Sonifex CM-CU21, User Handbook Manual

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CM-CU21 Commentator Unit User Handbook
CM-CU21 COMMENTATOR UNIT
2
M
AIN P
ANEL C
ONTR
OLS & INDIC
A
TORS
return audio inputs Prog, A, B and C 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
section 5 Configuration Options on page 10 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 two main commentator positions have six sets of headphones controls which allow
them to monitor all of units’ return audio and active commentator inputs. 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 signals are only routed to the headphone monitor controls when the
corresponding On Air control is active. It is possible to route each of these signals to the
headphones permanently, regardless of the state of the corresponding On Air control.
See section 5 Configuration Options on page 10 for details.
The guest position, commentator 3, can be set to accept a line level input, and an
additional option can be configured to prevent this signal from being routed to the
commentator 1 and 2 headphone monitors.
The headphone controls for the third commentator position consist of left and right level
adjustment potentiometers, and a switch to select the routing for the commentator input
signals. With the switch in the left position, commentator 1 is heard in the left ear and
commentator 3 is heard in the right ear. With the switch in the right position, commentator
2 is heard in the right ear and commentator 3 is heard in the left ear. When the switch is in
the centre position, commentator 1 is heard in the left ear, commentator 2 is heard in the
right ear and commentator 3s’ own signal is heard in both ears.
Commentator 3 Line Input Level Control
When the third commentator input is set to accept a line input, this potentiometer sets
the gain applied to the signal prior to being routed to the headphone monitor and main
output channels. The gain range is -83dB to +10dB with a maximum input level of +25dBu.
PPM Meter Display
The 21 segment LED PPM meter display indicates the level of the signal on the mix outputs.
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
section 5 Configuration Options on page 10 for details.