Chapter 8: Audio Module, Rev 1.1
8.4.7.2 Test Bridge Audio with a Voice/Sound Check
Once the [AUDIO] configuration is completed verify that the audio inputs are being recorded
correctly:
1. Record a short, live audio test;
2. Download the data; and
3. Listen to the audio quality of each audio output channel through playback software.
When recording audio for the audio test, it is important to speak clearly and in a
normal tone of voice within a normal distance of each microphone. A good voice
script includes the words “Testing Microphone (location)” followed by a voice
count from 1 to 10), a reverse count back to 1, ending with the words “Test Out”.
The procedure for testing audio inputs is as follows:
1. Start the VDR_Record application;
2. Ensure the VDR_Record application is operating in record mode;
3. Conduct the voice test as described above, repeating for each microphone location;
4. Note the start and finish time of each test;
5. Wait one minute in order to allow the system to complete the writing of the audio block;
6. Use the download Client PC to download a small data set containing voice audio tests
(For more information go to the Operator’s Manual, Chapter 4: Data Retrieval) for
download instructions; and
7. Play back the data to ensure bridge audio was recorded properly.
NOTE: It is preferable to conduct the Bridge Audio test during a quiet time on the bridge to
prevent noise interference with the voice recording. Such interference may invalidate the test if it
is not normal for the bridge.
8.4.7.3 Test VHF Radios
To test the VHF audio, a short broadcast must be completed.
NOTE: When broadcasting on VHF, ensure that no transmissions are made that could
be confused with anything other than a test transmission.
The voce test should be performed from another VHF radio (VHF2) so that you are now testing
the Rx signal recording of VHF1 and say the words “Test VHF1 Receive” followed by a voice
count from 1 to 5 (or 10) and reverse the count back to 1, finishing the transmission with words
“Test Out”.
To test the VHF recording is as follows:
1. Check the VHF wire connection to the VDR to ensure it is correct.
2. Start the VDR_Record application.
3. Ensure the VDR_Record application is operating in record mode.
4. Transmit the voice test as described above. A normal voice procedure is to say the
words:
“Test VHF1 Transmit”
Count from 1 to 10 and reverse the count back to 1,
Finish the transmission with words “Test Out”.
NOTE: When transmitting, ensure that the VHF is switched to a channel that cannot be confused
with any local distress or working frequencies
VDR-100G3/G3S Installation Manual 06/10/2008
8-37
To Next Page
Loading...