Hytera PD415 - 8 Tuning Description; Required Test Instruments; Tuning Procedures; Tuning the Radio

VHF1 (136
‐
174 MHz)
Tuning Description
25
8. Tuning Description
8.1 Required Test Instruments
 Radio communication test sets: Aeroflex 3920 and HP8921
 Power supply: 3 A/10 V
 Multimeter
 Tuner software
8.2 Tuning Procedures
8.2.1
Tuning the Radio
After re-assembling the radio, you need to tune it with the Tuner software.
Note
The items to be tuned and tuning operations are described in the table below. Click the “Save” button on
Tuner to save the tuned value to the radio after each tuning.
Item Method
Tx Section
Reference Oscillator
Warp
1.
Connect the antenna connector of the radio to the RF port of HP8921,
and set HP8921 to TX test mode.
2. Open the Tuner software and go to “TUNE_DATA -> TX -> Reference
O
scillator Warp” in the left navigation tree. Then click the “Transmit On”
button.
3. Adjust the vernier on the Tuner until the frequency deviation between the
frequency displayed on HP8921 and the frequency (Tx) displayed on
Tuner is less than or equals to 40 Hz.
4. Click the “Transmit Off” button on Tuner.
Transmit Power
Calibration
Here we take the tuning of low TX power for example.
1.
Connect the radio to HP8921 via the antenna connector, and set HP8921
to TX test mode.
2. Open the Tuner software and go to “TUNE_DATA -> TX -
> Transmit
Power Calibration” in the left navigation tree. Then select an appropriate
channel.