ASL INTERCOM SMC02, Product Manual, Page: 44 / 60

SMC02G/SMC02F/Variants - Product Manual
5.7.4 Microphone Equalisation
Menu: Configuration Æ System Æ Router Æ Inputs Æ Mic/Line Æ < I/P # nn – MIC/LINE nn >
Æ < Zoned Fire Microphone or Paging Microphone > Æ Audio Æ EQ
Possible values: –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.
5.7.5 Microphone Fade Up and Down Times
Menu: Configuration
Æ
System
Æ
Router
Æ
Inputs
Æ
Mic/Line
Æ
<I/P # nn – MIC/LINE nn >
Æ < Zoned Fire Microphone or 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’
It is possible to specify a fade up and fade down time for each Mic/Line input or Music input. This can be set
to provide the desired changeover fading, e.g. when a broadcast interrupts background music, or a lower
priority broadcast.
This is typically used on background music where a slow fade-up, in particular, is desirable.
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
The Fade Up time is the time the signal takes to fade up when:
•
Turned on (routed);
•
Override removed.
The diagram in Figure 10 illustrates the sequence of events during the enabling and disabling of a single
audio source (e.g. background music).
Issue: 02 complete, approved
Page 44 of 60