EN Dateq BCS70 Manual Operating instructions 24
Talking and coughing to the COM bus (Cough > Com)
Normally an announcer or guest can set the corresponding module in the mixer unit to CUE
using the cough button and at the same time mute the channel. In combination w ith the
MASTER CUE cue function, the DJ / technician can then be spoken to.
In the BCS70 it is also possible to have this form of communication going not via the CUE bus
but via the COM bus. Configure the required modules as COUGH > COM using the Setup mode.
Now , if the cough button is pressed, the channel is muted -and the user can still cough- but
the module’s signal is sent to the COM bus and thus to everyone w ho is listening to the COM
bus (the director, for example). The DJ / technician is then not disturbed unnecessarily.
QDM²
The external hybrid automatically gets the correct N-1 return f rom the COM, CUE, AUD or PGM
bus. This is the so-called Quadruple Dynamic Mix-Minus system, shortened to QDM
2
. Since the
BCS73 generates the N-1 signal itself, separate 'clean feeds' are not necessary. The number
of BCS73 modules w hich can be used at the same time is therefore theoretically unlimited. In
practice, the number of telephone lines w hich can be used at the same time is limited by the
quality of the telephone hybrids used.
If AUD is selected as w ell as PGM, the return from the PGM bus has priority over the return
from the AUD bus. The LED in the PGM button lights up more brightly than that in the AUD
button in this case.
CUE has a higher priority than AUD or PGM. As soon as CUE is selected on a BCS73 module,
the external hybrid gets the return from the CUE bus. This is only possible if the module is
sw itched off.
COM has the highest priority if the channel is sw itched of f. If the COM button of a BCS73
module is pressed, the signal from the connected hybrid is routed to the COM bus. The LED in
the COM button then lights up and everyone listening to the COM bus can hear the external
hybrid. The external hybrid also gets the return signal from the COM bus so that the person on
the other end of the telephone line can listen to w hat is being said on the COM bus. Press on
the COM button again to sw itch the hybrid aw ay from the COM bus again. The LED in the COM
button goes out.
If COM has been selected and the channel is on, then, depending on the routing set, the
module gets the return from the PGM or AUD bus. To indicate that COM does not give a return
in this situation, the LED in the COM button starts to flash.
If the channel is turned off and COM and CUE are both active, the module gets the return from
both these busses.
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