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Item Method
6. Press the Enter key on the keyboard to confirm your settings.
7. Click the “Transmit Off” button on Tuner.
8. Click the dialog box below LOW_PORT.
9. Select another channel and repeat Step 4 to Step 6.
10. Select another channel and repeat Step 3 to Step 6.
Voltage
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 -
Oscillator Voltage” in the left navigation tree.
3. Click the “Save” button to save the tuned value to the radio.
Rx Section
Front-end Filter
1. Connect the antenna connector of the radio to the RF port of HP8921.
2. Connect audio output port of accessory connector o
audio input port of HP8921, and set HP8921 to RX test mode.
3. Set HP8921 as follows:
Output RF signal: -118 dBm/Frequency (current channel frequency)
Modulation frequency: 1 kHz
Modulation deviation: 3 kHz
De-Emphasis: 750 μs
4. Adjust the vernier on Tuner until the “SINAD” value displayed on HP8921
is greater than 14 dB.
5. Set HP8921 to output a RF signal with a value that equals to “-25
dBm/(current channel frequency-29.025 MHz)”.
6. Adjust the vernier on Tuner until the “SINAD” value displayed on HP8921
is less than 14 dB.
7. Press the Enter key on the keyboard to confirm your settings.
Front-end Gain
1.
Connect the antenna connector of the radio to the RF port of HP8921,
and set HP8921 to RX test mode.
2. Set HP8921 to output an unmodulated RF signal with a value that equals
to “-70 dBm/Frequency (current channel frequency)”.
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