QUANTUN QP650U Plus, Service Manual

Page: 50 / 67

QP-650U Plus Adjustment Description
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Adjustment Description
The radio can be adjusted by manual adjustment. Manual adjustment procedure is as follow. (Refer to
“All reset mode” and “manual adjust mode” in the section
Software Specification
.)
Instrument:
Radio Communication Test Set 1 set
3A/10V Power Supply 1 set
Digital Voltmeter 1 set
3A Ammeter 1 set
‹
Adjustment:
1. Initializing:
It’s necessary to initialize the radio before alignment because there is no needed information in
EEPROM when the radio is manufactured. Please refer to the “all reset mode” in the section
Software Specification
for details.
2. Adjustment:
Some items can be adjusted in conventional communication mode and the others in manual adjust
mode. Turn on the power, the radio enters conventional communication mode. If manual adjust
mode is enabled, Please refer to the section
Software Specification.
User Mode
VCO
Measurement Adjustment
Item Condition
Test Instrument Terminal Part Method
Specification/
Remarks
1. Setting Power supply 7.5V
1. Turn to CH6. Press PTT.
TX High Frequency
Turning 4.0V±0.2V
2. TX VCO lock
voltage
2.. Turn to CH4, Press PTT
TX Low Frequency.
Check 1.0V±0.2V
1. Turn to CH6. RX Hig Turning 4.0V±0.2V 3. RX VCO lock
voltage
2. Turn to CH4, RX Low
Digital Voltmeter CV
TC100
TC101
Check 1.0V±0.2V