Abell A-82 - Transmitter Adjustments

ABELL A-82 UHF Service Manual
第 19 页 共 41 页
A-82 Adjustment Instruction
Version 1.0
Use the A82 UHF programming software for adjustment the following item in the PC mode.
Squelch Level, Transmit frequency, DQT balance, RF power, QT deviation, DQT deviation, Battery level, Section
common to the transmitter and receiver (VCO)
Section common to the transmitter and receiver (VCO)
Measurement Adjustment
Item Condition
Test
equipment
Terminal
Parts Method
Specifications/Remar
ks
1. Setting 1)Battery Voltage：
7.5 v
Digital
voltmeter
BATT
7.5V±0.1V
1)：CH: TX High TC100 Adjust
adjustable
condenser
3.7V±0.1V
2)：CH: RX High TC101 Adjust
adjustable
condenser
3.7V±0.1 V
3)：CH: TX Low Check out Higher than 1.0V
2. VCO lock
voltage
4)：CH: RX Low
Digital
voltmeter
TP1
Check out Higher than 1.0V
Transmitter Section
Use the A82 UHF programming software for adjustment the following item in the PC mode.
Measurement Adjustment
Item Condition
Test equipment
Termina
l
Condition Method
Specifications/Rem
arks
1.
Frequency
difference
adjust
Testing Channel
CH: 03
F. counter Program Software
Frequency difference
adjust(middle)
Enter Frequency
Deviation adjust
Enable PTT,
adjust data
change frequency
Choose Save Data to
finish the adjustment
Frequency
difference:within
±100Hz
2.
High frequency
adjust
Program Software
High frequency
adjust
(High,Middle-High,
Mi
ddle,Middle-low,
Low
Enter high frequency
adjust
Enable PTT,
adjust data
Change power/current
Choose Save Data to
finish the adjustment
Power:4.3W±0.2W
Current:under 1.7A
3.
Low frequency
adjust
Test Channel
CH:01,02,03,04,05
Battery :7.5V
Power meter
Ammeter
Antenn
a
Termin
al
Program Software
Low frequency adjust
(High,Middle-
High,Mi
ddle,Middle-
low,Low)
Enter Low frequency
adjust
Enable PTT,adjust data
Change power/current
Choose Save Data to
finish the adjustment
Power:1.5W±0.2W
Current:Under 1A