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
