VAR8 and Variants Operation, Commissioning, Fault Finding, and Maintenance Guide
sue: 02 complete, approved
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Page 39 of 166 Page 39 of 166
9.3 Audio Parameter Configuration 9.3 Audio Parameter Configuration
To Configure the Input Audio Parameters: To Configure the Input Audio Parameters:
5. Select the input, and then modify the required audio parameters as follows. 5. Select the input, and then modify the required audio parameters as follows.
6. Define a gain to be applied to the input audio, in respect of any output to which it may be routed. 6. Define a gain to be applied to the input audio, in respect of any output to which it may be routed.
Menu: ConfigurationÆSystemÆRouterÆInputsÆMic/LineÆI/P #<nn>Æ<mic type>ÆAudio
ÆGainÆInputs
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• The input gain of each audio input should normally be set so that all inputs are
balanced and give the same output level on each of the outputs.
• The default setting for an ASL microphone is –14dB. With ASL microphones any further
volume adjustments should be made using the output specific relative gains, as
described in next step.
7. Define the output specific relative gains.
Menu: ConfigurationÆSystemÆRouterÆInputsÆMic/LineÆI/P #<nn>Æ<mic type>ÆAudio
ÆGainÆOutputs
L
• Normally all input gains will be set to ‘balance’ each of the inputs, and the output gain
will be set to give the required level at each output. However, if any input is desired to
have a different gain in a particular output or outputs, then these inputs can be given a
different gain relative to each appropriate output. This could be used to e.g. avoid
feedback for a microphone which is located in one of its output zones.
• Any output level adjustment should be performed with the ANS function for that output
disabled, as described in Section ”18.2 Output Configuration for ANS Monitoring”.
8. Select whether or not the Router detects and reports loss of a low-frequency (LF) surveillance tone. The
detection threshold level is also adjustable.
Menu: ConfigurationÆSystemÆRouterÆInputsÆMic/LineÆI/P #<nn>Æ<mic type>ÆAudioÆSurv
For BS5839 compliance the input surveillance MUST be enabled on Fire Microphone.
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