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Handset Unit
Transmitter Section
Connection
Power
Meter
Frequency
Counter
Deviation
Meter
Preset
a) Connect the handset RF unit to the handset main unit.
b) Connect DC power supply to battery connector on the handset unit.
c) Turn the DC power supply ON while pressing " " and "#" keys, and keep pressing the keys continuously for
approximate 2 seconds.
d) Release keys when entering TEST mode 1 with TALK LED lighting and beep.
Alignment Procedure
Step
Adjustment
VR502
1
(TX Power)
CT501
2
(TX Frequency)
VR601
3
(TX Modulation)
Alignment Point Location on Handset Main PCB and Handset RF PCB
Handset Main PCB
MIC + Pin
MC601
RF
HANDSET RF PCB
Test Point
RF
Test Point
RF
Test Point
Connect the RF power Meter to the RF test point on the handset RF PCB.
Adjust VR502 for a −7 dBm reading on the Power Meter.
Connect the Frequency Counter to the RF test point on the handset RF
PCB. Adjust CT 501 to make sure that the frequency is 903.085147 MHz.
Press the "2" key to enter the TEST Mode 2. Connect the AF Generator to
the MIC Connector make sure that the output is 1 kHz 10.5 mV from the AF
Generator.
Connect the Deviation Meter to the RF test point on the handset RF PCB.
Adjust VR601 to indicate ±8kHz Dev.
RF PCB
J603
Battery
Connector
VR601
HANDSET MAIN PCB
J603
Battery
1kHz 10.5mV
MIC + Pin
Connector
DC 3.8V
Remarks
CT501
— 4 —
AF GEN.
DC Power Supply
RF TEST POINT
J501
VR502
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