Chapter 8: Audio Module, Rev 1.1
5. Note test time.
6. 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.
7. Download a small data set using the Client PC containing transmit and receive VHF
audio tests ((For more information go to the Operator’s Manual, Chapter 4: Data Retrieval
for download instructions).
8. Playback the data to ensure both transmit and receive data is recorded properly.
9. Repeat steps 1 to 8 for any additional radios connected to the VDR.
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. This practice is very good for commissioning and Annual Performance Test (APT) as well.
VDR-100G3/G3S Installation Manual 06/10/2008
8-38
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