Kirisun DP770 Service Manual

DP770 Service Manual
Maximum
Deviation
Set the test instrument to tx
mode.
Set HF(High filter) to 50Hz
and LF(low filter) to 15KHz
）
H
P8921A 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 "Maximum Deviation".
3)Adjust the value in tune mode and view
the FM deviation on the test instrument
4) Make the FM deviation within 5.0±0.05kHz
5) Click confirm to save
4.95kHz-5.05kHz
Low
frequency
modulation
deviation
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” Low frequency modulation
deviation”
and enter to F1 to F8 to adjust
different frequency.
3
）Adjust the value in tune mode and view the
FM deviation on the instrument when AF
Freq is 0.1kHz
4
）Make the FM deviation within
5.0±0.05kHz.
5）Click save to save the data.
4.95kHz-5.05kHz
High
Frqnecy
modulation
deviation
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” high frequency modulation
deviation” and enter to F1 to F8 to adjust
different frequency.
3
）Adjust the value in tune mode and view the
FM deviation on the instrument when AF
Freq is 6.0kHz
4
）Make the FM deviation within
5.0±0.05kHz.
5）Click save to save the data.
4.95kHz-5.05kHz
VOX 1
Set comprehensive
instrument to tx mode 1)
AFGen1 Freq:1kHz;
2)
A
FGen1 Lvl:50mV
HP8921A or
similar
instrument
Connect mic
port of the radio
to audio out of
test instrument
PC
1）Enter tune mode
2）Double click”VOX1.
3 ）
Click “Start”, the radio will enter vox
adjustment automatically.
4
）Click “stop” when the value is stable.
5）Click save to save the data.
Test:
1）The vox will activate then
AFGen1 is set to50mV.
The vox will stop when
AFGen1 is below 15mV.
Page 27 of 102

Kirisun DP770 Specifications

General

Brand	Kirisun
Model	DP770
Category	Radio
Language	English