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1 CM-CU1 Mains Controls & Indicators
It is possible to configure the line input signal to be routed only when the
ON AIR button is active. See Page 10 ‘Config Page 2 - Line Input Routing
to Output’ for details.
TALKBACK Buttons
The TALKBACK A, B, C and D buttons allow the commentator’s microphone
signal to
be redirected to the corresponding
Talkback Output. The commentator
output is muted and the commentator’s signal is removed from the Mix
Output.
The five return audio inputs Prog, A, B, C and D function normally when a
Talkback channel is active, allowing full-duplex communication between the
commentator and a third party. These buttons have a momentary action
by default; press to activate, release to deactivate. See Page 9
‘Config
Page 1 - ON AIR Button Enable/Disable & TALKBACK Button Latching Modes’
for details of how to change the button action. When a Talkback control is
active, the button illuminates green and the corresponding open collector
driver output on the GPIO port is activated.
Headphone Monitor Controls
The commentator position has a set of six headphone controls which
allows it to monitor all of the units’ return audio and the commentator
and line inputs, if active. Each available input has an associated level
adjustment potentiometer and a headphone channel selector switch. Each
potentiometer provides a level adjustment from “full off” to “full on”, and
the headphone channel selector determines which ear the associated signal
is routed to; either the left, the right or to both ears when the switch is in
the centre position. By default, the commentator input signal is only routed
to the headphone monitor controls when the On Air control is active. It is
possible to route this signal to the headphones permanently, regardless of
the state of the On Air control line input. See Page 10 ‘Config Page 3 -
Commentator Mic & Line Input Routing to Headphones’ for details.
It is also possible to configure the presence of the line input signal in the
headphones using Config Page 3 too. By default, the line input signal is
permanently routed to the headphone monitor controls.
PPM Meter Display
The 21 segment LED PPM meter display indicates the level of the signal
on the Mix Output. The PPM scale conforms to IEC60268-10 11a and a dB
scale is also shown. There are options to set the brightness level of the PPM
meter, or it can be disabled if it is not required. See Page 10 ‘Config Page
5 - Limit LED Colour & Limit/Power LED Brightness’ for details.
Limit LED
The limit LED illuminates when the adjustable limiter on the Mix Output is
enabled and active. See Page 6 for information on the Limiter controls.
The colour and brightness level of the limit LED can be changed if required.
See Page 10 ‘Config Page 5 - Limit LED Colour & Limit/Power LED
Brightness’ for details.
Power LED
The power LED illuminates red to indicate that the unit has power from
either of its mains or DC inputs. If this indicator is not on when mains
power is connected to the unit, this may indicate a ruptured mains fuse
or a problem with the internal power supply module. The power LED also
indicates when the unit is in setup mode by flashing amber/red.
