Ericsson Voice Guard M-Pa SCAN User manual

M-PASCAN MODEL
PORTABLE RADIO
(VGE ALGORITHM)
LBI-38690A
Operator’s Manual
E

Copyright© December 1991, Ericsson GE Mobile Communications Inc.
TABLE OF CONTENTS
Page
INTRODUCTION . . . . . . 4
CONTROLS . . . . . . . . 5
ON/OFF SWITCH . . . . 5
VOLUME CONTROL
KNOB . . . . . . . . . . . 5
CONTROL KNOB . . . . 5
PTT BUTTON . . . . . . 5
MONITOR BUTTON . . . 7
EMERGENCY BUTTON . 7
MENU BUTTON . . . . . 7
PRIVATE BUTTON . . . . 8
TABLE OF CONTENTS - Cont.
Page
EXIT BUTTON . . . . . . . 9
SCAN BUTTON . . . . . . 9
SELECT BUTTON . . . . . 9
INDICATORS . . . . . . . . . 10
UNIVERSAL DEVICE
CONNECTOR . . . . . . . . 12
ALERT TONES . . . . . . . . 12
CARRIER CONTROL
TIMER . . . . . . . . . . . 12
CHANNEL BUSY . . . . . 13
RECEIVE ONLY
CHANNEL . . . . . . . . . 13
VOICE GUARD
DISABLED . . . . . . . . . 13
RADIO/CHANNEL
FAILURE . . . . . . . . . . 13
OPERATION . . . . . . . . . 13
POWER-UP . . . . . . . . 13
MODE/CHANNEL/CG
SELECTION . . . . . . . . 14
This manual is published by Ericsson Inc., without any
warranty. Improvements and changes to this manual ne-
cessitated by typographical errors, inaccuracies of cur-
rent information, or improvements to programs and/or
equipment, may be made by Ericsson Inc., at any time
and without notice. Such changes will be incorporated
into new editions 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 writ-
ten permission of Ericsson Inc.
2

TABLE OF CONTENTS - Cont.
Page
CRYPTOGRAPHIC
KEYHANDLING . . . . . 15
RECEIVING A
MESSAGE . . . . . . . . 17
TRANSMITTING A
MESSAGE . . . . . . . . 18
EMERGENCY
OPERATION . . . . . . . 20
SCANNING
CHANNELS . . . . . . . 20
Using Scan . . . . . . . . 22
TELEPHONE
INTERCONNECT
CALLS . . . . . . . . . . 23
"KEYLOCK" MENU . . . 24
"ALERT" MENU . . . . . 25
OPERATING TIPS . . . . . 25
OPERATING RULES AND
REGULATIONS . . . . . . . 26
BATTERY PACKS . . . . . . 28
INSTALLING THE
BATTERY PACK . . . . . 28
TABLE OF CONTENTS - Cont.
Page
REMOVING THE
BATTERY PACK . . . . . . 28
CHARGING THE
BATTERY PACKS . . . . . 28
RECHARGEABLE BATTERY
PACK DISPOSAL . . . . . 30
SWIVEL MOUNT REMOVAL AND
REPLACEMENT . . . . . . . 30
INTRINSICALLY SAFE
USAGE . . . . . . . . . . . . 30
BATTERY PACKS . . . . . 31
ACCESSORIES . . . . . . 31
GLOSSARY . . . . . . . . . 32
WARRANTY . . . . . . . . . 38
NICKEL-CADMIUM BATTERY
WARRANTY . . . . . . . . . 39
3

