E.F. Johnson Company LTR 98xx User manual

LTR® 98xx SERIES
HIGH TIER
OPERATING MANUAL
Part No. 002-9803-201 November 1999

LAND MOBILE PRODUCT WARRANTY - The manufacturer’s
warranty statement for this product is available from your product
supplier or from the E.F. Johnson Company, 299 Johnson Avenue, Box
1249, Waseca, MN 56093-0514. Phone [phone].
Copyright© 1999 by the E.F. Johnson Company
The 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®, and Call Guard® are registered
trademarks of the E.F. Johnson Company. All other company and/or
product names used in this manual are trademarks and/or registered trade-
marks of their respective manufacturer.

SAFETY INFORMATION
4
SAFETY INFORMATION
The FCC has adopted a safety standard for human exposure to RF en-
ergy. Proper operation of this radio under normal conditions results in
user exposure to RF energy below the Occupational Safety and Health
Act and Federal Communication Commission limits.
WARNING
DO NOT allow the antenna to touch or come in very close proximity
with the eyes, face, or any exposed body parts while the radio is trans-
mitting.
DO NOT operate the transmitter of a mobile radio when a person out-
side 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 atmospheres.
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 sub-
ject to the condition that this device does not cause harmful interfer-
ence. In addition, changes or modifications to this equipment not
expressly approved by the E.F. Johnson Company could void the user’s
authority to operate this equipment (FCC rules, 47CFR Part 15.19).

SAFETY INFORMATION
5
FCC EXPOSURE LIMITS
This mobile radio transceiver was tested by the manufacturer with
an appropriate antenna in order to verify compliance with Maximum Per-
missible Exposure (MPE) limits set under Section 2.1091 of the FCC
Rules and Regulations. The guidelines used in the evaluation are derived
from Table 1 (B) titled “Limits For General Population/Uncontrolled
Exposure” which is from FCC report OET bulletin #65.
Table 2 lists the antenna whips and bases recommended for use in
each frequency range. Each model of this radio was tested with the appro-
priate antenna listed. The antenna was mounted in the center of the roof
Table 1
FCC Limits for Maximum Permissible Exposure (MPE)
(A) Limits For Occupational/Controlled Exposure
Frequency Range
(MHz)
Electric Field
Strength (E)
(V/m)
MagneticField
Strength (H)
(A/m)
PowerDensity
(S)
(mW/cm22)
Averaging
Time |E|2, |H|2,
S (minutes)
0.3-3.0 614 1.63 (100)* 6
3.0-30 1842/f 4.89/f (900/f2)* 6
30-300 61.4 0.163 1.0 6
300-1500 -- -- f/300 6
1500-100,000 -- -- 5 6
(B) Limits For General Population/Uncontrolled Exposure
Frequency Range
(MHz)
Electric Field
Strength (E)
(V/m)
MagneticField
Strength (H)
(A/m)
PowerDensity
(S)
(mW/cm22)
Averaging
Time |E|2, |H|2,
S (minutes)
0.3-1.34 614 1.63 (100)* 30
1.34-30 824/f 2.19/f (180/f2)* 30
30-300 27.5 0.073 0.2 30
300-1500 -- -- f/1500 30
1500-100,000 -- -- 1.0 30
f = Frequency in MHz *Plane-wave equivalent power density

SAFETY INFORMATION
6
of a domestically manufactured 4-door passenger sedan. The radio manu-
facturer 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 fre-
quency energy or magnetic fields in excess of the guidelines set forth in
Table 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
Table 1 and take measures to comply with those guidelines.
Table 2
Recommended Antenna Whips and Bases
(Antenna Manufacturer - Antenna Specialists)
Frequency Whip Model No. Base Model No.
136-144 MHz ASPJ1415 KM220
144-152 MHz ASPA1415 KM220
152-162 MHz ASPB1415 KM220
162-174 MHz ASPC1415 KM220
400-430 MHz ASPE1615 KM220
430-470 MHz ASPD1615 KM220
470--512 MHz ASPF1615 KM220
806-869 MHz ASPA1855 KM220
890-960 MHz ASPG1865 KM220

TABLE OF CONTENTS
7
TABLE OF CONTENTS
SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
QUICK REFERENCE GUIDE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
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 Information . . . . . . . . . . . . . . . . . . . . . . . . .16
Numeric Display Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Alpha Tag Display Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Selecting the System and Group. . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Setting Squelch Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
STANDARD CALLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Placing a Standard Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Receiving a Standard Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
TELEPHONE CALLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Placing Telephone Calls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Receiving a Telephone Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Landside-Originate Calls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
GENERAL FEATURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Bank Select. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Call Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Emergency Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Encryption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Function (FCN) Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Home System/Group Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Horn Alert. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Option Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Power Turn-Off Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Proceed (Clear-To-Talk) Tone. . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Receive-Only Groups. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Stealth Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Time-Out Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

