AMWUT016
ALIGNMENT PROCEDURE FOR GMR1048‑2CK(UT016ZH)
TRANSMITTER
STEP MODE CHANNEL FREQUENCY CONDITION ADJUST METHOD
1 TX 1 462.5625MHz CONNECT RF WATTMETER TO THE RT201 KEY THE TRANSMITTER WITH PTT, AND
ANTENNA PATTERN ON THE PCB. ADJUST THE OUTPUT POWER AT 1.2W±0.05W
2 TX 1 462.5625MHz CONNECT FREQUENCY COUNTER TO RT401 KEY THE TRANSMITTER WITHOUT ANY
THE ANTENNA PATTERN ON THE PCB MODULATION. ADJUST TRANSMISSION
WITH AN APPROPRIATE ATTENUATOR. FREQUENCY TO 462.562500MHz±100Hz
3 TX 1 462.5625MHz CONNECT MODULATION ANALYZER TO RT402 KEY THE TRANSMITTER, AND ADJUST RT402
THE ANTENNA PATTERN ON THE PCB. AS THE WAVEFORM ON THE OSCILLOSCOPE
HPF:OFF LPF:3KHz DE‑EMP:OFF COMES TO BE A CERTAIN SQUARE WAVE
CONNECT OSCILLOSCOPE TO
MODULATION OUTPUT OF THE
MODULATION ANALYZER.
CONNECT AUDIO GENERATOR TO TP3
WAVEFORM:20Hz SQUARE WAVE
MAGNITUDE:1.5Vp‑p
4 TX 1 462.5625MHz CONNECT MODULATION ANALYZER TO RT403 KEY THE TRANSMITTER, AND ADJUST RT201
+CTCSS THE ANTENNA PATTERN ON THE PCB. AS THE MODULATION ANALYZER INDICATES
No.27 HPF:OFF LPF:15KHz DE‑EMP:OFF ±2.2KHz ±0.1KHz DEVIATION.
INJECT 1KHz 60mVp‑p SINE WAVE TO
MICROPHONE JACK FROM AUDIO
GENERATOR.
RECEIVER
STEP MODE CHANNEL FREQUENCY CONDITION ADJUST METHOD
1 RX 1 462.5625MHz CONNECT DC VOLTMETER TO TP2 L403 ADJUST L403 AS THE VOLTMETER
INDICATES 1.3V±0.05V
INJECT ‑47dBm RF SIGNAL WITHOUT
MODULATION FROM SSG TO THE ANTENNA
PATTERN ON THE PCB.
2 RX 1 462.5625MHz CONNECT SINAD METER TO SPEAKER JACK RT404 TURN RT401 FULLY C.C.W., THEN
WITH 16Ω DUMMY LOAD. TURN SLOWLY TO C.W. AND SET IT
AT THE POINT WHERE WAVEFORM
INJECT RF SIGNAL FROM SSG AS FOLLOWING APPEARS AT THE SPEAKER OUT.
CONDITION.
MAGNITUDE:AS LARGE AS THE RECEIVER OBTAINS
10dB SINAD SENSITIVITY.
DEVIATION:±1.5KHz
AF FREQUENCY:1KHz
