4. Use a second VHF radio (not connected to VDR) to broadcast a second test on the same
frequency to ensure that the audio received is recorded correctly. Again, note the time of
the broadcast and receipt test.
5. Download a small data set using the VDR Player software.
6. Playback the data to ensure both transmit and receive data is recorded properly.
It is advised that you combine live microphone sound/recording test with the VHF sound/recording
test while you have all NMEA devices turned on as well as radar screen active (at least in STBY.
Mode) so that your recording contains everything possible connected to the VDR.
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