Kirisun DP770 Service Manual

DP770 Service Manual
VOX 10
Set comprehensive
instrument to tx mode 1)
AFGen1 Freq:1kHz;
2)
A
FGen1 Lvl: 5mV
HP8921A or
similar
instrument
Connect mic
port of the radio
to audio out of
test instrument
PC
1）Enter tune mode
2）Double click”VOX10”.
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.
*
Low battery
warning
* multimeter
Battery
connector
*
1）Enter t tune mode
2）Set the power supply voltage to 6.8V；
3）Click save when value is stable.
The low battery starts to
work when the voltage is
below 6.5V.
The radio will power off
when the voltage is below
5.8V.
The radio can work when
the voltage is above 7.2V.
CV Curve PC
1
）
Enter tune mode.
2）Double click “TX CV Curve”
3）
Click “Start”
4) After adjustment, click save
Low point：＞=0.5V
High point：＜4.5V
6.2.4. Receiver section adjustment instruction
Item Configuration
Test Tool and Method
Standard
Requirement
Test
Equipment
Test point Tool Method
Receiver
sensitivity
1)Set comprehensive
instrument to RX mode
2）Set RF Gen Freq to F1、
F2、…、F8，Eg：Set RF Gen
Freq to 469.95MHz when
testing F8
3）Set AFGen1 Freq to 1kHz
Set AFGen1 to 3kHz
4)
S
et HF(High filter) to 300Hz
and LF(low filter) to 3KHz
HP8921A or
similar
instrument
Connect the
antenna port to
RF IN/OUT port
of instrument by
antenna
connector
adapter, Connect
universal
connector
of
radio to audio in
of test instrument
by test cable
PC
1) Enter tune mode
2) Double click “receiver sensitivity”. Enter F1
to F8 to adjust different frequency.
3）Set input signal strange to -119dBm, adjust
pc value to max the SINAD and the SINAD
is above 12dB .
4）Click save to save it.
SINAD>=12dB
W：-119dBm；
N：-118dBm。
Page 28 of 102

Kirisun DP770 Specifications

General

Brand	Kirisun
Model	DP770
Category	Radio
Language	English