Ericsson LBI-39012B User manual

LBI-39012B
Operator’s Manual
MDXTM Conventional
Mobile Radio
ERICSSONZ

NOTICE!
This manual covers Ericsson and General Electric products manufactured and
sold by Ericsson Inc. NOTICE!
Repairs to this equipment should be made only by an authorized service
technician or facility designated by the supplier. Any repairs, alterations or
substitution of recommended parts made by the user to this equipment not
approved by the manufacturer could void the user’s authority to operate the
equipment in addition to the manufacturer’s warranty.
This manual is published by Ericsson Inc., without any warranty. Improvements and
changes to this manual necessitated by typographical errors, inaccuracies of current
information,orimprovementstoprogramsand/orequipment,maybemadebyEricsson
Inc.,atanytimeandwithoutnotice.Suchchangeswillbeincorporatedintoneweditions
of this manual. No part of this manual may be reproduced or transmitted in any form
or by any means, electronic or mechanical, including photocopying and recording, for
any purpose, without the express written permission of Ericsson Inc.
Copyright © December 1993, Ericsson GE Mobile Communications Inc.
TABLE OF CONTENTS Page
SAFETY INFORMATION . . . . . . . . . . . . . . . 4
SAFE DRIVING RECOMMENDATIONS FOR USERS
OF MOBILE RADIOS* . . . . . . . . . . . . . . . . 5
OPERATING PROCEDURES . . . . . . . . . . . . . 6
INTRODUCTION . . . . . . . . . . . . . . . . . . . 7
CONTROLS, INDICATORS, AND DISPLAYS . . . . 9
CONTROLS . . . . . . . . . . . . . . . . . . . . 9
MENU . . . . . . . . . . . . . . . . . . . . . . . 9
DISPLAY INDICATORS . . . . . . . . . . . . . 12
The software contained in this device is copyrighted by Ericsson Inc.
Unpublished rights are reserved under the copyright laws of the United
States.
NOTICE!
2

TABLE OF CONTENTS Page
DISPLAY ALPHA INDICATORS . . . . . . . . 12
ALERT TONES . . . . . . . . . . . . . . . . . . . . 13
OPERATING THE RADIO . . . . . . . . . . . . . . 13
TURNING THE RADIO ON . . . . . . . . . . . 13
SELECT . . . . . . . . . . . . . . . . . . . . . . 14
FRONT PANEL SQUELCH ADJUSTMENT . . 14
RECEIVING A CALL . . . . . . . . . . . . . . 14
SENDING A MESSAGE . . . . . . . . . . . . . 14
SCAN OPERATION . . . . . . . . . . . . . . . . . . 15
SCAN SETUP . . . . . . . . . . . . . . . . . . . 15
RECEIVER SCAN RATE . . . . . . . . . . . . 16
USING THE RADIO WITH SCAN . . . . . . . 17
AEGIS OPERATION . . . . . . . . . . . . . . . . . 22
VOICE MODES . . . . . . . . . . . . . . . . . . 22
CLEAR MODES . . . . . . . . . . . . . . . . . 23
AEGIS DIGITAL MODE . . . . . . . . . . . . . 23
DTMF . . . . . . . . . . . . . . . . . . . . . . . 23
AEGIS VGE DIGITAL MODES . . . . . . . . . 23
TRANSFERRING KEYS INTO THE RADIO . . 24
DISPLAYING THE CURRENTLY USED
CRYPTOGRAPHIC KEY NUMBER . . . . . . 24
KEY ZERO . . . . . . . . . . . . . . . . . . . . 25
VGE DIGITAL OPERATION . . . . . . . . . . . . . 25
RECEIVING AN ENCRYPTED CALL . . . . . 25
TRANSMITTING AN ENCRYPTED CALL . . 25
Outside Address . . . . . . . . . . . . . . 26
Channel Guard . . . . . . . . . . . . . . . 26
GE•STAR . . . . . . . . . . . . . . . . . . 26
OPTIONS . . . . . . . . . . . . . . . . . . . . . . . 27
Type 99 Option . . . . . . . . . . . . . . . 27
Public Address Option . . . . . . . . . . . 27
INTERNAL/EXTERNAL SPEAKER . . . . . . 28
AVAILABLE OPTIONS . . . . . . . . . . . . . . . . 29
OPERATING TIPS . . . . . . . . . . . . . . . . . . . Back Cover
3

