be accessed, and the  
displayed group is usually the group that was displayed before  
roaming occurred.  
43  
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LTR FEATURES  
LTR FEATURES  
NOTE: Other LTR features are described starting on page 40.  
Standard Group Calls  
Standard group calls are between two mobiles or between a  
mobile and a control station. To place these calls in the LTR or LTR-  
Net mode, simply select the desired group and press the PTT switch.  
The procedure for placing and receiving these calls is described  
starting on page 27.  
Telephone Calls  
Telephone calls allow you to place and receive calls over the  
public telephone system using your transceiver. LTR and LTR-Net  
telephone calls are described starting on page 29.  
CONVENTIONAL FEATURES  
Monitoring Before Transmitting  
General  
Regulations require that conventional groups (channels) be  
monitored before transmitting to make sure that they are not being  
used by someone else. If you were to transmit when someone else is  
talking, you would probably disrupt their conversation. In the LTR-  
Net and LTR modes, monitoring is performed automatically. In the  
conventional mode, it must be performed automatically or manually  
as follows.  
Automatic Channel Monitoring  
If the selected group is programmed for the Transmit Disable  
On Busy feature (see page 46), monitoring is performed  
automatically.  
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CONVENTIONAL FEATURES  
Busy Indicator  
If the group is not automatically monitored as just described, it  
must be monitored manually. The simplest way to do this may be to  
note if a busy condition is indicated by the front panel multi-function  
indicator (see page 11). With scanning disabled and the squelch  
control properly adjusted (see page 18), note if this indicator is  
lighted green. If it is, a signal is being detected on the selected group  
(channel) and you should not transmit a message until it turns off.  
Monitor Mode  
There may be times when the Busy indication is displayed even  
though no one is using the channel. Monitoring should then be  
performed using the monitor mode. This mode is enabled by taking  
the microphone off-hook, and is indicated by  
in the display as  
shown in the following illustration. The monitor mode temporarily  
disables Call Guard squelch (see page 47) and other squelch control  
techniques and also scanning so that all messages on the group are  
heard.  
Monitor Mode  
Selected  
The transceiver may be programmed so that the microphone  
off-hook condition is not detected. The monitor mode is then not  
enabled when the microphone is taken off-hook. The Transmit  
Disable feature then may be used on all conventional groups so that  
manual monitoring is not required.  
Monitoring may also be selectively disabled on each group by  
programming. Taking the microphone off-hook then does not enable  
monitoring on that group and monitoring is always performed by the  
Transmit Disable On Busy feature.  
45  
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CONVENTIONAL FEATURES  
A conventional system must be selected to enable monitoring.  
If the microphone is taken off-hook with an LTR-Net or LTR system  
selected, scanning halts (unless off-hook detection is disabled) but  
monitoring is not selected.  
Transmit Disable On Busy  
The Transmit Disable On Busy feature automatically disables  
the transmitter if the selected group (channel) is busy and it has not  
been monitored when the PTT switch is pressed. When the trans-  
mitter is disabled by this feature, the busy tone sounds briefly and  
“DSBL BSY” is indicated on the lower line of the display.  
While the PTT switch is pressed, the receiver is enabled so that  
activity on the channel can be monitored. The PTT switch must be  
released and then pressed again to make another call attempt. Occa-  
sionally, a busy condition may be detected even though no one is  
talking. To key the transmitter in this case, release the PTT switch  
and then immediately press it again.  
There is also a programmable option with this feature to allow  
transmitting with a busy channel if the correct Call Guard signal is  
detected. The Transmit Disable On Busy feature is enabled or  
disabled on each conventional group by dealer programming. If this  
feature is disabled or if monitoring has been performed by taking the  
microphone off-hook, the transmitter keys even if the group is busy.  
Talk-Around  
Normally, all transmissions go through a repeater which usually  
increases range because the repeater transmits at a higher power  
level and has a higher antenna. However, this means that if you are  
out of radio range of the repeater, you cannot talk to anyone even if  
the mobile you are calling is only a short distance away. To allow  
communication if this occurs, talk-around groups can be  
programmed which enable direct mobile-to-mobile communication  
without going through a repeater.  
