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ADJUSTMENT PROCEDURE
Step Adjustment
Test Point Procedure
1 L18
Receive
*1
TP1
1. Connect digital voltmeter to TP1 on RF PCB.
2. Set CH01 .
3. Adjust L18.
4. TP1 voltage 1.2~1.6V DC.
2 L20
Transmit
*1
TP1
1. Connect a digital voltmeter to TP1 on RF PCB.
2. Set CH01 .
3. Adjust L20.
4. TP1 voltage 1.2~1.6V DC.
3 VC1
*2
1. Connect the antenna coupler output to a frequency counter.
2. Set channel to CH01 (156.050 MHz).
3. Adjust VC1 to obtain a frequency reading 156.050
MHz
±
200Hz.
4
VR2
*2
Modulation
1. Connect the antenna coupler output to an FM linear detector.
2. Connect Audio Oscillator to Microphone Jack.
3. Set unit to transmit mode.
4. Set audio oscillator output to -23dBm 1 kHz.
5. Adjust VR2 to obtain
±
4.5 kHz deviation.
Remark:
*1: Please reference the “Main PCB Bottom View” drawing in page 12.
*2: Please reference the “Main PCB Top View” drawing in page 11.
9
Summary of Contents for MARINE MR HH330 FLT EU
Page 10: ...WIRING DIAGRAM 10 ...
Page 11: ...PRINTED CIRCUIT BOARD Main PCB Top View VR2 VC1 11 ...
Page 12: ...PRINTED CIRCUIT BOARD Main PCB Bottom View L18 L20 12 ...
Page 13: ...PRINTED CIRCUIT BOARD Cradle Charger PCB View Top View Bottom View 13 ...
Page 15: ...EXPLODED VIEW for HH330 Main Part 15 ...
Page 16: ...EXPLODED VIEW for Battery and Antenna 16 ...
Page 51: ...U4 U5 324 NJM V 51 ...
Page 57: ...U401 HT1621 DICE 57 ...