SAFETY INFORMATION
The operator of any mobile radio should be aware of certain hazards
common to the operation of vehicular radio transmissions.
A list of possible hazards are:
1. ExplosiveAtmospheres
Just as it is dangerous to fuel a vehicle with the motor running, be
sure to turn the radio off while fueling the vehicle. Do not carry
containers of fuel in the trunk.
2. Interference to Vehicular Electronics Systems
Electronic fuel injection systems, electronic anti skid braking sys-
tems, etc., are typical of the type of electronic devices that may
malfunctiondue to thelackof protectionfrom radiofrequencyenergy
present when transmitting. If the vehicle contains such equipment,
consult the dealer for the make of the vehicle and enlist his aid in
determining if such electronic circuits perform normally when the
radio is transmitting.
3. Dynamite Blasting Caps
Dynamiteblastingcapsmaybecausedto explodebyoperatingaradio
within 500 feet of theblastingcaps. Alwaysobeythe"TurnOffTwo
Way Radios" signs posted where dynamite is being used. When
transporting blasting caps in your vehicle:
a. Carry the blasting caps in a closed metal box with a soft lining.
b. Leave the radio OFF whenever the blasting caps are being put
into or removed from the vehicle.
4. Radio Frequency Energy
To prevent burns or related physical injury from radio frequency
energy, do not operate the transmitter when anyone outside of the
vehicle is within two feet of the antenna.
5. Liquefied (LP) Gas Powered Vehicles
Mobileradioinstallationsinvehiclespoweredbyliquefiedpetroleum
gas with the LP gas container in the trunk or other sealed-off space
4

within the interior of the vehicle must conform to the National Fire
Protection Association standard (NEPA) 58 which requires that:
a. The space containing the radio equipment shall be isolated by a
seal from the space containing the LP gas container and its
fittings.
b. OutsidefillingconnectionsshallbeusedfortheLPgascontainer.
c. TheLPgascontainershallbevented totheoutsideofthevehicle.
SAFE DRIVING RECOMMENDATIONS FOR USERS OF MOBILE
RADIOS*
Read the literature on the safe operation of the radio.
•Keep both hands on the steering wheel and the microphone in its cradle
whenever the vehicle is in motion.
•Place calls only when vehicle is stopped. Use recall dialing to speed the
time it takes to call.
•When talking from a moving vehicle is unavoidable, drive in the slower
lane. Keep conversations brief.
•If conversation requires taking notes or complex thought, stop the
vehicle in a safe place and continue the call.
Whenever using a mobile radio exercise caution.
*As recommended by the AAA
5

OPERATING PROCEDURES
Two-way FM radio systems must be operated in accordance with the rules
andregulationsoftheFederalCommunicationsCommission(FCC).Operators
of two-way radio equipment must be thoroughly familiar with the rules that
apply to the intended type of radio operation. Following these rules will help
to eliminate confusion, assurethe most efficient useof existing radio channels,
and result in a smoothly functioning radio network. When using this two-way
radio remember these rules:
1. It is a violation of FCC rules to interrupt any distress or emergency
message. As the radio operates in much the same way as a telephone
"party line", always listen to make sure that the line is clear - that no
oneelseinontheair-beforesendingmessages.Ifsomeoneissending
an emergency message - such as reporting a fire, or asking for help
in an accident - KEEP OFF THE AIR! Emergency calls have
priority over all other messages.
2. Use of profane or obscene language is prohibited by Federal law.
3. It is against the law to send false call letters, or a false distress or
emergency message.
4. The FCC requires that conversations be kept brief and confined to
business. To save time, use coded messages whenever possible.
5. Using a radio to send personal messages (except in an emergency) is
a violation of the FCC rules. Send only those messages that are
essential for business operation.
6. It is against Federal law to repeat or otherwise make known anything
overheard on the radio. Conversations between others sharing a
channel must be regarded as confidential.
7. The FCC requires the operator to identify himself at certain times by
meansofcallletters.Referto therulesthatapplytotheparticulartype
of operation for the proper procedure.
8. No changes or adjustments shall be made to the equipment except by
an authorized or certified electronics technician.
6

