REVISION C
BMX SERIES III CONSOLE
36
PACIFIC RESEARCH & ENGINEERING
The MUTE control input may be used to remotely control the mute function of the Studio Monitor
Module. A typical application would be to provide a host with a Monitor Mute button in those
installations where a monitor volume control is not provided in the Studio itself.
The TALKBACK control output is a current-sinking open collector, which is active (low) whenever
the Studio is receiving Talkback from another location. This command is intended for connection to
active, self-contained, headphone and monitor systems, and is used to switch the Talkback signal into
the headphone and monitor circuits. Such headphone and/or monitor systems are usually provided to
the host and co-host positions.
The MUTE control output is a current-sinking open collector, which is active (low) whenever a Studio
microphone is ON. This command is provided for interface to intercoms, telephones and/or other
external equipment which may need to be muted whenever a Studio microphone is “live”.
The DIM control output is a current-sinking open collector, which is active (low) whenever Talkback
is occurring from the Studio to another location. This command is provided for similar applications
as the MUTE Command.
The STUDIO WARNING tally is a 12 volt DC, 150 mA maximum, source output for connection to
a magnetic or solid-state relay unit for driving the Studio entry warning light(s).