INTRODUCTION
This manual describes the opera-
tion of the M-PAVoice Guard®Scan
model radio. This full-featured portable
radio provides Voice Guard two-way
communications using the VGE algo-
rithm. The M-PA Voice Guard radio pro-
vides full-range performance for private
(guarded) and clear communications.
The cryptographic key in the radio
provides the encryption and decryption
code necessary for private communica-
tions.Only radios with the same crypto-
graphic key can monitor and
communicate. Cryptographic keys are
transferred into the radio using VGE
Keyloader, Option V4028. VGE
equipped Voice Guard radios must also
be programmed with identical CUE
(Customer Unique Encryption) code(s)
before private communications are pos-
sible. CUE codes are programmed into
the radio along with the overall person-
ality information using an IBM PC or
compatible computer.
Operating controls on the radio in-
clude a rotatable control knob, rotatable
volume control, 4-button keypad, push-
to-talk, emergency and monitor buttons.
The on/off power switch for the unit is
located on the removable battery pack.
The 8-digit alphanumeric liquid
crystal display (LCD) on the front of the
radio displays the operating status of
the radio. This backlit display also has
twelve status flags that indicate various
operating conditions such as private
communications enabled, transmitter
on, scanning, or emergency mode en-
abled.
The exact operation of your radio
will vary depending upon the mode of
operation, the radio’s programming, and
the particular radio system. Consult
your radio system’s representative for
4

particular features that are programmed
into your radio.
CONTROLS
ON/OFF SWITCH
The ON/OFF SWITCH is located
on the battery pack. Sliding this switch
up will supply power to the radio from
the battery pack. An audible click will be
heard and the "ON" indicator will be ex-
posed. When the radio is turned on, it
will perform a power-up self test and
then resume operation on the previous
operating channel as displayed in the
LCD. Sliding the switch down will turn
the radio off
VOLUME CONTROL KNOB
The VOLUME CONTROL KNOB is
a rotatable control on the top of the ra-
dio used to adjust the receiver’s audio
level in the speaker. Rotating this knob
in a clockwise direction will increase the
audio level. Counter-clockwise rotation
will decrease the audio level Minimum
levels may be programmed into the ra-
dio to prevent missed calls due to too
low of a volume setting.
CONTROL KNOB
The rotatable 16-position CON-
TROL KNOB located on the top of the
radio is programmed to select the oper-
ating channel, mode, or specific Chan-
nel Guard encode/decode tones. See
MODE/CHANNEL/CG SELECTION for
details. A stop plate may be installed
under the knob to limit the maximum
number of positions to less than sixteen
(16). It is normally factory installed for
fifteen (15) positions. Some radios may
be programmed with this knob disabled.
PTT BUTTON
Pressing the PTT BUTTON on the
side of the radio will enable the radio’s
transmitter. The "TX" status flag in the
display will turn on when the radio is
5

Figure 1 - M-PA Scan Model Radio
6

transmitting. Releasing the PTT BUT-
TON will return operator to receive
mode.
MONITOR BUTTON
The MONITOR BUTTON is used to
unsquelch the receiver. Momentarily
pressing this button will disable squelch
and the receiver noise will be heard in
the speaker.
If programmed enabled for the se-
lected channel, Channel Guard (CG)
and/or Type 99 (T99) signaling will be
enabled when the channel is selected.if
CG and/or T99 are enabled, the appro-
priate status flag "CG" and/or "T99" will
turn on. The MONITOR BUTTON may
then be used to toggle CG and/or T99
between disabled and enabled by
pressing and holding it for at least one
(1) second; the appropriate status flag
will toggle on or off The MONITOR
BUTTON is also used to reset T99 op-
eration after a call is received.
EMERGENCY BUTTON
The EMERGENCY BUTTON is the
small red button located on top of the
radio near the antenna. If this button is
programmed for emergency operation,
pressing it for at least one (1) second
will cause the radio to transmit GE-
STAR emergency signaling. The "EMG"
status flag will turn on. GE-STAR is
transmitted according to one of several
different programmable methods. See
EMERGENCY OPERATION for de-
tails.
This button may also be pro-
grammed as a home mode button. if
programmed in this manner; pressing it
will switch operation to the programmed
home mode.
MENU BUTTON
Pressing the MENU button causes
the radio to scroll through up to six (6)
different menus programmed into the
7

