AMWUT024
ALIGNMENT PROCEDURE FOR GMR1035‑2(ST DI) / UT024ZH
TRANSMITTER
STEP
MODE
CHANNEL
FREQUENCY
CONDITION
ADJUST
METHOD
1
TX
1
462.5625MHz RF POWER METER TO ANTENNA
‑
CHECK THE RF OUTPUT POWER
PATTERN (HOT AND GND) OF
"LESS THAN 0.7W ".
THE PCB .
2
TX
1
462.5625MHz CONNECT FREQUENCY COUNTER TO
RT102 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
RT101 KEY THE TRANSMITTER, AND ADJUST RT101
THE ANTENNA PATTERN ON THE PCB.
AS THE MODULATION ANALYZER INDICATES
HPF:OFF LPF:15KHz DE‑EMP:OFF
±2.2KHz ±0.1KHz DEVIATION.
INJECT 1KHz 60mVp‑p SINE WAVE TO
MIC LAND FROM AUDIO GENERATOR.
RECEIVER
STEP
MODE
CHANNEL
FREQUENCY
CONDITION
ADJUST
METHOD
1
RX
1
462.5625MHz CONNECT DC VOLTMETER TO TP2
L109
ADJUST L109 AS THE VOLTMETER
INDICATES 1.6V±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 SPRED&SPBLK LAND
RT103 TURN RT103 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