INTRODUCTION
This manual describes how to use the MDX Conventional Mobile Radio.
The MDX is a synthesized, microprocessor-based, high performance simplex
mobile FM radio providing reliable two-way communications. Direct mobile
to mobile communication, when out of repeater range, is also provided.
In the Conventional mode, the user selects a channel and directly
communicateson that channel.Inthismode,asystemreferstoasetofchannels
and a channel is a transmit/receive radio frequency pair.
The exact operation of the radio will depend on the operating mode, the
radio’s programming, and the particular radio system. Most features described
in this manual may be enabled or disabled through programming. Consult the
system administrator for the particular features that are programmed into your
MDX radio.
The following feature encrypted options are standard with the MDX
conventional mobile radio:
PMPL3M Serial Control Unit (Control Head Operation)
PMPL3K Scan, Dual Priority
PMPL3F 16 channel operation
PMPL3G 32 channel operation
PMPL3H 64 channel operation
PMPL3J 128 channel operation
The following feature encrypted options can also be ordered:
PMPL3C Type 99 Decode
PMPL3D Public Address and External Speaker Switch (Re-
quires option PMSU5A)
PMPL3E Emergency (GE-STAR) and GE-STAR ANI
7

Channel/SEL
Ramp scrolls through
the names of channels
programmed into the
radio, displaying them
on the Dot Matrix
display.
Two Flex Keys
give you one-touch
access to the menu or
optional features.
Optional keycaps are
available to identify
the functions of
pre-programmed
buttons, including T99
decode, Scan Add/
Delete, Public
Address, Home,
Private, External
Alarm, and display
brightness.
Front-Mounted
Microphone
Connector provides
easy access to the
microphone and
programming
capabilities.
System Key scrolls
through the names of
the system (groups of
channels) program-
med into the radio,
displaying them on
the Dot Matrix display
Front Mount
Speaker with 4 watts
of audio. An optional
10-watt external
speaker is also
available, for use in
noisy environments.
Figure 1 - MDX SCAN Radio
PWR
Volume Up/Down
Ramp sets the volume
of the received audio.
Scan Button
enables scan
operation for the
selected system.
8-Character
Alphanumeric Dot
Matrix LED
allows you to identify
channel selections by
descriptive names.
Names, menu options, and
status information are
displayed here.
MENU button allows access
to functions and options,
including scan add/delete for
modifying the radio’s scan
list and alarm on/off for the
external alarm option that
uses your horn or head lights
to signal an incoming call.
Emergency ID/ Alarm
(optional)
sends an emergency
(GESTAR) alert and
identifying code to the
dispatcher. If no emergency
function is required, this can
be programmed as a
"HOME" switch.
8

CONTROLS, INDICATORS, AND DISPLAYS
The MDX Conventional mobile radio contains ten buttons, an eight
character DOT MATRIX display and seven indicators (see Figure 1). In
addition, there are times when part of the eight character display is used to
display the radio status. Backlighting on buttons illuminate the Legends.
CONTROLS
POWER Momentary push-push switch. Press once to turn
the radio ON. Press again to turn the radio OFF.
VOLUME The momentary switches (auto ramping) VOL-
UME + and VOLUME -. Beeps each time the
VOLUME button is pressed, except when a call is
in process. Hold the button (up or down) to auto
ramp the volume.
MENU Momentary switch. The MENU button is used to
access options on the MDX mobile. Menu opera-
tion is coupled with theCHANNEL/SEL buttons
and the CLR button. To increment from one menu
selection to the next, simply press and release the
MENU button. Press the CLR button to return to
normal operation. The menu choices are listed
below with a description of how to change the
choices (Note: You may have some or all of these
menu choices programmed in your radio, and they
may be programmed in a different order than pre-
sented here).
BACKLIGHT: Press the MENU button until
"BRIGHT" appears in the display. To change the
state of the backlight press the CHANNEL/SEL +
or - button.
PUBLIC ADDRESS: Press the MENU button
until "PUB ADDR" appears in the display. Press
PTT to transmit in PA mode.
SCAN ADD/DELETE: Press the MENU button
until "SCAN A/D" appears in the display. Use the
CHANNEL/SEL- button to step through the
group selections for the current system. Use the
CHANNEL/SEL + button to change the scan
state. An "S" is illuminated to the right of the
display if the group/channel has SCAN enabled.
9