radio. After the desired menu is dis-
played, the feature within the menu is
selected with the SEL button. The
menus that may be programmed are:
Menu Display Function Or Use
"CHANNEL" The MENU and SEL
buttons are programmed
for channel selection.
When this display ap-
pears, select the desired
channel with the SEL
button and then press
EXIT.
"MODE" The MENU and SEL
buttons are programmed
for mode selection.
When this display ap-
pears, select the desired
mode by pressing the
SEL button and then
press EXIT.
"PHONE" Allows selection of one
(1) of the ten (10) pro-
grammed telephone
numbers for automatic
dialing.
"KEYLOCK" Allows the keypad but-
tons to be locked or un-
locked.
"SCAN A/D" Allows channels to be
added to or deleted from
the scan list for the cur-
rent mode. The priority-
one channel and the
priority-two channel are
also set within this
menu.
"ALERT" Allows the alert tones to
be disabled or enabled.
PRIVATE BUTTON
Private transmit mode is enabled or
disabled by pressing and releasing the
8

PVT button (when the menu mode is
not selected). When private transmit
mode is enabled, the "PVT" status flag
in the display will turn on.
If the radio is programmed for
forced private operation and the se-
lected channel is programmed for pri-
vate operation, "FRCD PVT" will be
displayed when PVT is pressed; private
transmit mode is not disabled. If the ra-
dio is programmed for forced private op-
eration and the selected channel is not
programmed for private operation, "VG
DISBL" will momentarily show in the
display when PVT is pressed; the radio
will not change to private mode.
EXIT BUTTON
Pressing the EXIT button will cause
the radio to exit the current menu dis-
play and return operation to the channel
currently selected. If the menu mode is
not enabled when the button is pressed,
pressing this button will turn the display
and keypad backlighting on for thirty
(30) seconds (if the backlight is pro-
grammed on).
SCAN BUTTON
Pressing the SCAN button on the
keypad will toggle scan operation on
and off. When the radio is scanning, the
"SCN" status flag in the display will
show and all channels on the scan list
will be scanned. See SCANNING
CHANNELS for additional details.
SELECT BUTTON
Selecting different features within
each menu is accomplished with the
SEL button. First, the menu mode must
Figure 2 - MPA Scan Model Keypad
9

be enabled and the desired menu must
be chosen by pressing and releasing
the MENU button until the desired
menu appears in the display After the
menu is chosen, the desired function or
feature is selected by pressing the SEL
button. For example, to disable or en-
able the alert tones, press MENU until
"ALERT" is displayed then press SEL to
select "ENABLED"or "DISABLED", as
desired. Next press the EXIT button.
INDICATORS
The radio’s liquid crystal display
(LCD) located on the front panel has
eight (8) alphanumeric characters and
twelve (12) status flags. This display in-
dicates the current operating channel
and it displays the menu information
when this mode is enabled. It also dis-
plays various other messages.
LCD backlighting will turn on for a
short period anytime an active button is
pressed or the CONTROL KNOB is ro-
tated. Backlighting may be programmed
to remain off at all times. Pressing the
EXIT button when the menu mode is
not enabled, will turn display and key-
pad backlighting on for thirty (30) sec-
onds (if backlight programming is on).
The twelve (12) status flags located
along the top and bottom of the display
indicate operating status as follows:
EMG EMerGency mode - On indi-
cates emergency GE-STAR sig-
naling has been initiated by the
user.
HI HIgh power transmit - On indi-
cates the selected channel has
Figure 3 - Liquid Crystal Display
10

been programmed for high
power transmit operation. Off in-
dicates low power transmit.
T99 Type 99 tone decode-On indi-
cates Type 99 tone decoding is
enabled on the selected chan-
nel. Flashing indicates a T99 se-
lective call has been received
and the radio must be reset to
receive another T99 call.
PVT PriVaTe mode - On indicates pri-
vate mode is enabled and the
radio will transmit encrypted
messages on the selected chan-
nel. Flashing indicates an en-
crypted message is being
received.
TX Transmitter enabled - On when
the radio is transmitting.
BSY BuSY - On indicates a carrier is
being received (the channel is
busy). Note that if the selected
channels programmed for Chan-
nel Guard (CG), Digital Channel
Guard (DCG), or Type 99 (T99)
tone decode operation, the radio
may not unsquelch if a valid
tone(s) is not received; the BSY
status flag will be on.
CG Channel Guard - On indicates
tone Channel Guard (CG) or
Digital Channel Guard (DCG)
encode/decode is enabled on
the selected channel.
BAT BATtery low - On indicates the
battery pack’s charge is low.
SScan list - On indicates the se-
lected channel is on the scan
list.
1priority 1 - On indicates the se-
lected channel is designated as
the priority-one scan channel.
11

