GE LBI-31564A User's Manual
Contents
1. 8 or 16 channels a MODE A B switch optional to expand the channel select capability to 32 seven segment channel indi cators s a red transmit indicator channel busy indicator optional and an external tone option jack Options that may be used with this control unit include Type 90 and 99 tone squelch operated relay SOR GE STAR encoder and public address The S 600 control unit contains an on off volume con trol switch squelch disable switch red transmit indicator and a 7 segment channel indicator A rotary channel select switch permits selection of up to eight channels A white power on indicator is used for back lighting the front panel Space is provided for two optional pushbutton switches and two optional indicators The S 900 series control units designed specific ally for the DELTA class radios are highly versatile software con trolled units providing numerous functions and options in cluding Dual priority Scan Digital Volume Control Digital Squelch Control Type 90 or 99 Encode Tones e GE STAR Identification LBI 31564 e 128 Channels in 8 Modes of 16 Channels each or 4 Modes of 32 Channels each e Carrier Control Timer per mode basis e Channel Guard Tone or Digital Channel Frequencies e Home Channel Revert e Auxiliary Relay Control CHANNEL SELECTION Depending on the control unit used a single rotary or pushbutton selector switch will select up to 16 channels In radi2. 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 y aoaaa o EEA ee est 4 STRUCTURED OPTIONS nope oy Sts Ae bes EE S SUR GRUB ge ae 6 DESCRIPTION far rye en Poe RMS su sedute eme Sc cS 5 INITIAL ADJUSTMENT 542 e eR Rea dore ew ad eo eg es 7 OPERATION 5 2 62 vehe oS eRe Ee Vue P RUNE PE Es SES Euh e eor ges 7 8 MAINTENANCE 23 2 32 03 bay oe ed Das qe aA Sere we Exe emu cde RSS 8 ILLUSTRATIONS Figure 1 Typical Module Layout 5 SYSTEM SPECIFICATIONS FREQUENCY RANGE 136 174 MHz FREQUENCY CAPACITY 1 8 16 or 32 channels CHANNEL GUARD 33 EIA Tones 83 Digital Codes FREQUENCY STABILITY 0 0005 or optional 0 0002 TEMPERATURE RANGE 30C 22F to 60C 140E DUTY CYCLE 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 Transmit 40 Watts 12 0 Amperes at 13 6 Volts 60 Watts 17 0 Amperes at 13 6 Volts 110 Watts 27 0 Amperes 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
3. S Preamp 12 dB SINAD EIA Method 0 35 uV 0 175 uV 20 dB Quieting Method 0 50uV 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 amp 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 MODULATION ACCEPTANCE 7 0 kHz MAXIMUM FREQUENCY SEPARATION 136 153 MHz 17 MHz 150 8 174 MHz 23 2 MHz FREQUENCY RESPONSE RF INPUT IMPEDANCE HUM NOISE RATIO UNSQUELCHED SQUELCHED RECEIVER RECOVERY TIME RECEIVER ATTACK TIME CHANNEL SPACING CHANNEL GUARD Optional Tone Digital Within 2 and 8 dB of a standard 6 dB per octave de emphasis curve from 300 to 3000 Hz 1000 Hz reference 50 ohms 55 dB 70 dB 200 milliseconds 150 milliseconds 25 30 kHz 67 210 7 Hz 0 596 023 526 H code Standard Codes These specifications are intended primarily for use of the serviceman Refer to the appropriate Specifications Sheet for the complete specifications Any tone 67 210 Hz 40 5 LBI 31564 FCC FILING NUMBER RECEIVER TRANSMITTER POWER OUTPUT FREQUENCY ER 151 A KT 242 A B 40 WATTS 136 174 MHz KT 244 A B 110 WATTS 136 174 MHz A Oscillator Stability of 5 PPM B Oscillator Stability of 2 PPM COMBINATION NOMENCLATURE Digits Digit Digit Digit Digit Digits Digit Digit 1 amp 2 4 5 6 7 9 10 11 Transmit
4. ed down and the radio pulled out of the mounting plate or the top cover removed for servicing When pulled down the han dle can be used to carry the radio PA BOARD LOW PASS FILTER ANTENNA JACK Sem 1 i UHS PRE AMP RX FRONT END MICROCOMPUTER AUDIO SYSTEM CONTROL SYNTHESIZER The PA board is inserted into the radio from the top of the frame while the TRS board is inserted from the bottom There are no wires used in the basic radio Interconnections are provided by pins on the TRS board that mate with con nectors on the PA assembly A power bus connects A and A from the front connector to the PA assembly The PA board is isolated from ground floating power is supplied directly from the battery to the PA power output stage The radio is of single layer con struction with all major modules and tuning adjustments easily accessible from the top of the radio Centralized metering jacks for the transmitter receiver and system functions are provided for simplified alignment and troubleshooting Excluding option boards the basic radio consists of two printed wiring boards mounted in a cast aluminum frame The two boards are the transmitter receiver system TRS board 19D901650G1 and the power amplifier board See Figure 1 The TRS board is connected to chassis ground al lowing it to be used in vehicles with a negative ground bat tery system only Option boards include the Channel Guard board and VG Inter
