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Receiver
Test Equipment Required and Connections
• SG: RF Signal Generator, 46.770MHz
• Noise Meter
• Digital Voltmeter
SG
MOD=1kHz
DEV=±3kHz
DC Power Supply
2.4V
Preset
Turn Power On (Connect Battery) while depressing " æ " and " # " keys. A beep will be heard.
Alignment Procedure
Step
Preset to
SG: 1mV
1
No modulation
SG: 1mV
2
No modulation
SG: 1mV
3
1kHz ±3kHz
deviation
SG: 0.09"V
4
1kHz ±3kHz
deviation
Alignment Point Location Main PCB
• Dummy Load, 150-ohm
• DC Power Supply: 2.4 V
• SINAD Meter
PORTABLE
SP
RF Test
Terminal
Point
Batt Terminal
Digital Voltmeter
Adjustment
Press the " 1 " key, then the TX Mode is entered.
L503
Set the digital voltmeter at the test point of RX VCO (See page 25),
then adjust L503 to indicate DC 2.0 V ±0.05V.
Press the " 4 " key, then the RX Adjust Mode is entered.
L502
Connect SG to RF Test Point. Set the digital voltmeter to the DISCRI
Test Point. Adjust L502 to indicate DC 0.9V ±0.05V.
Connect the NOISE METER to the SP Terminal through a 150-ohm
RT502
dummy load, then adjust RT502 to indicate 140 ±5 mV.
Press the "MEMO" key, then the SQ Adjust Mode is entered.
Connect SG to RF Test Point. Turn RT501 to fully clockwise and
RT501
confirm the Ringer SP501 does not ring.
Adjust RT501 to turn to counter clockwise slowly where the ringer
SP501 rings.
NOISE METER
Dummy Load
(150-ohm)
Balance Input
SINAD
Meter
Remarks
DISCRI Test Point
RT502
L502
RT501
6
RF Test Point
RX VCO Test Point
L503
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