2priority 2 - On indicates the se-
lected channel is designated as
the priority-two scan channel.
SCN SCaN mode - On indicates the
radio is scanning.
UNIVERSAL DEVICE CONNECTOR
The Universal Device Connector
(UDC) is located on the side of the ra-
dio just above the PTT and MONITOR
BUTTONS. This connector provides
connections for the external accesso-
ries such as a headset, a speaker-mike,
or an emergency lanyard. When the ra-
dio is locked in a vehicular charger/re-
peater, the UDC provides the audio and
control connections between the radio
and the vehicular charger/repeater. The
UDC is also used by the maintenance
personnel when the radio is pro-
grammed.
ALERTTONES
The M-PA uses alert tones or
"beeps" to indicate various operating
conditions. Alert tones may be enabled
or disabled via the menu mode if the
"ALERT" feature is programmed. See
"ALERT" MENU for details. The alert
tones may be disabled when the radio
is programmed.
CARRIER CONTROL TIMER
This feature, programmable on a
per channel basis, prevents unneces-
sary channel traffic and radio damage
in the event of a "stuck" mic. If the pro-
grammed timer times-out during a
transmission, the radio will sound an
alert tone and disable the transmission.
The beeping tone will continue until the
PTT BUTTON is released. Releasing
the PTT BUTTON resets the timer.
12

CHANNEL BUSY
If the radio is receiving a signal
when the PTT BUTTON is pressed, an
alert tone will warn the operator that the
radio is receiving a carrier and the
transmission will not occur. "RX BUSY"
is displayed and the alarm is sounded
as long as the PTT BUTTON is
pressed. This feature is programmable
on or off on a per channel basis.
RECEIVE ONLY CHANNEL
If the selected channel is pro-
grammed as receive only, the radio will
sound an alert tone if a transmission is
attempted. "RX ONLY" is displayed.
VOICE GUARD DISABLED
If the selected channel is pro-
grammed for private operation and pri-
vate transmit mode has been disabled
using the PVT button, the radio will
sound a low-pitched beep when the
PTT button is pressed. This warns the
operator of the clear mode transmis-
sion.
RADIO/CHANNEL FAILURE
If the synthesizer is unable to lock
correctly on the selected channel, or
another radio failure occurs, an alert
tone will sound. If incorrect program-
ming is detected or the synthesizer fails
to lock, the display flashes "NO LOCK"
then the selected channel’s name.
OPERATION
POWER-UP
After the battery pack and antenna
have been installed, turn the radio on
by sliding the ON/OFF SWITCH on the
battery pack up. After the radio has
completed power-up self-test, it will be-
gin operation on the last operating state
as displayed in the LCD. If programmed
on, the power-up alert tone (beep) will
be heard.
13

MODE/CHANNEL/CG SELECTION
The M-PA Scan model radio may
be programmed with up to 176 different
radio channels. A maximum of 11
modes of 16 channels each or 16
modes of 11 channels each may be
programmed into the radio (11 x
16=176). Select the desired mode
(bank of channels) and channel, or
channel and Channel Guard (CG), ac-
cording to the radio’s programming as
follows:
MENU And SEL Selects Mode
CONTROL KNOB Selects Channel
(And CG)
1. Press the MENU button until
"MODE" appears in the display.
2. Press the SEL button to select
the desired mode. The selected
mode’s name will appear in the
display.
3. Press the EXIT button to switch
radio operation to the selected
mode and exit the menu.
4. Select the desired channel by
rotating the CONTROL KNOB
until the desired channel’s name
appears in the display.
CONTROL KNOB Selects Mode
MENU And SEL Selects Channel
(And CG)
1. Select the correct mode by ro-
tating the CONTROL KNOB un-
til the desired mode’s name
appears in the display.
2. Press the MENU button until
"CHANNEL" appears in the dis-
play.
3. Press the SEL button until the
desired channel’s name appears
in the display.
14

