Manual

4
CM-CU1 Commentator Unit User Handbook
MAIN CONTROLS & INDICATORS
MAIN CONTROLS & INDICATORS
2
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 11 ‘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 11 ‘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.