System Switch scrolls
through the names of
the systems and/or
channels program-
med into the radio,
displaying them on
the Dot Matrix
display.
Two Flex Keys
give you one-touch
access to the menu or
optional features.
Optional keycaps are
available to identify
the functions of
pre-programmed
buttons, including
Scan Add/ Delete,
Public Address,
Home, Private,
External Alarm, and
display brightness.
Front-Mounted
Microphone
Connector provides
easy access to the
microphone and
programming
capabilities.
System Keypad
10-watt external
speaker must be used
with the System
model.
Figure 2 - MDX System Radio
8-Character
Alphanumeric Dot
Matrix LED
allows you to identify
channel selections by
descriptive names.
Menu options, and status
information are displayed
here.
MENU button allows access
to functions and options,
including scan add/delete for
modifying the radio’s scan
list and alarm on/off for the
external alarm option that
uses your horn or head lights
to signal an incoming call.
Emergency ID/ Alarm
(optional)
sends an emergency alert and
identifying code to the
dispatcher. If no emergency
function is required, this can
be programmed as a
"HOME" switch.
PWR
Volume
Scan Button
CONTROLS, INDICATORS, AND DISPLAYS
Channel/SEL
Ramp
10

CONTROLS (CONT’D)
MENU - Cont. ALARMON/OFF: PresstheMENUbuttonuntil
"ALM ON" or "ALM OFF" appears in the display.
Press the CHANNEL/SEL + or -buttons until the
desired state is selected. (Note: This enables or
disables the external alarm, e.g. horn or lights.)
SQUELCH Press and hold "Scan" button, use "volume" up to
loosen squelch and down to tighten squelch.
SYS Momentary switch. The SYS (SYSTEM) button is
used to select system changes. System may be
incremented by pressing and releasing the SYS
button. Alternately, when the display shows the
Systemname,theCHANNEL/SELbuttonsmaybe
used to increment or decrement the system selec-
tions.(NOTE: Theradiomaybeprogrammedwith
wrap around on the system selection; this would
allow the radio to switch from the highest to lowest
system with one change instead of ramping all the
way through the list.)
CHANNEL/SEL Ramp Switch. The CHANNEL/SEL button is
usedtoincrementordecrementthecurrentchannel
selection. It is also used as described above to
increment/decrement the System. In conventional
mode, these buttons change the channel selection.
CLR Momentaryswitch. TheCLRbutton is used to exit
from the menu operation, monitor a conventional
channel or end a special/individual call.
HOME/
EMERGENCY Momentary switch. The HOME or EMER- GENCY button is used to select a homesystem,or
channel. The radio may be programmed to revert
to a particular system or channel within the se-
lected or home system. Itmay also beprogrammed
to send an emergency message (GESTAR) when
pressed and held for approximately one second
(either on the selected system or on the Home
system).
FLEX KEYS
A1, A2 The auxiliary buttons are used to access frequently used menu selections quickly. They can also be
programmed as a HOME, External Alarm, Public
Address,T99decode,Private,andScanadd/delete.
11