4. Press the EXIT button to switch
radio operation to the displayed
channel and exit the menu.
MENU and SEL Select Mode. And
Channels CONTROL KNOB Select.
Channel Guard
1. Press the MENU button until
"MODE" appears in the display.
2. Press the SEL button until the
desired mode’s name appears
in the display.
3. Press the MENU button until
"CHANNEL" appears in the dis-
play.
4. Press the SEL button until the
desired channel’s name appears
in the display.
5. Press the EXIT button to switch
radio operation to the new mode
and channel, and exit the menu.
6. Select the desired Channel
Guard using the CONTROL
KNOB. The "CG" status flag will
turn on if the selected position
has CG programmed. Position
fifteen (15) is a non-CG position;
it may not be programmed with
a Channel Guard. Position six-
teen (16) is a default channel
CG position; selecting it will
switch CG to the CG pro-
grammed for the selected chan-
nel.
CRYPTOGRAPHIC KEYHANDLING
Cryptographic keys are transferred
into the radio using the Keyloader, Op-
tion V4028. Refer to the Keyloader op-
erator’s manual (LBI-31685) for detailed
instructions on how to load keys into the
Keyloader.
The radio is capable of storing up to
seven (7) different cryptographic keys in
15

its memory. It is programmed for key se-
lection on a channel or per mode basis.
Transferring Keys Into The Radio
The following procedure outlines
basic key transferring steps. See LBI-
31685 for more details.
1. Turn the radio off.
2. Plug the modular connector of
the Keyloader cable into the
Keyloader’s modular jack.
3. Connect the Keyloader cable to
the UDC on the radio.
4. Press the PWR button on the
Keyloader and waft for the Key-
loader to display "MASTER
MODE".
5. Press the TRN button on the
Keyloader. If necessary, select a
different cryptographic key to be
transferred into the radio.
6. Turn the radio on. The display
should read "KEY LOAD".
7. Press the EXE button on the
Keyloader to transfer the key
The Keyloader will display
"GOOD 1.x TRANSFER" where
“x” is the selected cryptographic
key number.
8. Disconnect the cable from the
radio’s UDC. A single beep will
be heard from the radio’s
speaker if the power-up alert
tone is enabled. The radio will
Before private messages can be sent
or received, one or more crypto-
graphic keys must be transferred into
the radio from the Keyloader.
NOTE
16

change to the selected channel
last indicated in the display.
Key Zero
All cryptographic keys stored in the
radio can be zeroed or "dumped" when
the radio is on by simultaneously press-
ing the MENU and SCAN buttons for at
least one second. When the key(s)
have been zeroed, the radio will display
"KEY ZERO" and it will emit a series of
beeps. CUE codes stored in the radio
are not affected. If the cryptographic
key(s) are zeroed, one or more keys
must be transferred into the radio from
the Keyloader before private communi-
cations may continue.
RECEIVING A MESSAGE
1. Slide the ON/OFF SWITCH on
the battery pack to the on posi-
tion. The radio will initiate and
complete the power-up self-test
and beep if the power-up alert
tone is programmed on.
2. Select the desired operating
mode, channel, and/or Channel
Guard. See the MODE/ CHAN-
NEL/ CG SELECTION for de-
tails.
3. Press the MONITOR BUTTON
to disable squelch and adjust
the VOLUME CONTROL for the
approximate desired speaker
audio level. Pressing the MONI-
TOR BUTTON may affect Chan-
nel Guard and/or Type 99 tone
operation if programmed for the
selected channel.
4. If the selected channel is pro-
grammed for private operation,
the radio will automatically
switch between clear or private
receive operation.
17

