E.F. Johnson Company 7243 LTR-NET User manual

OPERATING
MANUAL
7243
LTR-NET™
PORTABLE
UHF
TRUNKED PORTABLE RADIO

LAND MOBILE PRODUCT WARRANTY - The manufacturer’s
warranty statement for this product is available from your product
supplier or from E.F. Johnson Company, 299 Johnson Avenue, Box
1249, Waseca, MN 56093-0514. Phone [phone].
Copyright© 2001 by the E.F. Johnson Company
The E.F. Johnson Company, which was founded in 1923, provides
wireless communication systems solutions for public safety, govern-
ment, and commercial customers. The company designs, manufac-
tures, and markets conventional and trunked radio systems, mobile
and portable subscriber radios, repeaters, and Project 25 digital radio
products.
Viking Head/EFJohnson logo, LTR®, LTR-Net™, 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.

SAFETY TRAINING INFORMATION
4
SAFETY TRAINING INFORMATION
WARNING
This radio produces RF electromagnetic energy when transmitting and is
designed and classified for “Occupational Use Only”. Radio equipment
with this classification must be used only during the course of employ-
ment by individuals aware of the hazards and the ways to minimize such
hazards. This radio is NOT intended for use by the General Population in
an uncontrolled environment.
This radio has been tested and complies with FCC RF exposure limits for
“Occupational Use Only”. In addition, it complies with the following
standards and guidelines with regard to RF energy and electromagnetic
energy levels and evaluation of such levels for exposure to humans:
•FCC OET Bulletin 65 Edition 97-01 Supplement C, Evaluating
Compliance with FCC Guidelines for Human Exposure to Radio
Frequency Electromagnetic Fields.
•American NationalStandardsInstitute(C95.1-1992), IEEEStandard
for Safety Levels with Respect to Human Exposure to Radio
Frequency Electromagnetic Fields, 3 kHz to 300 GHz.
•American National Standards Institute (C95.3 -1992), IEEE Recom-
mended Practice for the Measurement of Potentially Hazardous
Electromagnetic Fields - RF and Microwave.
CAUTION
To ensure that your exposure to RF electromagnetic energy is within the FCC
allowable limits for occupational use, always adhere to the following guidelines:
•DO NOT operate the radio without the proper antenna attached. This may
damage the radio and cause FCC RF exposure limits to be exceeded. The
proper antenna is the antenna supplied with the radio by the manufacturer
or an antenna specifically authorized by the manufacturer for use with this
radio.

SAFETY TRAINING INFORMATION
5
•DO NOT transmit more than 50% of total radio use time (50% duty cycle).
Transmitting for more than 50% of the time can cause FCC RF exposure
compliance requirements to be exceeded. This radio is transmitting when-
ever Tx is indicated in the lower right corner of the display. Pressing the
PTT switch on the side usually causes the radio to transmit.
•DO NOT use any accessories not specifically authorized by the E.F.
Johnson Company for use with this radio such as batteries, speaker-
microphones, belt clips, and antennas. The use of unauthorized accessories
can cause FCC RF exposure compliance requirements to be exceeded.
•ALWAYS keep the antenna and radio at least 2.54 cm (1.0 inch) away from
your body when transmitting to ensure FCC RF exposure compliance
requirements are not exceeded. The best transmission quality results when
the antenna is at least 5 cm (2 inches) away from your mouth and angled
slightly to one side.
•This unit has not been tested for FCC RF exposure compliance in applica-
tions where the unit is transmitting while body worn on the belt clip. This
product is not intended for use in applications where transmissions are
required while the unit is body worn with the use of the belt clip.
NOTE: The preceding information is provided to make you aware of RF expo-
sure and what to do to ensure that this radio is operated within FCC RF
exposure limits.
Electromagnetic Interference/Usage Compatibility
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 modification 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).
DO NOT operate it in areas that are sensitive to RF energy such as aircraft,
hospitals, blasting sites, and fuel storage sites. Areas with potentially flammable
atmospheres are usually, but not always, clearly posted. These may include gas
stations, fuel and chemical storage and transfer stations, below deck on boats,
and areas where the air contains flammable chemicals or particles such as grain
dust or metal powders.
Dispose of the nickel metal-hydride battery used by this radio in accordance with
local regulations. DO NOT dispose of it in fire because it can explode. Also, do
not short the terminals because it may become very hot.

