Uniden GMR1048-2CK Alignment Procedure

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