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MISCELLANEOUS  
Talk-around is then automatically selected when one of these  
groups is selected. There is no special talk-around option switch or  
indicator. However, the group alpha tag on the lower line of the  
display may be used to indicate groups programmed for this feature.  
Talk-around is not available on LTR-Net and LTR systems.  
Call Guard Squelch  
The Call Guard squelch feature eliminates distracting messages  
intended for others using the channel. This is done by using a  
subaudible tone or digital code to control the squelch. This tone or  
code is unique to a user or a group on that channel. It is transmitted  
with the voice signal but is not heard because it is in the subaudible  
range and attenuated by a filter. Call Guard squelch can be  
programmed on each conventional group. LTR-Net and LTR opera-  
tion uses ID codes to perform a similar function.  
MISCELLANEOUS  
Supervisory Tones  
The following tones are heard at various times when operating  
this transceiver. Some or all of these tones can be disabled by the  
TONES menu parameter or programming. Refer to “Tone Select” on  
page 26 for more information.  
Busy Tone  
This tone is similar to the standard telephone busy tone, and it  
indicates that the radio system is currently busy. The display also  
indicates “BUSY” while this tone is sounding. Repeated access  
attempts are made while the PTT switch pressed with this tone  
sounding. Therefore, it is not necessary to release the PTT switch to  
access the system. This tone sounds only with LTR-Net and LTR  
calls.  
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MISCELLANEOUS  
Intercept Tone  
This is a siren-like tone (alternating high and low tones) which  
indicates the following no access and error conditions:  
• No Access - If this tone sounds shortly after pressing the PTT  
switch and “NO ACCES” is displayed, the radio system could  
not be accessed, perhaps because of an out-of-range condition  
(see “Operation At Extended Range” on page 54). Once this  
tone sounds, no more access attempts are made until the PTT  
switch is released and then pressed again. This condition is indi-  
cated only with LTR-Net and LTR calls.  
• Time-Out Timer - If this tone sounds after the transmitter has  
been keyed for an extended period and “TIMEOUT” is  
displayed, the transmitter has been disabled by the Time-Out  
Timer feature (see page 26).  
• Transmit Inhibit - If this tone sounds as soon as the PTT switch  
is pressed with an LTR-Net or LTR system selected and “TX  
INHIB” is displayed, the transmitter has been disabled by the  
Transmit Inhibit feature (see page 40).  
• Receive-Only Group - If this tone sounds as soon as the push-  
to-talk switch is pressed and “TX DISBL” is displayed, the  
group is receive-only (see page 25).  
Proceed (Clear-To-Talk) Tone - This is a short single or double tone  
which sounds after the push-to-talk switch is pressed to indicate  
when talking can begin (see page 25).  
Key Press Tone - This is a short tone that indicates when an option  
switch is pressed.  
Wrap-Around Tone - This is a two-pitch tone that indicates that the  
highest or lowest channel was displayed and that wrap-around has  
occurred.  
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MISCELLANEOUS  
Error Tone - This is a two-pitch tone that indicates that an error condi-  
tion has occurred.  
LTR-Net Special Call Tones  
The following tones are generated by the LTR-Net equipment  
and are heard when making a telephone, unique ID, or directed  
group special call on an LTR-Net system.  
Confirmation Tone - This is a short tone that sounds when the num-  
ber just dialed has been accepted by the system.  
Call Proceed Tone - With LTR-Net directed group calls (see  
page 32), ringing does not occur after the number is dialed. Instead,  
another short tone sounds after the confirmation tone to indicate that  
the audio path is complete and speaking can begin.  
End Call Tone - Three beeps which indicate that the end of the call  
has been detected by the system.  
Proceed Dialing Tone - When placing a landside-to-mobile tele-  
phone call (see page 31), the landside caller may enter a special  
number which specifies the mobile being called. This tone indicates  
when that number should be dialed.  