NUMERIC KEYS
1-9, 0, *, # On system radio, the twelvebutton keypad permits transmission of DTMF digits.
DISPLAY INDICATORS
The radio’s display is shown in Figure 3. The character line is used to
display system or area and group or channel names and also operational
messages to the user. The line contains eight Dot Matrix LED characters. The
7 status indicators are used to show the various operating conditions of the
radio.
TX On indicates the radio is transmitting.
BSY Lights when a channel is busy (RF carrier present).
SCN ON indicates scan is enabled.
S ON indicates channel in scan list.
P1 ON indicates selected channel is a priority 1 chan-
nel.
P2 ON indicates selected channel is a priority 2 chan-
nel.
PVT ON indicates selected channel has been pre-pro-
grammed for AEGIS operation. Flashes indicates
receiving an encrypted digital voice call.
DISPLAY ALPHA INDICATORS
The radio is capable of displaying status indicators in the alpha display.
Some of these messages will use the entire display while others use only two
or three characters.When the short message is displayed, it may be on the right
or left of the display (PC programmable). It is separated from the normal
information with an indicator such as an asterisk ("*").
T99 T99 call received alternates with current channel
display.
T99 On Menu display indicating T99 option is enabled.
Figure 3 - Sample MDX Display
12

DISPLAY ALPHA INDICATORS - Cont.
T99 Off Menu display indicating T99 option is disabled.
Pub Addr Public address option enabled.
ALERT TONES
The MDX Conventional mobile radio generates a set of unique alert tones
to indicate operating status. The following section identifies and describes the
alert tones used in the MDX radio.
SELF CHECK
TEST ALERT One beep is sounded after the radio is turned on to indicatethattheradiohaspassedtheselfdiagnostic
test. Optional in PC programmer.
CALL DISABLED
ALERT You will hear a continuous low pitched tone when your radio is set to a receive (decode) only channel
and you press PTT on the microphone. This tone
indicates that you are not allowed to place a call on
this setting.
CARRIER CONTROL
TIMER TheCarrierControlTimeralertisapulsingpitched toneyouwillhearwhenever you have keptthePTT
button continuously pressed for a preprogrammed
length of time. The transmitter shuts down when
the pulsing low pitched tone starts, interrupting
communications.Tomaintaincommunications,re-
lease and re-key the microphone. This resets the
timer and turns the transmitter back on. The CCT
is a built in precaution against extended use of the
system.
T99 CALL RECEIVED After decoding a T99 call, the received signalling
2-tone is sounded to alert you of the incoming call.
OPERATING THE RADIO
TURNING THE RADIO ON
1. Push the POWER switch. The display shows the channel alpha name
once power up is complete. When powering up, the last selected
Channel should be displayed unless the radio is programmed for a
preprogrammedpowerup.Theradiooptionallygeneratesabeeponce
the power up sequence is complete.
13

2. Set the volume using the VOLUME RAMP button. A short beep
sounds each time the VOLUME button is pressed.The beeps willnot
sound if a call is being received.
SELECT
Toselectadifferentchannelwhenyouhaveselectedaconventionalsystem:
1. Press the CHANNEL/SEL + or - ramp button until the desired
channel name appears in the alphanumeric display. A tone sounds
each time the channel name changes unless the BSY indicator is on.
FRONT PANEL SQUELCH ADJUSTMENT
The squelch setting of the radio can be adjusted by the user through the
front panel controls. There are a total of 256 steps used internally to the radio
for the squelch level adjustment. The front panel allows adjustment through a
portion of that range.
With the radio on a conventional channel, press and hold the SCN button.
ThenusetheVOLUMErampbuttontoopenandclosethesquelch.Aftersetting
the squelch to the desired setting, release the SCN button to return the radio to
normal operation.
RECEIVING A CALL
1.Make sure that the radio is turned ON, and the proper channel is
selected using the CHANNEL/SEL + or - ramp button and the SYS
button.
2. Press the CLR button to monitor the channel. Noise will be heard if
there is no activity on the channel. This function is also useful for
setting the desired volume level.
3. You will hear the voice message automatically if a valid message is
received by your radio.
SENDING A MESSAGE
1. MakesuretheradioisturnedON,andtheproperChannelandSystem
have been selected.
2. PressandholdtheCLRswitch andthenadjusttheVOLUMEcontrols
for the desired listening level. Release CLR switch.
14

