1.
Tuning Description
1.1
Required Test Instruments
Radio communication test set (Aeroflex 3920 and HP8921)
18V/3A regulated DC power supply
Multimeter
Tuner software
1.2
Tuning Procedures
1.2.1
Tuning a Radio
After the radio is reassembled, it is required to use the Tuner software to tune it.
The specific operations are described in the table below:
Item
Method
TX Section
Reference Oscillator
Warp
1. Connect
the
antenna
connector of
with the HP8921, and set the
HP8921 to TX test mode.
2. Open the Tuner software, go to “TUNE_DATA -> TX” and double click
“Reference Oscillator Warp” from the navigation tree on the left. Then
click the “Transmit On” button.
3. Observe the frequency displayed on HP8921, and adjust the vernier until
the frequency offset is less than or equals to 40Hz.
4.
Click the “Transmit Off” button.
5. Click
the
“Save” button to save your settings.
Transmit Power
Calibration
1. Connect
the
antenna
connector of
with the HP8921, and set the
HP8921 to TX test mode.
2. Open the Tuner software, go to “TUNE_DATA -> TX” and double click
“Transmit Power Calibration” from the navigation tree on the left. Then
select an appropriate channel.
3. Click the “Transmit On” button.
DH-9100
DH-9100