5. face board The VG Interface board is used in radios equipped with VOICE GUARD PA ASSEMBLY Jj EXCITER Figure 1 Typical Module Layout LBI 31564 FREQUENCY SYNTHESIZER 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 mi crocomputer generates all transmit and receive RF frequen cies EFEPROM The EEPROM stores binary data for all RF frequencies Channel Guard tones digital codes and the timing function of the carrier control timer CCT The microcomputer ac cesses the EEPROMS and provides the correct WALSH bits to the Channel Guard board to generate the correct Channel Guard tone or digital code on a per channel basis PROGRAMMING The EEPROM allows the radio to be reprogrammed as needed to adapt to changing system requirements RF fre quencies Channel Guard tones and digital codes and the CCT function can be reprogrammed Depending on the configuration of the radio one or two EEPROMS may be provided Radios not equipped with a MODE A B switch will have one EEPROM Radios with more than 16 channels and those with the MODE switch will have two EEPROMS NOTE When programming remember that all RF frequen cies must be divisable by 5 or 6 25 kHz but not both The EEPROMS can be reprogrammed through the radio front con
6. i Product Frequency Sus adt Channel Type RF Power haac Oscillator Code Range Range pacing Output Capacity Stability DELTA SX 136 153 30 kHz Wide Band 40 Watts 2 PPM 16 Channel b 3 ii mh ab 5 ua it T D 150 174 150 174 110 A B Mode MHz MHz 32 Channel STRUCTURED OPTIONS Digit Digit Digit Digit Digit Digit M N Program ming Channel Guard R v Receiver Voice Type Guard ld E o 4 a DE Std Frame Program amp Mtg Hdwe Custom Tone UHS Voice Program Digital Pre Ampl Guard pA 5 Download LBI 31564 DESCRIPTION General Electric DELTA SX mobile radio combinations are completely solid state utilizing microcomputer technol ogy and integrated circuits to provide high quality high re liability radios The DELTA SX radio is designed for use in vehicles having a negative ground battery system In vehi cles having a positive ground battery system a polarity con verter must be used Standard combinations may be equipped with Microcomputer Control led Frequency Synthesizer Up to 32 channels e 0002 or 0005 frequency stability e UHS Preamplifier Ultra High Sensitivity optional Tone and or Digital Channel Guard optional The radio set is housed in a weather resistant case only 2 1 2 inches high The radio is secured to the vehicle by a bot tom mounting plate and is tamperproof when locked into the plate When unlocked the handle can be pull
7. itch is supplied with the radio The hookswitches are equipped with a Channel Guard disable switch Placing the switch in the up position towards the small speaker symbol disables the Channel Guard decoder With the switch in the down position the Channel Guard is disabled when the microphone or handset is removed from the hookswitch SPEAKER A three by five inch speaker contained in a molded plas tic housing provides an audio output of 12 watts with a speaker impedance of four ohms The speaker leads are ter minated in Vehicle Systems Plug P3 which connects to JI A on the rear of the control unit INITIAL ADJUSTMENT After the radio has been installed as described in the In stallation Manual the following adjustments should be made by a certified electronics technician TRANSMITTER ADJUSTMENT The transmitter adjustments include measuring the for ward and reflected power and optimizing the antenna length then setting the transmitter to rated power output Next measuring the frequency and modulation and record ing these measurements for future reference For the com plete transmitter adjustment refer to the Alignment Procedure in the service section of this manual RECEIVER ADJUSTMENT The initial adjustment for the receiver includes tuning the input circuit to match the antenna Refer to the Front End Alignment Procedures in the service section of this manual OPERATION Complete operating instructions for
