Receiver
Test Equipment Required and Connections
SG: RF Signal Generator, 46.770MHz Dummy Load, 150-ohm
Noise Meter DC Power Supply: 2.4 V
Digital Voltmeter SINAD Meter
PORTABLENOISE METER
SGDummy Load
(150-ohm)
RF TestSP
PointTerminal
Batt Terminal
MOD=1kHz
DEV=?3kHz
DC Power SupplyDigital Voltmeter Balance Input
SINAD
Meter
2.4V
Preset
Turn Power On (Connect Battery) while depressing " a" and " # " keys. A beep will be heard.
Alignment Procedure
StepPreset toAdjustmentRemarks
Press the " 1 " key, then the TX Mode is entered.
SG: 1mV
1L503Set the digital voltmeter at the test point of RX VCO (See page 25),
No modulation
then adjust L503 to indicate DC 2.0 V ?0.05V.
Press the ? 4 ? key, then the RX Adjust Mode is entered.
SG: 1mV
2L502Connect SG to RF Test Point. Set the digital voltmeter to the DISCRI
No modulation
Test Point. Adjust L502 to indicate DC 0.9V ?0.05V.
SG: 1mV
Connect the NOISE METER to the SP Terminal through a 150-ohm
31kHz ?3kHzRT502
dummy load, then adjust RT502 to indicate 140 ?5 mV.
deviation
Press the ?MEMO? key, then the SQ Adjust Mode is entered.
SG: 0.09"VConnect SG to RF Test Point. Turn RT501 to fully clockwise and
41kHz ?3kHzRT501confirm the Ringer SP501 does not ring.
deviationAdjust RT501 to turn to counter clockwise slowly where the ringer
SP501 rings.
Alignment Point Location Main PCB
DISCRI Test PointRF Test PointRX VCO Test Point
RT502
L503
L502
RT501
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