When an encrypted transmis-
sion is received, the "PVT"
status flag will flash, the receiver
will unsquelch, and the Voice
Guard message will be heard in
the speaker. For this to occur,
the selected channel must be
programmed for private opera-
tion, the correct cryptographic
key must be loaded into the ra-
dio and the correct CUE code
must be programmed.
If a clear mode (non-encrypted)
transmission is received, the re-
ceiver will unsquelch and it will
be heard in the speaker. How-
ever, if the selected channel is
programmed for Channel Guard
or Type 99 tone operation, the
receiver will not unsquelch un-
less the correct CG or T99 tone
is received.
5. Adjust the volume as necessary.
TRANSMITTING A MESSAGE
1. Select the desired mode, chan-
nel, and/or Channel Guard.
2. When private mode is enabled,
the "PVT" status flag in the dis-
play will turn on. Toggle transmit
operation to private or clear, as
desired, by pressing the PVT
button (when the menu mode is
not enabled).
If a channel is not programmed
for private mode operation, "VG
DISBL" will momentarily show in
the display if an attempt is made
to enable private transmit mode.
It is not possible to operate on
this channel in private mode.
If the radio is programmed for
forced private operation, "FRCD
PVT" will momentarily show in
the display. If an attempt is
made to disable private transmit
18

mode. It is not possible to trans-
mit on this channel in clear
mode.
If a channel programmed for pri-
vate operation is selected and
there is no key in the radio for
the selected channel "NO KEY
x" (where "x" is the key number)
will periodically flash in the dis-
play. If a transmission is at-
tempted, "NO KEY x" will show
in the display and the radio will
emit a series of beeps and will
not transmit.
3. Ensure no one is transmitting on
the selected channel by press-
ing the MONITOR BUTTON to
disable squelch or observing the
display for the absence of the
"BSY" status flag. If the Channel
Busy Lockout feature is pro-
grammed for the selected chan-
nel, the radio will not transmit
when the channel is busy.
4. Press and hold the PTT BUT-
TON. If the selected channel is
programmed for private opera-
tion and clear transmit mode
has been selected, an alert tone
(low pitched beep) will be heard
in the speaker when the PTT
BUTTON is pressed as a warn-
ing that radio is not in private
mode. The "TX" and "BSY"
status flags are displayed.
5. Hold the radio approximately
three inches from your mouth
and speak into the microphone
in a normal voice.
6. Release the PTT BUTTON
when the transmission is com-
plete. If the transmission ex-
ceeds the programmed Carrier
Control Timer limit, the radio will
unkey and an alert tone will
sound.
7. Listen for a reply.
19

EMERGENCY OPERATION
The radio may be programmed to
transmit GE-STAR emergency signaling
when the EMERGENCY BUTTON is
pressed or from a UDC connected lan-
yard. If the EMERGENCY BUTTON is
programmed for GE-STAR emergency
activation, press for approximately one
(1) second to activate the transmission.
If the lanyard is programmed for activa-
tion, follow the instructions provided
with it. GE-STAR is programmed to
transmit in one of the following meth-
ods:
••GE-STAR is transmitted on
predetermined mode and channel
regardless of the selected channel.In
this case the selected channel is
available for voice and the radio will
periodically "jump" to the
predetermined channel and send the
emergency message and then "jump
back" to the selected channel for
voice operation.
••GE-STAR is transmitted on the
selected channel. If the channel is
changed, the emergency bursts will
follow the newly selected channel.
••The radio switches to and stays on a
predetermined mode and channel
and GE-STAR is transmitted on that
channel. Rotating the CONTROL
KNOB will not change channels.
Turning the radio off and back on will
reset this condition.
••GE-STAR is sent on the selected
channel and the radio locks onto that
channel. Rotating the CONTROL
KNOB will not change channels.
Turning the radio off and then back
on will reset this condition.
SCANNING CHANNELS
The M-PA may be programmed for
non-priority scan, dual-priority scan, or
scan operation may be disabled. Scan
programming options include a keypad
entered scan list or a fixed scan list. Pri-
20