GE LBI-38378C User Manual
Mobile Communications
LBI-38378C
M-PA
VHF
PORTABLE FM RADIO
TABLE OF CONTENTS
REAR COVER ASSEMBLY . . . . . . . . . . . . LBI-38597
FRONT CO VE R ASSEMBLY (EARLIER)
AND CONTROL BOARD . . . . . . . . . . . . . LBI-38384
FRONT CO VE R ASSEMBLY (LATER)
LESS CONTROL BOARD . . . . . . . . . . . . . LBI-38834
CONTROL BOARD (LATER) . . . . . . . . . . . LBI-38828
VHF SERVICE SECTION . . . . . . . . . . . . . LBI-38385
Maintenance Manual
LBI-38378
TABLE OF CONTENTS
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
OPTIONS AND ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
REAR COVER ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
FRONT COVER ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
ANTENNAS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
BATTERY PACKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
UNIVERSAL DEVICE CONNECTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
PROGRAMMING
FEATURES PROGRAMMABLE ON A PER CHANNEL BASIS . . . . . . . . . . . . . . . . . . . . . . 9
FEATURES PROGRAMMABLE ON A PER MODE BASIS . . . . . . . . . . . . . . . . . . . . . . . . 9
FEATURES PROGRAMMABLE ON AN OVERALL RADIO BASIS . . . . . . . . . . . . . . . . . . . 9
OPERATOR MANUAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Page
OPERATING TIPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
INTRINSICALLY SAFE USAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
BATTERY PACKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
PREVENTIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
DISASSEMBLY/ REASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
ILLUSTRATIONS
Figure 1 - System Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 2 - Scan Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 3 - Select Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 4 - Side View (All Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 5 - UDC Pin-Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figures 7, 8 - Disassembly/Reassembly Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figures 9, 10 - Disassembly/Reassembly Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 11 - Rear Cover Assembly Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 12 - Front Cover Assembly (Earlier) And Control Board Block Diagram . . . . . . . . . . . . . . . 17
Table 1 -VHF Antennas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 2 - UDC Pin Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 3 - Torque Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
NOTE
The software contained in this device is copyrighted by Ericsson GE Mobile Communications Inc. Unpublished rights
are reserved under the copyright laws of the United States.
This manual is published by
changes to this manual necessitated by typographical errors, inaccuracies of current information, or improvements to programs and/or equipment, may be made by
Such changes will be incorporated into new editions of this manual. No part of this manual may be repro du ce d or transmit ted in any form or by any means, electronic or mechanical, inclu ding p hot ocop yi ng an d re cor ding, for any purpo se, with out
the express written permission of
Copyright© November,1989, General Electric Company
2
Ericsson GE Mobile Communications Inc.
Ericsson GE Mob ile Communications Inc.
Ericsson GE Mobile Communications Inc.
, without any warranty. Improvements and
, at any time and without notice.
SPECIFICATIONS*
GENERAL
Frequency Bands 136 - 150.8 MHz
(FCC Type Acceptance Number) 146 - 162 MHz (AXATR-182-B5)
157 - 174 MHz (AXATR-182-C5)
DOC Number TR-182-D2
Frequency Stability 5.0 ppm
Channel Capacity
Select Model 16
Scan Model 192
System Model 192
Maximum Frequency Separation full bandsplit
Channel Spacing 30 kHz
Operating Temperature Range -30°C to +60°C
Maximum Relative Humidity 90% at 55°C
LBI-38378
Battery Voltage 7.5 Vdc (nominal)
Dimensions (H x W x D)
less battery, knobs and antenna 140 x 69 x 38 mm (5.52 x 2.72 x 1.50")
with Extra High Cap. Battery 232 x 69 x 40 mm (9.15 x 2.72 x 1.58")
Weight
less battery and antenna 540 grams (19 ounces)
with Extra High Cap. Battery 907 grams (32 ounces)
TRANSMITTER
Rated RF Power Output 6.0 Watts
High / Low RF Power Output 6.0 Watts / 1 Watt (programmable per channel)
Maximum FM Deviation ±5 kHz
FM Hum and Noise -45dB (companion receiver)
Spurious and Harmonic Emissions -75 dBc
Audio Response +1 to -3dB (6 dB/oct ave pre-emp hasis from 300 Hz to 3 kHz)
Audio Distortion less than 3% (at 1000 Hz tone, 3 kHz deviation)
RECEIVER
Sensitivity (12 dB SINAD) -116 dBm (0.35 µV)
Adjacent Channel Selectivity -80dB
Critical Squelch 10dB SINAD
Intermodulation -78dB
Spurious and Imag e Rejection -80dB
Audio Output 500 mW (24-ohm load impedance)
Audio Response +2 to -8dB (6 dB/octave de-emphasis from 300 Hz to 3 kHz)
Audio Distortion less than 5% (at 500 mW)
* These specifications are intended primarily for the use of the serviceman. See the appropriate Specifications Sheet for
the complete specifications.