TABLE OF CONTENTS
6
TABLE OF CONTENTS
SAFETY TRAINING 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
Top Panel Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Side Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Front Panel Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
BASIC OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Power-Up Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Backlight Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Setting Volume Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
System/Group Display Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
System and Group Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Keypad Disable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Transceiver Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Low Battery Indication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Option Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
LTR-Net, LTR, and Conventional Operation. . . . . . . . . . . . . . . . . . 23
GENERAL FEATURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Bank Select. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Call Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Home System/Group Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Proceed (Clear-To-Talk) Tone . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Receive-Only Groups. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Time-Out Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Tone Select. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
STANDARD GROUP CALLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Placing a Standard Group Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Receiving a Standard Group Call. . . . . . . . . . . . . . . . . . . . . . . . . . .29

TABLE OF CONTENTS
7
TELEPHONE CALLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Placing Telephone Calls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Receiving a Telephone Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Landside-Originate Telephone Calls . . . . . . . . . . . . . . . . . . . . . . . .32
LTR-NET AUXILIARY CALLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Placing LTR-Net Auxiliary Calls. . . . . . . . . . . . . . . . . . . . . . . . . . .32
Receiving Auxiliary Calls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
OPTION SWITCHES AND MENU MODE . . . . . . . . . . . . . . . . . . .34
Option Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Menu Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
DIAL MODE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Selecting Dial Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Dialing a Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Sending the Number. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Storing Numbers in Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Recalling Numbers From Memory. . . . . . . . . . . . . . . . . . . . . . . . . . 39
Exiting Dial Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Placing Calls Without Selecting Dial Mode. . . . . . . . . . . . . . . . . . .39
SYSTEM AND GROUP SCANNING. . . . . . . . . . . . . . . . . . . . . . . .40
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
Scan List Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Scan Delay and Continue Timers. . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Transmitting In The Scan Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
LTR-NET AND LTR FEATURES. . . . . . . . . . . . . . . . . . . . . . . . . . .45
Transmit Inhibit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Priority Calls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
LTR-NET FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
LTR-Net Standard Calls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
LTR-Net Special Calls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Busy Queuing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
Roaming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
LTR FEATURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Standard Group Calls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Telephone Calls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

TABLE OF CONTENTS
8
CONVENTIONAL FEATURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Squelch Adjust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Monitoring Before Transmitting . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Transmit Disable On Busy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Talk-Around. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Call Guard Squelch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
MISCELLANEOUS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Supervisory Tones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
LTR-Net Special Call Tones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
LTR Telephone Call Tones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Display Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Menu Mode Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Rechargeable Battery Pack. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
Battery Charger Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Speaking Into Microphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
Operation At Extended Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
Licensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
Transceiver Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
INDEX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

QUICK REFERENCE GUIDE
9
QUICK REFERENCE GUIDE
Change system number - Press SYS or or SYS (1-99) [pg 21]
Change group number - Press GRP or or GRP (1-99) [pg 21]
System scan on/off - FCN SCAN ( indicates scanning is enabled) [pg 40]
Change scan list status of displayed system - FCN S.A/D ( indicates that
the system is in the scan list and scanned normally) [pg 42]
Change scan list status of displayed group - FCN G.A/D ( indicates that the
group is in the scan list and scanned normally) [pg 42]
Change between alpha and numeric display modes - FCN STR [pg 20]
Display home or last active system/group - FCN HOME [pg 26]
Select/Exit Menu Mode - FCN MENU [pg 35]
Lock/Unlock Keypad - FCN ( indicates locked keypad) [pg 22]
Adjust Squelch (conventional only) - FCN SQL then and [pg 48]
NUMBER DIALING
Select dial mode without changing system/group - FCN DIAL [pg 37]
Select dial mode and telephone system/group - FCN PHONE [pg 37]
Transmit number in display-Briefly press PTT sw then FCN SND [pg 38]
Erase last number in display - CLR [pg 38]
Erase entire number in display - RCL CLR [pg 38]
Display overflow digits - FCN [pg 38]
Enter a pause - FCN [pg 38]
Store a number in memory - Enter no., then FCN STR (0-9) [pg 38]
Display numbers in memory - RCL (hold down to repeat) [pg 39]
Recall number from a memory location - FCN RCL (0-9) [pg 39]
Recall last number dialed - FCN RCL [pg 39]
Recall last number dialed from memory - FCN RCL [pg 39]
Exit dial mode and terminate call - FCN PHON [pg 39]
Exit dial mode without terminating call - FCN DIAL [pg 39]
BUSY
G
S
UID Tx
P 2
C
L
System
Scan List Phone Group Group Scan
List
Scan Call
8-Character
Alphanumeric
Monitor
Keypad
Dial
Mode Low Power Priority
Transmitter
Keyed
Lock
UID/Aux
Group
Low
Battery
Conv Ch
Busy
Display
S
G
For more information on a function, refer to the page number in brackets [xx].