TABLE OF CONTENTS
8
Tone Select. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Transmitter Thermal Foldback. . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
OPTION SWITCHES AND MENU MODE . . . . . . . . . . . . . . . . . . . 30
Option Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Menu Mode Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Using Menu Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
SYSTEM AND GROUP SCAN. . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Scan List Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Scan Delay and Continue Timers. . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Transmitting In The Scan Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
LTR AND CONVENTIONAL MODES. . . . . . . . . . . . . . . . . . . . . . . 38
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
LTR Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Conventional Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Monitoring Conventional Channels Before Transmitting . . . . . . . .39
LTR FEATURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Standard and Telephone Calls . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
Calls on Priority and Block ID Codes . . . . . . . . . . . . . . . . . . . . . . . 40
Transmit Inhibit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Busy Queuing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
System Search . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Transpond. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
CONVENTIONAL FEATURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Monitor Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Transmit Disable On Busy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Talk-Around . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Call Guard Squelch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Priority Group Sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
MISCELLANEOUS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Supervisory Tones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
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

QUICK REFERENCE GUIDE
9
QUICK REFERENCE GUIDE
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 then rotate/press Select switch as
required to display/select desired parameter (see page 30).
Select Home System/Group - Press FCN then the Select switch.
Scan On/Off - Press SCAN switch. Scan on = , Scanning occurring =
scrolling underline (see page 33).
Program System or Group Scan List - Press Select switch to enable
system or group programming mode (same as when changing system
or group), then press A/D switch. System in list = , Group in list =
(see page 35).
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 39).
On-Off/Volume
System Scan
List
Phone
Group Scan
List
Priority
Group
Option
Encryption
Horn
Alert Scan Call
Monitor
Selected
Red - Transmit
Green - Busy Conv. Group (Channel)
Amber - Transmit (Reduced Pwr)
Select Switch
(Press/Rotate) (Press/Rotate) ID

FEATURES
10
FEATURES
General Features
•Up to approximately 100 1-group or 40 16-group systems
programmable
•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
•Time-out timer
•Horn alert
•Emergency switch
•Receive-only groups
•Companding and encryption (optional)
LTR Features
•Busy queuing (telephone calls only)
•System search (telephone calls only)
•Transpond
•Transmit inhibit
•Receive priority calls
Conventional Features
•Busy indicator
•Talk-around
•User-adjustable squelch level
•Call Guard® squelch control
•First and second priority channel sampling
•Monitor mode and Transmit disable on busy
NOTE: Dealer programming determines the availability of many of the
preceding features.

CONTROLS AND DISPLAY
11
CONTROLS AND DISPLAY
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 27. 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 for more information.
This switch also has two alternate functions that are selected by first
pressing the FCN switch. Refer to the FCN switch description which
follows for more information.
On-Off/Volume Select Switch
Microphone
Jack
Option Switches
Transmit/Busy
Indicator Speaker

CONTROLS AND DISPLAY
12
Option Switches - The five front panel option switches can be
programmed by your system operator for the functions which follow.
Refer to the section indicated for more information on a function. The
key cap usually indicates the function controlled by the switch.
A/D - Scan list add/delete (see page 35)
CG - Call Guard squelch disable (see page 46)
EMER - Emergency switch (see page 24)
ENCPT - Encryption on-off (see page 24)
FCN - Function select (see following description)
HORN - Horn alert on-off (see page 26)
MON - Monitor mode on-off (see page 39)
AUX - Option select (see page 27)
PRI - Priority sampling on-off (see page 46)
SCAN - Scan on-off (see page 33)
STLH (AUX) - Stealth mode select (see page 29)
TA - Talk-around on-off (see page 45)
(Blank) - Not used (disabled)
FCN (Function) Switch - This switch (if programmed) selects the
following functions:
Menu Mode Select - Press FCN twice (see page 30)
Home Sys/Grp Select - FCN/press Select switch (see page 26)
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
Green - Busy conventional group (channel). Refer to “Conventional
Operation” on page 38 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.

