LBI-31564A Mobile Communications DELTA - SX 136 - 174 MHz RADIO COMBINATIONS (NEGATIVE GROUND ONLY) Maintenance Manual
LBI-31564 TABLE OF CONTENTS MILITARY AND SYSTEM SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 COMBINATION NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 STRUCTURED OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 INITIAL ADJUSTMENT . . . . . . . . . . . . . . . . .
LBI-31564 SYSTEM SPECIFICATIONS* - Cont. DIMENSION, LESS ACCESSORIES (H X W X D) 40-60 Watts 110 Watts WEIGHT, LESS ACCESSORIES 40 and 6O Watts 110 Watts 65 mm X 260 mm X 325 mm (2.5 X 10.2 X 12.7 inches) 65 mm X 290 mm X 325 mm (2.5 X 11.4 X 12.7 inches) 5.9 kg (13.0 pounds) 6.5 kg (14.5 pounds) TRANSMITTER CONDUCTED SPURIOUS - 85 dB MODULATION ± 5.0 KHz AUDIO SENSITIVITY 60 to 120 Millivolts AUDIO FREQUENCY CHARACTERISTICS Within +1 dB to -4.
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LBI-31564 DESCRIPTION General Electric DELTA-SX mobile radio combinations are completely solid state utilizing microcomputer technology and integrated circuits to provide high quality - high reliability radios. The DELTA-SX radio is designed for use in vehicles having a negative ground battery system. In vehicles having a positive ground battery system a polarity converter must be used. Standard combinations may be equipped with: • Microcomputer Control led Frequency Synthesizer • Up to 32 channels • .
LBI-31564 FREQUENCY SYNTHESIZER TRANSMITTER The frequency synthesizer consists of a microcomputer, electrically erasable PROM(S) (EEPROM), a frequency synthesizer IC, transmit and receive VCO’s, and associated circuitry. The frequency synthesizer under control of the microcomputer generates all transmit and receive RF frequencies. The transmitter consists of the exciter, frequency synthesizer, TX VCO, and a power amplifier assembly.
LBI-31564 • 128 Channels in 8 Modes of 16 Channels each or 4 Modes of 32 Channels each • Carrier Control Timer (per mode basis)* • Channel Guard - Tone or Digital* • Channel Frequencies* • Home Channel Revert • Auxiliary Relay Control HOOKSWITCHES In Channel Guard or other tone applications, a microphone or handset hookswitch is supplied with the radio. The hookswitches are equipped with a Channel Guard disable switch.
LBI-31564 TO RECEIVE A MESSAGE 1. Turn the radio on by turning the OFF-VOLUME control halfway to the right. 2. Turn the SQUELCH control clock-wise (to the right) as far as possible. A noise will be heard from the speaker. 3. Adjust the VOLUME control for the desired listening level. 4. Turn the SQUELCH control counterclockwise to the left until the noise just cuts off. 4. Press the push-to-Talk (PTT) switch on the microphone and send the message.
