Kirisun DP770 Service Manual

DP770 Service Manual
6.2.2. Adjustment Equipments
（1）Comprehensive test instrument(HP8921 or similar equipment)
（2）Computer and CPSp software
（3）AEROFLEX 3920
（4）spectrum analyzer
6.2.3. Adjustment instruction of TX
Item Configuration
Test Tool and Method Remark
Test
equipment
Test Point Tool Method
Frequency
Stability
Set comprehensive instrument
to tx mode
HP8921A or
similar
instrument
Connect the
antenna port to
RF IN/OUT port of
instrument by
antenna
connector adapter
PC
1)Enter tune mode;
2)Double click frequency stability
3)Adjust the value in tune mode to make
the tx frequency to be within+/-480Hz
4) Observe TX current
5) Click “Save” to save it.
≤±500Hz
Tx High
Power
Set comprehensive instrument
to tx mode
HP8921A or
similar
instrument
1)Enter tune mode;
2)Double click TX high power, and enter
frequency F1 to F8 to adjust high power
output at different frequency.
3)Adjust the value in tune mode to make
the tx high power to be within 4W+/-0.2W
4) Click “Save” to save it.
1) Power:3.7W-4.5W;
2) Current:<1.8A
Tx Low
Power
Set comprehensive instrument
to tx mode
1)Enter tune mode;
2)Double click TX low power, and enter
frequency F1 to F8 to adjust low power
output at different frequency.
3)Adjust the value in tune mode to make
the tx high power to be within 1W+/-0.2W
4) Observe TX current
5) Click “Save” to save it.
1）
Power:0.7W-1.5W;
2) Current:<1A
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Kirisun DP770 Specifications

General

Brand	Kirisun
Model	DP770
Category	Radio
Language	English