SoundCraft MBI 10 Series, User Manual

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COUGH/REVERSE TALKBACK Switch
This user-provided facility has two functions, as follows:
1) The Input Channel is muted when all of the following conditions are met: The
Mic input is selected, the Fader is up and the Cough Switch is closed. This allows
the Presenter/Guest to temporarily mute his or her microphone.
2) The Cough Switch allows the Guest to force a PFL so that he or she may talk
to the Presenter. This forced PFL occurs when all of the following conditions are
met: The Mic input is selected, the Fader is down and the Cough Switch is closed.
Two pins on the Remotes socket are used for this feature, as follows:
Ground Pin 2
Cough Pin 14
A switch may be connected between pins 14 & 2.
Insert Point (Send/Return)
Two pins on the Remotes socket are used for this feature, as follows:
Send Pin 22 Send 0V pin 21
Return Pin 23 Return 0V pin 18
You will need to remove link 5 from the pcb in order to use the insert Point.
Power Rails
The following power rails are available as follows:
+16V Pin 20 (supplied via a 10R current-limiting resistor)
-16V Pin 19 (supplied via a 10R current-limiting resistor)
0V audio Pins 18 and 21.
Options
Designating a channel as Local or Distant
Link 2 may be set to A for Local or to B for Distant. This will control which set of
speakers is muted when this channel is opened: if A is selected the Control Room
Monitor output will be muted, or if B is selected the Studio Monitor output will be
muted.
Aux - Pre-fade or Post-fade
The factory default for the Auxiliary Output on the Mono Input channel is pre-fade.
This may be altered to post-fade by moving link 3.
Phantom Power for Microphones
If Link 1 is in place then +48V will be present on pins 2 and 3 of the Mic XLR
connector. Phantom powered mics should not be plugged in with the +48V
switched on. You should also be aware that some mics draw an unusually large
current. The current for each mic is limited to 14mA by series resistors.
14 Applications