LTR Telephone Call Tones  
The following tones are generated by LTR interconnect equip-  
ment and are heard when making LTR telephone calls.  
Reorder Tone - Three beeps which indicate that the call has been  
terminated by the system.  
Return Time Warning Tone - Two beeps which warn that you have  
not transmitted for an extended period. If you do not transmit within  
5 seconds, the call is automatically terminated by the system. The  
time between transmissions is one of the parameters used by the  
system to detect the end of a call when the # character is not sent.  
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MISCELLANEOUS  
Conversation Time-Out Tone - Calls are limited to a certain length  
by the system. Thirty seconds before this time is reached, a “tick”  
begins sounding each second. When the 30-second time expires, the  
call is automatically terminated by the system.  
Turn-Around Tone - This is a single beep which may be used to  
indicate to the landside party when to respond to your transmission.  
It sounds when you release the PTT switch, and you may partially  
hear this tone.  
Proceed Tone - This tone consists of two beeps and it tells the land-  
side caller when to enter the five-digit number specifying the mobile  
being called. Dialing of this number must be started within 5 sec. of  
hearing this tone, and a tone-type telephone must be used.  
Display Messages  
The following messages appear in the display to indicate  
various operating modes and error conditions.  
BUSY - Indicates that the LTR-Net or LTR radio system is currently  
busy (see “Busy Tone” on page 47).  
CALL SVC - Indicates that the transceiver is inoperative. Contact  
your system operator for service.  
DSBL BSY - Indicates that the transmitter is disabled by the  
conventional Transmit Disable On Busy feature (see page 46). It  
also indicates that the transmitter was keyed while receiving an  
LTR-Net or LTR call.  
FCN - Indicates that the function select mode is selected by the FCN  
option switch (see page 22).  
LCL SRCH - Indicates that the transceiver is currently searching  
for a new locality (site) on which to register (see page 43).  
Model - The last seven digits of the transceiver part number are indi-  
cated very briefly on the top line of the display when transceiver  
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power is turned on. This number indicates such things as frequency  
band, power output, and tier of the transceiver. The eighth digit is  
reserved and always “0”.  
NO ACCES - Indicates that the radio system could not be accessed,  
perhaps because of an out-of-range condition. Refer to “Operation  
At Extended Range” on page 54 for more information.  
NO PHONE - Indicates that there is no telephone group  
programmed in the current system when the Telephone option  
switch is pressed (see page 41).  
NO POWER - Indicates that the transmitter temperature or supply  
voltage is excessive and that the transmitter has been automatically  
shut down. Release the PTT switch and allow the transmitter to cool.  
If the problem persists, contact your system operator for service.  
NOT AUTH - Indicates that an attempt was made to register on a  
site where service was not authorized (see page 43).  
NOT CONV - Indicates that an attempt was made to enable a  
conventional mode feature on an LTR-Net or LTR system.  
NOT LNET - Indicates that an attempt was made to enable an LTR-  
Net mode feature on an LTR or conventional system.  
OUT-LOCK - Indicates that the synthesizer is unlocked. Refer to  
“Transceiver Service” on page 55 for more information.  
PROG ERR - Indicates an EEPROM read error. Refer to “Trans-  
ceiver Service” on page 55 for more information.  
SLEEPING - Indicates that the transceiver has been temporarily  
disabled by the system operator. It will be automatically enabled  
again when operation can be resumed.  
SQUELCH - Indicates that the conventional squelch adjust mode is  
selected (see page 18).  
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TIMEOUT - Indicates that the transmitter has been disabled by the  
Time-Out Timer (see page 26).  
TX DISBL - Indicates that the transmitter has been disabled because  
the selected group is receive-only (see page 25).  
TX INHIB - Indicates that the transmitter has been disabled by the  
Transmit Inhibit feature (see page 40).  
Menu Mode Messages  
The following messages are displayed in the menu mode that is  
described starting on page 33. The enabled or “yes” condition is  
indicated by “ON”, and the disabled or “no” condition by “OFF”.  