CONTROLS AND DISPLAY
13
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” description which follows.
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 and horn alert to the transceiver.
Data Cable (Not Shown) - This optional cable is used to connect data
equipment such as modems and data terminals to the transceiver.
Antenna
Jack Speaker
Jack
Power
Jack

CONTROLS AND DISPLAY
14
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 35).
- Indicates that the displayed group is in the scan list and scanned
normally (see page 35).
- Indicates that the selected group is programmed for telephone calls
(see “TELEPHONE CALLS” on page 21).
- Indicates that optional encryption is enabled (see page 24).
- Indicates that the horn alert is enabled (see page 26).
- Indicates that scanning is enabled (see page 33).
- Indicates that an option controlled by the AUX switch is enabled
(see page 24).
System Scan
List Phone
ID Group Scan
List
Priority
Groups
Option
Encryption Horn
Alert
Scan Call
16-Character
Message Area Monitor
Selected

GENERAL OPERATION
15
- Indicates that a call has been received on a group programmed for a
call indicator (see page 24). 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).
- When only is displayed, the selected or displayed group is
scanned as a first priority group. When is displayed, it is scanned as a
second priority group (see page 46).
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 trans-
ceiver part number are very briefly displayed. A beep then sounds (if
tones are enabled) and the transceiver is ready to be used.
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 refer-
ence 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 counterclockwise 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 system is selected.

GENERAL OPERATION
16
Backlight Operation
The display and keypad backlight can be controlled by the BACK-
LIGHT menu parameter (see page 38). 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 Information
The currently selected system and group are displayed using either a
Numeric or Alpha Tag display mode. The display mode is selectable if
the S/G DISPL menu parameter is available (see page 32). Otherwise, it
is fixed in one of these modes by programming. These modes function as
follows:
Numeric Mode - In the numeric 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
2 (CAR 220) is displayed as follows. The system alpha tag is not
displayed in this mode.
Numeric Display Mode
Alpha Tag Mode - In the alpha tag 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.
Alpha Tag Display Mode
System Number
Group Number
Group Alpha Tag
System Alpha Tag
Group Alpha Tag

GENERAL OPERATION
17
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 then 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 diagram).
Select Mode Indication With Numeric Display
In the Alpha Tag display mode, the system select mode is indicated
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 diagram).
Select Mode Indication With Alpha Tag Display
The transceiver can be programmed so that after a change is made,
the current select mode remains enabled or a default mode is selected
after a delay of up to 15 seconds. This programming also controls the
mode that is selected when power is turned on.
System Select
Mode Group Select
Mode
Group Select
Mode
System Select
Mode

GENERAL OPERATION
18
Setting Squelch Control
NOTE: This procedure sets the squelch level used for conventional calls
only. The squelch level for LTR calls is preset and not affected by this
adjustment. For more information on the various operating modes, refer
to page 38.
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 then 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 adjust-
ment 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.

STANDARD CALLS
19
STANDARD CALLS
Introduction
Most calls you make are probably the standard 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 type that
can be placed (telephone calls) is that no number is dialed using a
keypad. The following procedure applies to both LTR and conventional
operation.
Placing a Standard Call
1. Turn transceiver power on and set the volume as described starting on
page 15. With conventional operation, also set the squelch as described
on page 18.
2. Select the system and group of the mobile being called as described in
“Selecting the System and Group” on page 17.
3. If a conventional call is being placed, monitor the channel manually or
automatically as described on page 39.
4. Press (and hold) the microphone PTT (push-to-talk) switch to talk and
release it to listen. Operation with LTR and conventional systems is as
follows: LTR Operation
•If the proceed tone is enabled (see page 28), it sounds shortly after
the PTT switch is pressed to indicate that the radio system was
successfully accessed. If the proceed tone 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 30.
•If the radio system is busy, the busy tone sounds (see page 47) and
“BUSY” is indicated on the lower line of the display. If you continue
pressing the PTT switch, the system is accessed when it becomes
available.

STANDARD CALLS
20
•If an out-of-range condition exists, the intercept tone sounds (see
page 47) and “OUT-RNGE” is indicated on the lower line of the
display. No more access attempts are made once this indication
appears. Release the PTT switch and drive closer to the radio system
or away from shielding structures and try again.
Conventional Operation
•If the channel is busy and the Transmit Disable On Busy feature is
programmed, “DSBL BSY” is indicated on the lower line of the
display, the busy tone sounds, and the transmitter is disabled (see
page 44).
•Otherwise, busy and out-of-range conditions are not indicated and
speaking can begin when the PTT switch is pressed after monitoring
the channel. If the proceed tone is enabled on conventional systems,
it indicates when speaking can begin but does 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 Call
1. Turn transceiver power on and set the volume as described starting on
page 15. With conventional operation, also set the squelch as described
on page 18.
2. Select or scan the system and group programmed for the call you want
to receive (see page 33 for scan information).
3. 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 (see page 36).