FEATURES
10
FEATURES
General Features
•LTR-Net™, LTR®, and conventional operating modes
•Unique 8-character system identification tags
•System and group scan
•User programmable system and group scan lists
•Menu mode to select various functions
•Three programmable option switches
•Call progress tones
•Call indicator
•Receive-only groups
•Companding
LTR-Net Features
•Roaming (automatic locality search)
•Standard group (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 group and telephone calls
•Transmit inhibit
•Receive priority calls
Conventional Features
•Busy indicator
•Talk-around
•User-adjustable squelch level
•Monitor mode
•Call Guard®squelch control
•Transmit disable on busy
NOTE: System operator programming determines the availability of many of the
preceding features.

CONTROLS AND DISPLAY
11
CONTROLS AND DISPLAY
Top Panel Controls
On-Off Volume - Turning this knob clockwise turns power on and sets
the volume level. Turning it counterclockwise to the detent turns power
off. Power is on when information appears in the display. For more
information on setting the volume, refer to page 20.
Antenna Jack
On-Off/Volume
Microphone
Speaker
Option
Switch
Accessory
Connector

CONTROLS AND DISPLAY
12
Option Switch 1 - This switch can be system operator programmed to
control a specific function (see page 35).
Antenna Jack - Connection point for the antenna.
Accessory Connector - When the protective cover is removed, this
connector can be used for connecting optional accessories.
Battery Release Button (Not shown) - This button is located on the
bottom end of the transceiver, and it is pressed to release the battery so
that it can slide downward and be removed from the radio.
Side Controls
Option Switch 2 - This switch can be system
operator programmed to control a specific function
(see page 35).
PTT (Push-To-Talk) - Keys the transmitter so that a
message can be transmitted. The “Tx” icon in the
display indicates when the transmitter is keyed.
Option Switch 3 - This switch can be system
operator programmed to control a specific function
(see page 35).
Option
Switch 2 PTT
Switch
Option
Switch 3

CONTROLS AND DISPLAY
13
Display
8-Character Alphanumeric Display - This area of the display indicates
the selected system/group (see “System/Group Display Mode” on
page 20), the dialed number (see “Dial Mode” on page 37), error condi-
tions, and other information.
-Indicates that the displayed system is in the scan list and scanned
normally (see “Scan List Programming” on page 42).
- The base portion of this icon is displayed when the displayed group
is programmed for telephone calls. The top portion (receiver) is displayed
when the dial mode is selected (see page 37).
L- Indicates that the low-power mode is selected by the menu mode or a
low-battery condition (see page 26).
- Indicates that the scan mode is selected (see page 40).
C- Indicates that a call has been received on a group programmed for a
call indicator (see page 25). Press any key to turn this indication off.
BUSY
G
S
UID Tx
P2
C
L
System
Scan List Phone Group Group Scan
List
Scan Call
8-Character
Alphanumeric
Monitor
Keypad
Dial
Mode Low Power Priority
Transmitter
Keyed
Lock
UID/Aux
Group
Low
Battery
Conv Ch
Busy
Display
S