BACKLGT - Backlight control  
• BRIGHT  
• DIM  
• OFF  
BANK SEL - Bank select  
• Bank alpha tag  
ENCRYPT - Encryption select  
• ON or OFF  
HRN ALRT - Horn alert select  
• ON or OFF  
OPTION - Option on-off  
• ON or OFF  
ROAMING - LTR-Net roaming on-off  
• ON or OFF  
SCN CONT - Scan continue on-off  
• ON or OFF  
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SCN SAVE - Scan list save  
• ON = save, OFF = not saved  
SCN TYPE - Selects type of scanning  
• SYSTEM - Both system and group  
• GROUPS - Group scanning only  
• OFF - All scanning disabled  
S/G DISPL - System/group display mode  
• ALPHA  
• NUMERIC  
STEALTH - Stealth mode select  
• ON or OFF  
TONES - Beep tones select  
• SILENT - All tones disabled  
• KEYS - Only Select switch and key press tones sound  
• ALERTS - All tones sound except preceding Key Beeps sound  
• ALL - All the preceding tones sound  
System Operator Programming  
As noted several times in this manual, programming determines  
the availability and specific operation of many features. This refers  
to the programming performed by your system operator when the  
radio was set up, not to any programming that you can perform. If a  
feature is not controlled by a front panel option switch, it is fixed in  
the mode set by programming or not available. If you require addi-  
tional information on the operation of a feature, contact your system  
operator.  
Speaking Into Microphone  
For best results, hold the microphone about 1-2 inches from  
your mouth and speak at a normal conversational level. Do not shout  
since it distorts your voice and does not increase range. Make sure  
that the PTT (push-to-talk) switch is pressed before you begin to  
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speak and released as soon as the message is complete. If the  
proceed tone is used, wait for that tone to sound before speaking (see  
description on page 25).  
Operation At Extended Range  
When approaching the limits of radio range, the other party  
may not be able to hear your transmissions and there may be an  
increase in background noise when messages are received. You may  
still be out of range even though you can hear a message. The reason  
for this is that the signal you are receiving is usually transmitted at a  
higher power level than the one transmitted by your transceiver.  
Communication may be improved by moving to higher ground or  
away from shielding objects such as tall buildings or hills.  
Preventing Battery Discharge  
In the standby mode (power on, not transmitting), transceiver  
power consumption is relatively low. Therefore, you can probably  
leave the transceiver on for one or two days without operating the  
vehicle and the battery should not become seriously discharged.  
However, if the outdoor temperature is low enough to significantly  
decrease battery capacity, the transceiver should be turned off when  
not in use.  
Since power consumption is significantly higher when transmit-  
ting, it is good practice to have the vehicle running while transmit-  
ting. This ensures that optimum power is being delivered to the  
transceiver and that the battery does not become discharged.  
Licensing  
A government license is usually required to operate this trans-  
ceiver on the air. Your system operator will normally handle the  
licensing requirements.  
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Transceiver Service  
If your transceiver is not operating properly, “OUT-LOCK”,  
“PROG ERR”, “SLEEPING”, or “CALL SVC” may be displayed. It  
may be possible to clear either of the first two conditions by turning  
off and then on again to reset the control logic. Also make sure that  
the controls are properly set and that the power, external speaker (if  
used), and accessory (if used), cables are securely plugged into the  
back of the transceiver. If the transceiver still does not operate prop-  
erly, return it to your system operator for service.  
The “SLEEPING” message indicates the transceiver is tempo-  
rarily disabled as described on page 51, and when the CALL SVC  
message is displayed, the transceiver must always be returned to  
your system operator for service.  
Another indication that could be displayed is “NO POWER”.  
This indicates that transmitter temperature or supply voltage is  
excessive. Release the PTT switch and allow the transceiver to cool,  
and make sure that the vehicle battery voltage is within the normal  
range.  
NOTE: There are no user-serviceable components in the transceiver.  
Altering internal adjustments can cause illegal emissions, void the  
warranty, and result in improper operation that can  
seriously damage the transceiver.  
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Part No. 002-9803-601  
11-99hph Printed in U.S.A.  
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