8. nector using the General Electric Universal PROM Programmer Model TQ23IO This programmer allows all information to be loaded simultaneously Alternatively a single channel Programmer Model 4EX22A10 allows the user to reprogram the radio on a per channel basis This programmer requires the removal of the radio top cover and any option boards present A special programming jack J711 is provided in the radio for inter connections Programming instructions are provided in the respective Programmer Maintenance Manuals TRANSMITTER The transmitter consists of the exciter frequency synthe sizer TX VCO and a power amplifier assembly The PA as sembly consists of a PA board mounted along the side of the radio next to the heat sink assembly The PA board also con tains a hermetically sealed antenna relay and a low pass fil ter RECEIVER The receiver consists of the frequency synthesizer RX VCO injection amplifiers front end IF and limiter detector In UHS receivers a preamplifier board is added in the re ceiver front end Audio and squelch circuitry for the re ceiver is located in the system section of the TRS board Jacks for the Channel Guard and other structured options are also located in the system area CONTROL UNITS Several S series control units are available for use with the DELTA SX radio combinations The S 500 control unit contains an on off volume con trol switch a rotary channel selector switch for 1
9. objects such as tools rings watchbands etc enough to cause burns Be careful when working near energized circuits 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 2 LBI 31564 SYSTEM SPECIFICATIONS Cont DIMENSION LESS ACCESSORIES H X WX D 40 60 Watts 110 Watts WEIGHT LESS ACCESSORIES 40 and 6O Watts 110 Watts 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 a6 CHARACTERISTICS dB octave pre emphasis from 300 to 3000 Hz per EIA standards Post limiter filter per FCC and EIA DISTORTION Less than 296 1000 Hz Less than 596 300 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 IMPEDANCE 600 ohms POWER ADJUST RANGE RF OUTPUT IMPEDANCE FM NOISE CARRIER ATTACK TIME AUDIO ATTACK TIMB CHANNEL GUARD TX TONE DISTORTION 2 1 of rated power 50 ohms 65 dB 25 milliseconds 25 milliseconds 596 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 RECEIVER AUDIO OUTPUT 12 Watts with less than to 4 0 ohm speaker 3 distortion SENSITIVITY Standard UH
10. os equipped with more than 16 channels the control unit contains a MODE A B switch The MODE switch al lows the user to select a second set of 16 channels 17 32 The MODE A B switch may be used to provide mobile to mobile communications through an intermediate repeater repeated path or direct mobile to mobile communications For example channel 1 Mode A may be programmed for the repeater frequency repeated path while channel 1 Mode B would be programmed for the mobile receive frequency direct path Judicious programming will allow selection of repeated or direct communications paths on selected chan nels MICROPHONE AND HANDSET A hand held microphone with a built in transistorized microphone preamplifier is available for use with the radio The microphone is housed in a sturdy twopiece case and the extendable coiled cord plugs into the microphone jack at the k of the control unit The plug is secured to the jack by a retaining screw An optional telephone type hand set is available for use with the radio The handset uses a dynamic microphone with a built in microphone preamplifier The extendable coiled cord plugs into the microphone jack on the back of the control unit and is secured to the jack by a retaining Screw These functions are actually performed in the radio If you down load the data is stored in the control unit HOOKSWITCHES In Channel Guard or other tone applications a micro phone or handset hooksw
11. the Two Way Radio are provided in the Operator s Manual The basic proce dures for receiving and transmitting messages in mobile combinations are as follows 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 5 In multi frequency radios select the desired channel The radio is now operational TO TRANSMIT A MESSAGE 1 Turn the radio on and select the proper channel 2 If a lengthy message or several messages are to be sent the vehicle engine should be running to maintain the battery charge 3 Pick up the microphone and listen briefly to the speaker to make sure that no one else is using the channel 4 Press the push to Talk PTT switch on the microphone and send the message The red transmit light on the con trol unit will glow each time the PTT switch is pressed MAINTENANCE The use of microcomputer technology allows self diag nostic maintenance routines to be incorporated in the micro computer software These routines are easy to run and provide a quick analysis of microcomputer and frequency synthesizer operation The service section of this manual contains the diagnos tic rou
12. tines and other maintenance information to service this radio The service section includes e System interconnections Mechanical layout e Disassembly procedures Replacement of IC s chip capacitors and resistors Microcomputer self diagnostics Alignment procedures for the transmitter and receiver Troubleshooting flowcharts and waveforms ERICSSON Z Ericsson GE Mobile Communications Inc Mountain View Road Lynchburg Virginia 24502 Pinted in U S A
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