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LBI-38378
OPTIONS AND ACCESSO RIES
Radios, Antennas, Batteries
Carrying Accessories
A udio Accessories
Chargers
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LBI-38378
INTRODUCTION
The M-PA radio is a high quality microprocessor con-
trolled synthesized portable FM radio. M-PA operation is
highlighted by the radio ’s programming versatility. This allows tailored operation of the portable radio to meet the
needs of the radio system and the indi vi d ual users. Thre e (3)
different M-PA radio models are available: Select, Scan and
System.
The M-PA Select model radio is the basic version that
can be programmed with up to sixteen (16) channels. This
unit features an 8-digit alphanumeric liquid crystal display
(LCD) and a 16-position knob for channel selection. The
display is backlit for nighttime and low-level ambient light
operation.
Scan and System model radios have an LCD similar to
the Select model radio. A ke yp ad is added to the s e r a d i os (4button on Scan model, 16-button on System model) to provide additional features not available on the Select model
radio. These radios can be programmed with up to 192 different radio channels. Bot h also provide scan capability including dual-priority scan, and DTMF telephone
interconnect of up to ten (10) preprogrammed numbers. The
telephone numbers can be recalled at will and initiated. The
System model’s numeric keypad allows editing of the ten
preprogrammed numbers and manual DTMF telephone inter-connect dialing.
FEATURES
192-Channel Capability
•
radios can be programmed with up to 192 channels
accessed in 12 modes (banks of channels) with 16
channels in each mode or 16 modes with 12 channels
in each mode. The Select model radio can be
programmed with a maximum of 16 channels.
Backlit Liquid Crystal Display
•
alphanumeric LCD provides programmable
customi zat io n and fe ed back to t he op er ato r of variou s
operating conditions. Status flags located above and
below the digits alert the operator to various radio
conditions such as channel busy, transmitter in
operation, or a low battery condition. Scan and
System model radios have additional status flags for
scan operation. LCD backlighting can be enabled or
disabled on a per channel basis.
Rotary Control Knob
•
radios, the 16-position top-mounted Control Knob
allows easy selection of modes (banks of channels),
channels or Channel Guard (CG) according to how
the radio is programmed. On the Select model radio,
the Control Knob selects the operating channel. A
stop-plate may be installed under the knob to limit the
- Scan and System models
- The 8-digit
- On Scan and System model
maximum number of positions to less than sixteen
(16). It is normally factory installed for fifteen (15)
positions.
Volume Control Knob
•
provides quick and easy adjustments to the volume
level. Minimum volume levels can be programmed
into the unit. This feature prevents missed calls due to
a low volume setting.
Monitor Button
•
to disabled squelch and if programmed for the
selected channel, it is used to toggle CG and/or T99
operation on and off.
Keypad
•
keypad on its front panel that provides scan and menu
control. The menus allow selection of the current
operating mode (bank of channels) and/or channel
depending upon the radio’s programming. The menus
also allow control of various other radio features such
as selection of stored telephone interconnect numbers
for auto-dial operation, and alert tone enable/disable
control. A System model radio has a 16-button
keypad. The top four (4) buttons are identical to the
Scan model keypad, providing scan and menu
control. The lower twelve (12) buttons form a
numeric keypad that allows manual DTMF telephone
interconnect dialing and editing of telephone
interconnect numbers stored in the radio. Select
model radios do not have a keypad.
Scan Capability
•
be programmed for non-priority scan or dual-priority
scan operation. Scan programming options include a
keypad entered scan list or a fixed scan list. Priority
scan programming options include a fixed
priority-one channel or the selected channel as the
priority-one channel. The radio can be pro gra mme d t o
scan only t he channels in the current mod e (bank of
channels) or it may be programmed to scan across
modes. The Sele ct model radio do es not support scan
operation.