CONTROLS AND DISPLAY
14
- Indicates that the conventional monitor mode has been enabled by
the Monitor option switch (see page 49).
-“P” indicates that the displayed group is an LTR-Net/LTR priority
1 group, and “P2” indicates that it is a priority 2 group (see page 45).
- Indicates that the displayed group is in the scan list and scanned
normally (see page 42).
BUSY - Indicates that the selected conventional channel is currently busy
with voice or other traffic.
- Indicates a low battery condition. The battery should be
recharged or replaced as soon as practical (see page 23).
UID - Indicates that the displayed group is programmed for an LTR-Net
Unique ID or Directed Group call (see page 46).
- Indicates that the keypad has been disabled by pressing FCN
(page 22).
Tx - Indicates that the transmitter is keyed (push-to-talk switch pressed).
P
2
G

CONTROLS AND DISPLAY
15
Front Panel Keys
Most front panel keys have two or more functions. The function on
the key is usually selected by simply pressing the key, and the function
under the key is usually selected by first pressing another key such as the
FCN key. In addition, some key functions may be available in the stan-
dard mode and others in the dial mode (see page 37). Also, all key
functions except 0-9 can be assigned to an option switch and controlled
by either (see page 35). Holding the key down causes repeating when
applicable. The front panel keys operate as follows:
FCN (SCAN)
Standard Mode
FCN - Enables the alternate function of the next key that is pressed.
This alternate function is active for 2 seconds or until another key
is pressed.
FCN SCAN - Turns scanning on and off.
Dial Mode
FCN - Selects the alternate function of various keys as described in
the following information.

CONTROLS AND DISPLAY
16
SYS (RCL)
Standard Mode
SYS -Selects the next higher system.
SYS -Selects the next lower system.
SYS (xx) - Directly selects specified system.
FCN RCL - Momentarily displays the revert (selected) system if it
is not already being displayed.
Dial Mode
RCL - Scrolls through the numbers programmed in memory.
FCN RCL (0-9) - Recalls the number stored in the specified
memory location.
FCN RCL -Recalls the last number dialed from memory.
FCN RCL - Recalls the last number dialed.
GRP (CLR)
Standard Mode
The GRP key functions the same as “SYS” just described to change
or display the selected group.
Dial Mode
CLR - Erases the last digit in the display.
FCN CLR - Erases the entire number in the display.
1 (HOME)
Standard Mode
FCN HOME - Selects the preprogrammed home system/group.
1 - Pressing this key with the PTT switch pressed transmits the “1”
digit.
Dial Mode
1 - Dials the “1” digit.
2 (PHONE)
Standard Mode
FCN PHONE - Selects the dial mode and a telephone group in the
current system.
2 - Pressing this key with the PTT switch pressed transmits the “2”
digit.

CONTROLS AND DISPLAY
17
Dial Mode
2 - Dials the “2” digit.
FCN PHONE - Exits the dial mode and sends the call termination
code.
3 (DIAL)
Standard Mode
FCN DIAL - Selects the dial mode without changing the currently
selected group.
3 - Pressing this key with the PTT switch pressed transmits the “3”
digit.
Dial Mode
3 - Dials the “3” digit.
FCN DIAL - Exits the dial mode without sending the call
termination code.
4 (PAGE)
Standard Mode
FCN PAGE - The page function is currently not available.
4 - Pressing this key with the PTT switch pressed transmits the “4”
digit.
Dial Mode
4 - Dials the “4” digit.
5 (MENU)
Standard Mode
FCN MENU - Selects the menu mode.
5 - Pressing this key with the PTT switch pressed transmits the “5”
digit.
Dial Mode
5 - Dials the “5” digit.
6 (SQL)
Standard Mode
FCN SQL - Selects the squelch adjust mode for conventional
channels.
6 - Pressing this key with the PTT switch pressed transmits the “6”
digit.

