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CM-CU21 - Introduction 2
2 CM-CU21 Commentator Unit
Introduction
Fig 2-1: CM-CU21 Commentator Unit
The CM-CU21 Commentator Unit is a high quality, portable broadcast mixer
and 4-wire talkback unit. Its sturdy construction and flexibility of features
make it suitable for use in a wide variety of environments.
It provides two fully featured commentator positions and a third guest
position that can alternatively be used as a line-level input, allowing
program idents/effects to be mixed with the commentator inputs. Each
position has an individual output, with two additional outputs providing a
mix of all active commentary channels. A limit indicator on the main panel
shows when the adjustable limiter on the mix outputs is active, and a bright
21 segment LED PPM meter, which can be disabled, shows the main output
level.
Two talkback output channels, with a built in limiter, are
available to each of the two main commentators. They have
adjustable gain and can be linked to provide simultaneous
operation.
A wide input gain range and switchable phantom power on each
commentary position provides supports for a variety of microphone
types, from high output phantom units to low output ribbon
microphones.
There are 4 transformer balanced return audio inputs which, along with the
commentator inputs, are routed to the headphone monitor controls. With
these headphone controls, any input can be level adjusted, and sent to
either the left, right or both ears.
A GPIO port gives an open-collector driven output indication of any active
on-air or talkback channels, and four remote inputs can be configured to
provide either an external call/alert to each of the talkback controls, or
external control of the talkback function. See Configuration Options on
page 23 for details of the available settings.
The Commentator Unit has a built in line-up tone generator for easy
channel identification and cabling checks, and a flexible range of options
allow the unit to be customised to better suit the operational and users’
personal requirements.