Telephone Interconnect Capability
•
System model radios can store up to ten (10)
telephone interconnect numbers for auto-dial
operation. These numbers are preprogrammed into
the Scan model radio. In the System model radio, the
numbers can be preprogrammed, operator-entered
and/or edited via the numeric keypad. The System
model’s numeric keypad also allows manual DTMF
tele phone interconnect dialing. The Select model
radio cannot initiate telephone interconnect calls.
- The Scan model radio has a 4-button
- This side-mounted button is used
- Scan and System model radios can
- This rotatable control
- The Scan and
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LBI-38378
• Programmable Multi-Tone Channel Guard
(CTCSS) - Channel Guard tone frequencies within
the range of 67 H z to 210.7 Hz, including all of the
standard EIA frequencies, can be programmed for
encoded/de co ded operation.
• Programmable Multi-Code Digital Channel
Guard - Similar capability as with tone Channel
Guard is provided.
• Two-Tone Sequential (T99) Decode - Selective
calling decode is enabled or disabled on each
individual channel. Two (2) sets of unique de-codes
are programmable to allow large systems individual
and group call capability. Sets are selectable on a
mode (bank of channels) basis.
• Channel Busy Lockout - Personality information
includes transmit disable capability on a channel
where carrier activity is present This feature is
selectable on a per channel basis.
• GE-STAR Compatibility - The radio can be
programmed to transmit GE-STAR at PTT key, at
PTT unkey, or both. 16,384 individual ID codes are
available.
• Emergency Signalling Feature - GE-STAR
emergency signalling can be enabled by the red
Emergency/Home Button on the top of the radio or it
can be enabled by a lanyard connected to the UDC.
• Home Button - The radio can be programmed to
switch to a home mode or channel (depending on
Control Knob’s programming) when the red
Emergency/Home Button on the top of the radio is
pressed.
• Programmable Carrier Control Timer - A
programmable transmit timer will automatically
disable the transmitter and provide an alerting tone
after time-out. This feature prevents radio damage and
unnecessary channel traffic in the event of a "stuck"
mic. The CCT is reset on every PTT.
• Programmable Tr ansmit P ower Le v el - Transmitter
power level is PC programmable into the radio (high
or low) on a per channel basis.
• Squelch Tail Elimination - Squelch and audio
circuits are designed so that annoying squelch pops
which may occur at the end of received messages are
minimized. This feature is compatible with existing
STE systems.
• Alert Tones - Alert tones prompt the operator of
various radio conditions such as key pressed, CCT
time-out or a low battery.
• Power-Up Self-Test - At power-up the radio
automatically performs a diagnostic test on itself and
reports any found errors via the LCD .
• Programmable via the Universal Device Connector
(UDC) - The entire operation of the radio can be field
customized by programming the unit using an IBM
PC or compatible computer. The programmed
personality is stored in nonvolatile m emory within the
radio.
• Simple Remote Control Capability - External
accessories can be connected to the UDC such as a
headset, a speaker-mic or a lanyard. Connection of
the speaker-mic allows the operator to remotely
control PTT operation and audio level of the external
speaker. An antenna jack is located on the UDC for
the connection of a remote mounted antenna such as
when the radio is used in a vehicular ch arger.
• Meets MIL-810C and D Specifications - The sturdy
die-cast aluminum case is designed to seal out
moisture, blowing rain and other harsh environmental
factors.
• Battery Packs - Several different battery pack sizes
and capacities are available.
• Available Options - These options include the
antennas, audio accessories, batteries, carrying
accessories, chargers, lanyards, and the vehicular
chargers.
DESCRIPTION
Two major ass emblies form an M-PA radio. The Front
Cover Assembly contains all of the microprocessor circuitry,
audio circuitry and the operating controls. The Rear Cover
Assembly houses the RF circuitry which includes the transmitter, receiver and the frequency synthesizer. The assemblies are electrically interconnected by two single-in-line
type connectors. When mated together, the assemblies form
a weather resistant diecast aluminum case that protects the
radio’s circuitry from harsh outside environments.
Power is provided by a battery pack that slides and
locks on to the bottom of the radio. The radio’s on/off
switch is located on the battery pack.
The antenna screws on to the top of the unit A side antenna connection is also provided at the UDC for an e xte rna l
antenna or for test purposes. This UDC antenna connection
is also utilized for external antenna operation when the radio
is locked in the vehicular charger.
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