Chapter 8: Audio Module, Rev 1.1
7. Deselect Audio Test from the Test menu of the record application. This stops the
audio test;
8. Compare the mic test results for each channel;
For example:
Mike 1 test – chirp detected on channel 1 – 843.978 (157.183)
Mike 2 test – chirp detected on channel 1 – 863.978 (167.183)
9. Determine the highest RMS Microphone Test Value;
For example:
Mike 2 test – chirp detected on channel 1 – 863.978 (167.183)
10. Divide the RMS Microphone Test Value by 0.707
For example:
167.183 / 0.707=236.47
Note! The Detection Threshold Calculations are a guide to place the values within
an operating range. It may be necessary to set the Detection Threshold levels
higher by adding 5 percent to the calculated value to ensure successful test
results.
11. Repeat the above steps for each channel requiring a detection threshold setting for a
microphone.
Note! The audio testing procedure, and calculation of the detection threshold for
each channel, should be repeated several times to ensure the results produce a
consistent successful test result.
12. Edit the value into the Open the <vdrparams.ini> file from the Windows desktop. as
the value. Alternatively steps 10, 11 and 12 can be performed through the Audio
Configuration Suite;
13. Scroll to the [AUDIO] section and edit the following settings for bridge audio
testing configuration.
DetectionThreshold1 = 500
DetectionThreshold2 = 500
DetectionThreshold3 = 500
DetectionThreshold4 = 500
DetectionThreshold5 = 500
DetectionThreshold6 = 500
NOTE:
If it is necessary to set more than 6 detection thresholds then this is done by adding
DetectionThreshold7 & DetectionThreshold8 lines in the INI file below DetectionThreshold6.
14. Save the changes and close the <vdrparams.ini> file.
15. Select Audio Test;
16. Select “Perform Full Test” under the Audio A/D Menu;
17. The log window should display “Mike Test Performed Successfully”
NOTE: If the bridge is extremely noisy, the test may not pass until
after multiple retries. If the log does not
display “Mike Test Performed
VDR-100G3/G3S Installation Manual 06/10/2008
8-34
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