3. Decide what you want to say. If you intend a lengthy message (or
several messages), the vehicle engine should be running to maintain
the battery charge.
4. Observe the BSY indicator and then press CLR the switch to assure
that the channel is not in use.
5. Remove microphone from the hanger, press the PTT switch and
identify yourself. The indicator will be shown each time the
PTT switch is pressed.
6. Release the PTT switch and wait for an answer to your call. Then
complete your message.
7. When the PTT switch is pressed continuously for a pre-programmed
time (default of 30 seconds), the carrier control timer (if enabled) will
sound a pulsed alert tone and unkey the transmitter. Release and press
the PTT switch again to reset the timer and resume conversation.
SCAN OPERATION
SCAN SETUP
You may program your radio to scan a number of Channels for activity on
the selected system.
Starting Or Stopping SCAN
Press the SCAN button to alternate between Scan on (SCN indicator
illuminated) and Scan off (indicator dark).
Adding/Deleting To/From SCAN
SCAN should be off before changing the SCAN list.
1. Press the menu button until SCAN A/D is displayed.
2. Press the CHANNEL/SEL (-) button until the CHANNEL name is
displayed.
TX
Always speak in a normal tone of voice. Hold the microphone
cupped in your hand and touching your cheek lightly. Speak
across the face of your microphone, not directly into it. Shouting
will degrade your transmission, so do not speak any louder than
normal.
NOTE
15

3. Press the CHANNEL/SEL (+) button until the desired priority level
is displayed by the scan priority indicators on the right side of the
display;thechoicesareS,P2;P1oralloff(alloffremovesthechannel
from the SCAN list).
4. Press the CLR button when completed to return to normal operation.
IfyourradiohasoneoftheauxiliarykeyspreprogrammedtoedittheSCAN
list, the list may be changed by using the CHANNEL/SEL buttons to display
the CHANNEL name, and then pressing the auxiliary key until the desired
level is displayed.
The SCAN function allows monitoring of up to 16 receive channels on the
selected system. The scanned channels may be any frequency within the
frequency band limits of the radio and may be Channel Guard protected. All
scan functions are retained in memory, even if the 12 Volt vehicle battery is
disconnected.
Any channel may be scanned with or without a priority level. One channel
may be programmed for Priority 1 (P1) and another for Priority 2 (P2) with
any or all remaining channels programmed as non-priorities.
RECEIVER SCAN RATE
Thescanratefortheradiowillvarydependinguponthenumberofchannels
programmed into the scan list and whether or not Channel Guard is
programmed. The scan rate will be faster when fewer channels are program-
med into scan memory.
1. The radio will remember the scan state through a power cycle
unless programmed with a predefined power up state.
2. The radio may be programmed to stop scanning when the
microphone is removed from the hookswitch.
3. When the radio is programmed, a FIXED SCAN list can be
specified. If this is done, the SCAN list cannot be changed.
4. A previous channel with priority will become a non-priority scan
channel when a new priority channel is programmed.
NOTES
16

