User's Manual

26
Adjustment Description
Before the adjustment, please beforehand save the user’s setting.
Required Test Instrument
1. Stabilized power supply 1set
1) The supply voltage can be changed between 2V and 6V DC, and the output
current is 2A or more;
2) The standard output voltage is 3.6V DC;
3) The power supply output voltage stabilizes.
2. Ammeter 1 set
3. Digital Voltmeter 1 set
4. Radio Communication Test Set 1 set
Test and Adjustment
1. Setting: Put the main unit under test on the jig (Note: Make sure the test terminal
and the jig connect well), and turn on the power.
2. VCO
Enable “Default Set Mode” function in programming software. And then press “+”, “-”
and “MENU” keys simultaneously to turn on the radio and enter adjustment mode.
Measurement Adjustment
Item Condition
Test
Instrument
Terminal Parts Method
Specification/
Remarks
Transmit
VCO lock
voltage
CH1:
Transmitting
Digital
Voltmeter
P6 L22
Adjust L22 using
ceramic
screwdriver until
the lock voltage
reaches the
selected range
2.5±0.1V
Receive
VCO lock
voltage
CH1:
Receiving
Digital
Voltmeter
P6 L22 Check Around 1.0V
3. Receiver
Measurement Adjustment
Item Condition
Test Instrument Terminal Parts Method
Specification/Remarks
RX IF
demodulation
output
A
djust to CH1.
Press MON for
1 second to
receive.
Radio
Communication
Test Set SSG:
-60dB
MOD: 1KHz,
DEV: 1.5KHz
FILTER:
0.3~3KHz
Antenna
Mic jack
L20
Adjust L20
using ceramic
screwdriver
until the max.
AF output
signal
appears.
When adjusting,
rotate the volume
control to the right
position so that the
output won’t limit.