XIEGU X108G, Руководство по обслуживанию

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1) Set the receiving frequency of X108G to be 14.25000MHz, [USB] mode.
2) Connect the RF load to the antenna interface of the X108G.
3) Connect the TX output signal of the small signal board RF spectrum analyzer.
4) The output signal of the audio signal source is connected to a special test microphone,and open the
output of the audio signal source.
5) Press the PTT of speaker microphone to start the X108G transmitting, and observe the carrier output
power measured by the spectrum analyzer.
6) Adjust PotentiometerRW6to make the carrier power measured on the spectrum analyzer is minimum.
4.2.9 AM modulation debugging
Required machines and its settings
Machine Setting specs
Audio frequency generator Frequency:1kHz Amplitude:100mV-Vpp
Spectrum analyzer Central frequency:14.25MHz BW:10MHz
50W RF load
1) Set the receiving frequency of X108G to be 14.25000MHz, [AM] mode
；
2) Connect the RF load to the antenna interface of the X108G.
3) Connect the TX output signal of the small signal board RF spectrum analyzer.
4) The output signal of the audio signal source is connected to a special test microphone,and open the
output of the audio signal source.
5) Press the PTT of speaker microphone to start the X108G transmitting
，
and observe the power difference
between carrier and envelope which are measured by spectrum analyzer
6)
Adjust PotentiometerRW5
，
to make he carrier power is higher than the envelope power 14dB + 1dB.
PotentiometerRW6