ICS-2003 INTERCOM STATION
1-15
Mute Relay
The mute relay is activated whenever any talk selector is activated at the station.
The mute relay is commonly wired such that whenever it is activated, the volume
of the monitor speaker in that room is decreased (muted).
OPT-100 Auxiliary Audio Option
The OPT-100 Auxiliary Audio option provides the following features:
• Hot Mic output
• SA audio and relay outputs
• Auxiliary audio line level output
Hot Mic Output
The Hot Mic output is a balanced, line-level, transformer-isolated feed of the
signal from the currently selected microphone (panel or headset). The Hot Mic
output is active regardless of whether the station has talk paths set and regardless
of the front-panel’s control settings.
Studio/Stage Announce Audio and Relay Outputs
The SA output is a balanced, line-level, transformer-isolated feed with the same
signal sent to the Hot Mic output, except it is only active when the SA button on
the station’s front panel is pressed or when activated by Logic Input #1 or #2,
which is configured for the Studio Announce Function.
Auxiliary Audio Line Level Output
The Auxiliary Audio Line Level output is a balanced, line-level,
transformer-isolated feed of the input to the station’s internal speaker. For
example, this output could be used to feed an external amplifier connected to
loudspeakers.
EXPANSION PANEL OPERATION
Optional expansion panels provide additional selectors that operate the same as a
station’s selectors, including talk, listen, tally, and error indication.
The XPL-12 expansion panel provides 10 additional keys, while the XPL-22
provides 20 additional keys. Each expansion panel offers illuminated 5-character
labels for every key.
Only one rack unit (1RU) of a standard Electronics Industry Association
equipment rack is required for each expansion panel. The panels’ compact size
makes them ideal for use in TV control rooms, edit suites, mobile OB vans, and
any other location where many talk/listen keys are necessary but space it at a
premium.
Although the center button (5) on the station’s keypad is not marked for a
function, it has the function of displaying “listen” labels on any display expansion
panel (XPL-12 or XPL-22) connected to the station. Momentarily pressing and
quickly releasing the “5” button will cause all XPL panels to display the listen
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