Abell TH-308GB UHF, Servise Manual

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TH-308GB UHF SERVICE MANUAL
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Use the TH308GB programming software for adjustment the following item in the PC mode
Squelch Level, Transmit frequency, RF power, QT deviation, Battery level
Section common to the transmitter and receiver (VCO)
Measurement Adjustment
Item Condition Test
Equipment Terminal Parts Method Specification/Remarks
1. Setting 1)Power supply voltage
Battery terminal ： 7.5V
1) ： CH: TX high 3.7V ± 0.2V
2) ： CH: RX high
Digital
voltmeter
TP1
TC2
3.7V ± 0.2 V
3)
：
CH: TX low
2.VCO
lock
voltage
4)
：
CH: RX low
Check More then 1.0V