ASL INTERCOM MPS Series, Configuration Manual

Page: 27 / 60

MPS-Series – Configuration Guide
U-0664-0265.doc – Issue: 03 complete, approved
Page 27 of 60
b. Ensure that the Night Time Volume Control is inactive, by setting it to ‘Off’:
Menu: Configuration or Config Æ System Æ Router Æ Noise Æ Off
c. Ensure that all Volume Controls are set to maximum volume, i.e., control at position ‘11’.
d. Make broadcasts from the fist microphone and confirm that they are free of acoustic feedback.
e. If feedback is encountered or volume adjustment is required in a particular zone (or one or more of the
group of zones) even though all inputs have been balanced, and all outputs have been set to the
correct volume for all other inputs, then reduce the Relative Output Gain for the associated output until
the feedback is eliminated.
Menu: Configuration or Config Æ System Æ Router Æ Inputs Æ Mic/Line Æ < I/P # nn – input name >
Æ Paging Microphone Æ Audio Æ Gain Æ O/pGains or Outputs
f. Re-enable any ANS for the output associated with the microphone, by setting it to ‘On’:
Menu: Configuration or Config Æ System Æ Router Æ Outputs Æ < O/P # nn – output name > Æ ANS
g. If required, activate the Night Time Volume Control, by setting it to ‘On’:
Menu: Configuration or Config Æ System Æ Router Æ Noise Æ On
h. Set all Volume Controls to the required volume.
4.4.4 Microphone Equalisation
Menu: Configuration or Config Æ System Æ Router Æ Inputs Æ Mic/Line
Æ < I/P # nn – input name > Æ Paging Microphone Æ Audio Æ EQ
Possible values: HF (High Frequency) section: –12dB to +12dB (1dB steps)
MID (Mid Frequency) section: –12dB to +12dB (1dB steps)
LF (Low Frequency) section: –12dB to +12dB (1dB steps)
System default configuration: ‘0dB’
A 3-band equaliser is provided on Mic/Line inputs in order to balance the input tone. This equaliser has a
shelving HF (treble) adjustment, shelving LF (bass) adjustment, and a fixed MID section adjustment.
A High Pass filter is also configurable. This would typically be used on microphone inputs to prevent
excessive ‘pop’ noise.
Set the equaliser as required.
4.4.5 Microphone Fade Up and Down Times
Menu: Configuration or Config Æ System Æ Router Æ Inputs Æ Mic/Line Æ < I/P # nn – input name >
Æ Paging Microphone Æ Audio Æ Fade
Possible values: 00 to 50 (Time in tenths of a second. Divide by ten for the time in seconds.)
System default configuration: ‘Up=00’ and ‘Down=00’
The Fade Down time is:
•
The time it takes for the signal to fade down when turned off (un-routed);
•
The time it takes for the signal to fade down before an overriding broadcast is made in its place