CONTROLS AND DISPLAY
18
Dial Mode
6 - Dials the “6” digit.
7 (S.A/D)
Standard Mode
FCN S.A/D (System Add/Delete) - Changes the scan list status of
the currently displayed system. The system is in the scan list and
scanned normally if “ ” is displayed when not scanning.
7 - Pressing this key with the PTT switch pressed transmits the “7”
digit.
Dial Mode
7 - Dials the “7” digit.
8 (SEND)
Standard Mode
8 - Pressing this key with the PTT switch pressed transmits the “8”
digit.
Dial Mode
8 - Dials the “8” digit.
FCN SEND - Automatically accesses the radio system and trans-
mits the number in the display.
9 (G.A/D)
Standard Mode
FCN G.A/D (Group Add/Delete) - Changes the scan list status of
the currently displayed group. The group is in the scan list and
scanned normally if “ ” is displayed when not scanning.
9 - Pressing this key with the PTT switch pressed transmits the “9”
digit.
Dial Mode
9 - Dials the “9” digit.
0 (STR)
Standard Mode
FCN STR - Changes between the numeric and alpha display
modes.
0 - Pressing this key with the PTT switch pressed transmits the “0”
digit.
S
G

CONTROLS AND DISPLAY
19
Dial Mode
0 - Dials the “0” digit.
FCN STR (0-9) - Stores the displayed number in the specified
memory location.
()
Standard Mode
- Pressing this key with the PTT switch pressed transmits the
“ ” digit.
SYS - Selects the next lower system (see preceding “SYS” key
description).
GRP - Selects the next lower group (see preceding “GRP” key
description).
Dial Mode
- Dials the “ ” digit.
FCN - Enters a pause when dialing a telephone number.
FCN RCL -Recalls the last number dialed from memory.
()
Standard Mode
FCN -Enables and disables the keypad lock feature.
- Pressing this key with the PTT switch pressed transmits the “ ”
digit.
SYS - Selects the next higher system (see preceding “SYS” key
description).
GRP - Selects the next higher group (see preceding “GRP” key
description).
Dial Mode
- Dials the “ ” digit.
FCN - Displays the overflow digits for a short time.
FCN RCL -Recalls the last number dialed.
#
##
##

BASIC OPERATION
20
BASIC OPERATION
Power-Up Sequence
When power is turned on using the top panel on-off/volume control,
the backlight turns on, all segments and icons in the display are momen-
tarily 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.
Backlight Operation
The display and keypad backlight automatically turns on for 3
seconds whenever power is turned on or any key is pressed. If the Back-
light menu parameter is available (see page 35), selecting “On” enables
this operation and selecting “Off” disables the backlight entirely.
Setting Volume Levels
The relative volume level can be determined by noting the position
of the index on the volume knob. You may also be able to enable a tone
or background noise for use in setting the volume as follows:
•If key press tones are enabled, a short tone sounds whenever any key is
pressed.
•If a conventional system is selected and the monitor option switch is
programmed (see page 49), press this switch and if someone is talking
on the channel, voice is heard. If no one is talking, the squelch can be
adjusted as described on page 48 and noise is heard. It is not possible to
manually unsquelch the transceiver when an LTR-Net or LTR system
is selected.
System/Group Display Mode
Two system/group display modes can be selected. One is a numeric
format and the other is an alpha tag format. To switch between these

BASIC OPERATION
21
modes, press FCN STR. Turning power off does not change the selected
mode. These modes operate as follows:
Numeric Mode - The system and group numbers are displayed as “Sxx
Gxx” and the group alpha tag is not displayed. For example, System 1
and Group 2 are displayed as follows. When only group scanning is
occurring, the group number is replaced by dashes and the system
number continues to be displayed (see page 40).
Numeric Display Mode
Alpha Tag Mode - The group alpha tag is displayed and the system and
group numbers are not displayed. For example, the “CAR 220” system is
displayed as follows. There is no special group scan indication when only
group scanning is occurring.
Alpha Tag Display Mode
System and Group Select
Systems and groups are selected by the keypad SYS and GRP keys
and one or more other keys as follows:
•To increase the selected system, press SYS and then . Likewise, to
increase the selected group, press GRP . Holding the key down
causes the function to repeat. After the highest system or group is
selected, a tone sounds and wrap-around to the lowest system or group
occurs.
•To decrease the selected system, press SYS and then . Likewise, to
decrease the selected group, press GRP . Holding the key down
causes the function to repeat. After the lowest system or group is