Manual

CM-CU1 Commentator Unit User Handbook
7
REAR PANEL CONTROLS & CONNECTIONS
REAR PANEL CONTROLS & CONNECTIONS
4
Test Tone Manual Mode
With the test tone in manual mode, the ON AIR and TALKBACK buttons flash amber. The
test tone can be routed to the Comm and Talkback Outputs by pressing the ON AIR or
corresponding TALKBACK buttons. The ON AIR button illuminates red when pressed and
the TALKBACK buttons illuminate green. When the button is released, the tone on that
output is muted.
Test Tone Auto Mode
With the test tone in auto mode, each of the Comm and Talkback outputs are automatically
identified by a unique number of short tone bursts, lasting 0.25 seconds each, which
are repeated every 3 seconds. Each button flashes when tone is being routed to the
corresponding output. The number of pulses on each output is shown below:
Comm 1 pulse
Talkback A 2 pulses
Talkback B 3 pulses
Talkback C 4 pulses
Talkback D 5 pulses
The 5 return audio inputs function normally when the test tone is enabled. This could
be useful in allowing the user to receive instructions on which channel to output tone
to when using the test tone in manual mode. When the test tone is disabled, normal
operating mode is resumed and the On Air and Talkback buttons return to the state they
were in prior to entering test tone mode.
Return Audio Inputs
The five transformer balanced return audio inputs, Prog, A, B, C and D are via 3 pin female
XLR-3 connectors with the following connections:
Pin 1: Ground
Pin 2: Phase
Pin 3: Non-phase
Audio Outputs
The electronically balanced commentator output, and the transformer balanced talkback
A, B, C and D and mix outputs are all via 3 pin male XLR-3 connectors with the following
connections:
Pin 1: Ground
Pin 2: Phase
Pin 3: Non-phase
DC Supply Input
The commentator unit can be powered from an external, regulated 12V or 24V DC power
source. The DC input is via a 4 pin male XLR-4 connector with the following connections: