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ALIGNMENT PROCDDURES 

 

This transceiver is completely aligned at the factory and does not require any adjustments for installation. 
However it is considered as good practice to verify that none of the adjustments are changed.   
 
Do not adjust any circuitry in this radiotelephone unless you understand the circuit operation and have 
experience in adjusting radiotelephone.  Tampering with the radiotelephone may upset the alignment and 
lower its performance. 
 

Test Equipment Required: 

 

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Regulated DC power supply, 10 -16V adjustable, 7A   

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Audio signal generator, 10Hz~3kHz 

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Digital multimeter 

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Deviation meter {linear detector} 

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Frequency counter, 0~500MHz high impedance 

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Oscilloscope 

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RF power meter, 

30W 

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High frequency standard generator, >500MHz 

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Tracking generator, >500MHz 

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Distortion analyzer 

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Audio level meter 

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T-coupler 

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Sinad meter 

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Alignment drivers, etc. 

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Or a radio communication test set 2955 (MARCONI INSTRUMENTS) 

 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Summary of Contents for Ray54

Page 1: ...Varicap VD302 The modulated signal output from the VCO is pre amplified by Q2 and IC1 When the supply voltage is 13 6V this signal will be amplified up to 1W or 25W The signal is filtered by low pass...

Page 2: ...volume control VR201 through de emphasis circuit feeding IC10A IC10B and finally amplified by Audio amplifier IC11 and heard in the speaker The squelch control signal also produced by IC7 the rectifie...

Page 3: ...xer D501 D502 D503 D504 The first IF Immediate Frequency 17 9 MHz is produced This IF signal is passed through a transformer coil L510 and a pair of crystal filter F1 F2 to further filter The first IF...

Page 4: ...ilter and IC6D low pass filter form FSK signal This FSK is signal decoded by IC609 The DSC is restored by IC203 MCU with RX data from pin1 Of IC609 GPS Message External GPS Message is input to MCU thr...

Page 5: ...in adjusting radiotelephone Tampering with the radiotelephone may upset the alignment and lower its performance Test Equipment Required Regulated DC power supply 10 16V adjustable 7A Audio signal gene...

Page 6: ...y which should be 2 5 10 mV 6 RX Sensitivity L10 L11 L12 L13 L14 L19 T1 T2 T3 1 Check RX sensitivity if it is normal 2 Adjust L10 L11 L12 and L13 to obtain Best Frequency response 3 Adjust T1 T2 to ob...

Page 7: ...ck 21 4MHz output of first mixer Q10 Check 21 4MHz output of crystal filters F1 F2 Check 21 4MHz output of first IF amplifier Q11 Check 450kHz signal from ceramic filter F3 Check to see if VCO circuit...

Page 8: ...Page 8 of 8 DISASSEMBLY INSTRUCTIONS To disassembly follow the procedures below A Unscrew the 4Screws of hand MIC B Unscrew 6 screws for the bottom cabinet of the main UNIT A B...

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