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ADJUSTMENT PROCEDURES
TRANSMITTER SECTION
Item Condition
Measurement
Adjustment Specifications/
Test
Equipment
Terminal
Parts
Method
Remarks
1. Transmit
1) CH: TX Lo
RF Power Meter
ANT
SOFTWARE Adjust it to 4W
Power
PTT: ON
Ammeter
PROGRAM
Check
2. Transmit
1) CH: TX Center
Frequency
ANT
SOFTWARE Adjust to ±500Hz
Frequency
PTT: ON
Counter
PROGRAM
or
less
3. Modulation
1) CH: TX Center
Modulation
ANT
SOFTWARE Adjust to ±2.5kHz
Analyzer
PROGRAM
Oscilloscope
MIC
Audio
Signal
Generator
4.CDCSS
Balance
Adjust
CH: TX Center
PTT: ON
Modulation
Analyzer
Oscilloscope
ANT
SOFTWARE
PROGARM
Make the
Demodulation wave
into square waves
RECEIVER SECTION
Item Condition
Measurement
Adjustment Specifications/
Test
Equipment
Terminal
Parts
Method
Remarks
1) CH: RX Center
Oscilloscope
ANT
SOFTWARE Adjust to just turn
1. Squelch MONI: ON
Distortion meter
SPK
PROGRAM on the squelch
1) CH: RX Lo
Oscilloscope
ANT
SOFTWARE Adjust to the min.
2. Sensitivity CH: RX Center Distortion
meter
SPK PROGRAM Distortion and best
SINAD 12dB
CH: RX Hi
Signal to noise ratio
Содержание AJ447
Страница 1: ...S SE ER RV VI IC CE E M MA AN NU UA AL L AJETRAYS MODELAJ447...
Страница 3: ...MAIN PC BOARD TOP VIEW PAGE 2 TOTAL 16 PAGES...
Страница 4: ...MAIN PC BOARD CIRCUIT TOP VIEW PAGE 3 TOTAL16 PAGES...
Страница 5: ...PAGE 4 TOTAL 16 PAGES MAIN PC BOARD BOTTOM VIEW...
Страница 6: ...AGE 5 TOTAL16 PAGES MAIN PC BOARD CIRCUIT BOTTOM VIEW...