Scan operation will be determined by the following conditions:
•PRIORITY 1, PRIORITY 2 and NON-PRIORITY PROGRAMMED
The Priority 1, Priority 2 and up to 14 remaining channels will be
scanned. Once a carrier is detected (and if programmed, the correct
Channel Guard is decoded), the display will indicate that channel.
Sampling of the Priority 1 and Priority 2 channels continues while
receiving a message. Should a Priority 1 or 2 channel carrier (and correct
Channel Guard) be detected while a non-priority channel is being
received, the applicable indicator, P1 or P2 lights, and the channel is
switched to the Priority 1 or 2 channel regardless of what is being
received on the non-priority channel.
•NON-PRIORITY PROGRAMMED
Up to 16 non-priority channels may be scanned. Once a carrier is
detected (or correct Channel Guard is decoded) the digital display will
indicate that channel. Scanning will stop andremain on thechannel until
the carrier disappears; after a few seconds scanning resumes. The
channels are scanned in descending order.
USING THE RADIO WITH SCAN
The Selected Channel
The SELECTED channel is the channel in the display when scan is turned
on by pushing the SCAN switch. When asignal isnot being received, the radio
reverts to this channel for transmitting. When a signal is being received, the
radio can be PC programmed to either revert to the SELECTED channel or
remain on the received channel for transmission.
The SELECTED channel does not necessarily have to be a channel in the
scan list. The SELECTED channel will be temporarily entered into the scan
list and scanned until the SELECTED channel is changed.
When scan is turned off by pushing the SCAN switch, the radio will return
to the SELECTED channel.
Display
Channel indicator
While no signal is being received, the channel indicator will always show
the SELECTED channel. When an active channel is received, the channel
indicator will show the received channel.
17

SCN indicator
When the SCAN button is pushed, the radio will light the SCN indicator
and begin scanning. The SCN indicator will flash when the microphone is
placed off-hook to show the radio is no longer scanning (only if the radio is
PC programmed not to scan off-hook).
Transmitting While In Scan:
Transmitter operation in scan is determined by the PC programming of the
radio’s personality. A flow chart is provided in this section to summarize the
scan operation described below.
•Off-hook scan not enabled (default):
With off-hook scan not enabled (normal default condition), allscanning
will stop when the microphone is placed off-hook. The SCN indicator
will flash to show all scanning has stopped. If a signal is not being
received when the mic is placed off-hook, the radio will transmit on the
SELECTEDchannel.Ifasignalisbeingreceivedwhenthemicis placed
off-hook, the radio can be PC programmed (using the "scan transmit
option")toeitherstayonthereceivechannelorreverttotheSELECTED
channel. When the mic is placed back on-hook, the radio will
immediately start scanning, even if the received channel was still active.
•Off-hook scan enabled:
With off-hook scan enabled, moving the microphone off-hook will not
affect scan operation. The radio will continue scanning. If a signal is not
being received, the radio will transmit on the SELECTED channel. If a
signal is being received, the radio can be PC programmed (using the
"scan transmit channel" option) to either stay on the receive channel or
revert to the SELECTED channel when the mic PTT is keyed.
•On-hook
When the microphone is on-hook (in the microphone hanger) and the
radio is not receiving a channel, the radio always transmits on the
SELECTED channel.
When the radio is receiving a channel the radio’s personality can be pro-
grammed to transmit either on the received channel or the SELECTED
channel. If the radio was programmed for the SELECTED channel, the
display changes to the SELECTED channel when the transmitter is
keyed.
18

Monitor (CLR) Switch Operation In Scan
The CLR switch does not operate while scanning inactive channels. When
a channel becomes active, the CLR switch operates only during the scan hang
time after the channel activity disappears.
Channel Changes In Scan
Pushing the channel switches (UP or DOWN) while scan is turned on will
change the SELECTED channel assignment. If a signal is being received and
the channel switches are pushed, the radio will revert to the new SELECTED
channel assignment. After 2 seconds, if no activity appears on the new
SELECTED channel, scanning will resume. If the SELECTED channel is
changed to a channel not in the scan list, the new channel will be temporarily
added to the scan list until the SELECTED channel is changed again.
•Temporary channel deletions
The SCAN function must be turned off to make any permanent changes
(additions, deletions, re-priorizations) to the scan list. While in scan,
temporary channel deletions may be made to the scan list. The original
scan list will be back in effect by either turning scan off (by pushing the
SCAN switch ) or by turning the radio power off and back on.
When the radio stops scanning on an active channel, the channel may
be temporarily deleted by holding the SCAN switch and then pressing
the CHANNEL/SEL (−) switch. The radio will immediately resume
scanning while skipping over the temporarily deleted channel.
Temporary deletions cannot be made until the radio stops on an active
channel. P1 and P2 channels cannot be temporarily deleted.
19

20