GE LBI-31564A User Manual
Mobile Communications
DELTA - SX
136 - 174 MHz
RADIO COMBINATIONS
(NEGATIVE GROUND ONLY)
LBI-31564A
Maintenance Manual
LBI-31564
TABLE OF CONTENTS
MILITARY AND SYSTEM SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
COMBINATION NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
STRUCTURE D OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
INITIAL ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
ILLUSTRATIONS:
Figure 1 - Typical Module Lay out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SYSTEM SPECIFICATIONS*
FREQUENCY RANGE 136-174 MHz
FREQUENCY CAPACITY 1, 8, 16 or 32 channels
CHANNEL GUARD 33 EIA Tones, 83 Digita1 Codes
FREQUENCY STABILITY ±0.0005% or optional ±0.0002%
TEMPERATURE RANGE -30C (-22F) to +60C (140E)
DUTY CYCL E 100% Receive , 20% Transmit (EIA)
BATTERY VOLTAGE
Transmit 13.4 VDC +20%
Receive 13.8 VDC +20%
BATTERY DRAIN (Maximum)
Receive
Squelched 0.7 Amperes
Unsquelched 2.2 Amperes
Transm it
40 W a tts 12.0 Amp eres at 13.6 Volts
60 W a tts 17.0 Amp eres at 13.6 Volts
110 Watts 27.0 Amp eres at 13.4 Volts
WARNING
Although the highest DC voltage in Mobile Two-Way Radio equipment is supplied by the vehicle battery, high
currents may be drawn under short circuit conditions. These currents can possibly heat objects such as tools,
rings, watchbands, etc., enou gh to cause burns. Be care ful when worki ng nea r ene r gize d circ uits!
High-level RF energy in the transmitter Power Amplifier assembly can cause RF burns upon contact. Keep away
from these circuits when the transmitter is energized!
Copyright© February 1986, General Electric Company
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SYSTEM SPECIFICATIONS* - Cont.
DIMENSION, LESS ACCE SSORIE S ( H X W X D)
40-60 Watts 65 mm X 260 mm X 325 mm
(2.5 X 10.2 X 12. 7 in ch e s)
110 Watts 65 mm X 290 mm X 325 mm
(2.5 X 11.4 X 12.7 inches)
WEIGHT, LESS ACCESSORIES
40 and 6O Watts 5.9 kg (13.0 pounds)
110 Watts 6.5 kg (14.5 pounds)
LBI-31564
TRANSMITTER
CONDUCTED SPURIOUS - 85 dB
MODULATION ± 5.0 KHz
AUDIO SENSITIVITY 60 to 120 Millivolts
AUDIO FREQUENCY Within +1 dB to -4.5 dB of a 6
CHARACTERISTICS dB/octave pre-emphasis from
300 to 3000 Hz per EIA standards.
Post limiter filter per FCC and EIA
DISTORTION Less than 2% (1000 Hz)
Less than 5% (300 to 3000 Hz)
DEVIATION SYMMETRY 0.5 kHz maximum
MAXIMUM FREQUENCY
SEPARATION
136-153 MHz 17 MHz
150.8-174 MHz 23.2 MHz
MICROPHONE LOAD IMPEDANCE600 ohms
POWER ADJUST RANGE 2:1 of rated power
RF OUTPUT IMPEDANCE 50 ohms
FM NOISE - 65 dB
CARRIER ATT ACK TIME 25 milliseconds
RECEIVER
AUDIO OUTPUT 12 Watts with less than
(to 4.0 ohm speaker) 3% distortion
SENSITIVITY
12 dB SINAD (EIA) Method 0.35 uV 0.175 uV
20 dB Quieting Method 0.50 uV 0.25 uV
Squelch <6 dB SINAD 0.25 uV 0.125 uV
Channel Guard 8 dB SINAD
ADJACENT CHANNEL SELECTIVITY
EIA Two-Signal Method
( @ 25 kHz channels) - 85 dB - 85 dB
( @ 30 kHz channels) - 95 dB - 95 dB
SPURIOUS RESPONSE - 90 dB - 90 dB
INTERMODULATION @ 25/30 kHz - 85 dB - 80 dB
MODULA TION ACCEPT ANCE ± 7.0 kHz
MAXIMUM FREQUENCY
SEPARATION
136 - 153 MHz 17 MHz
150.8 - 1 74 MHz 23.2 MHz
FREQUENCY RESPONSE Within +2 and -8 dB of a standard
Standard UHS Preamp
6 dB per octave de-emphasis curve
from 300 to 3000 Hz (1000 Hz
reference)
AUDIO ATTACK TIME 25 milliseconds
CHANNEL GUARD TX TONE <5%
DISTORTION
RF INPUT IMPEDANCE 50 ohms
HUM/NOISE RATIO
UNSQUELCHED - 55 dB
SQUELCHED - 70 dB
RECEIVER RECOVERY TIME 200 milliseconds
RECEIVER A TTACK TIME 150 milliseconds
CHANNEL SPACING 25/30 kHz
CHANNEL GUARD (Optional)
Tone 67 - 210.7 Hz ( ± 0.5%) **
Digital 023 - 526 (H) code (Standard Codes)
* These specifi cat ion s are intende d pri m ar ily for use of the se rvi cem a n. Refer to t he approp ria te Spe cif ic a tions She et for the
comple t e sp e c ifi c at ions.
** Any tone ( 67-2 10 Hz) ±0.5%
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