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Model 233 User Guide Issue 1, September 2007
Studio Technologies, Inc. Page 29
present on the outputs unless power has
been supplied. Specifically, the micro-
phone does not passively “cut through”
to the main output connector!
Upon Model 233 power up, the four status
LEDs will light in succession as a firmware
“boot up” indication. The unit will then
begin normal operation. Depending on
the selected configuration, one LED as-
sociated with the state of the main output
may be lit. The user is now presented with
three buttons, four LEDs, and three rotary
controls. These are simple to operate and
understand, as will be described in the fol-
lowing paragraphs.
Pushbutton Switches and
Status LEDs
Three pushbutton switches are used to
control the main output and the talkback
functions. The way each operates de-
pends on the selected configuration. Four
LED indicators are located adjacent to the
buttons. They reflect the status of the main
output and talkback functions.
Main Output Button and LED Indicators
The button on the left, factory labeled as
COUGH, functions according to the se-
lected configuration. Two LED indicators,
located directly above the button, are
associated with the status of the button
and/or the main output. If the Model 233 is
set to the on-air mode the green LED, lo-
cated on the right, is lit whenever the main
output is active. This could be considered
as an “on-air” or mic active indicator. At
the least it should serve as a “careful what
you say” warning! The red LED, located
on the left, will be lit whenever the main
output is muted. This indicates that it’s
safe to speak as one sees fit.
If the Model 233’s system mode is config-
ured for production the red LED will never
light. This is to reflect the fact that the main
output button has now taken on a function
similar to that of one of the talkback but-
tons. To clarify, when the Model 233 is set
to the production mode the red LED will
never light while the green LED will light
whenever the main output is active.
Main Output Button Modes
If the Model 233 is set for the on-air mode:
• Push to mute: If this mode is selected
the main output is normally active. The
main output will mute whenever the but-
ton is pressed and held.
• Push to talk: If this mode is selected
the main output is normally muted. The
main output will become active when-
ever the button is pressed and held.
• Alternate action: If this mode is selected
the main output will alternate between
its active and muted states whenever
the button is pressed. Upon power up
the main output will be in its muted
state.
• Hybrid: This mode is a combination
of push to talk and alternate action. It
is similar to the way that talk buttons
function on user stations associated
with broadcast or production intercom
systems. If the button is pressed and
held the main output will become ac-
tive and remain active until the button
is released. If the button is momentarily
“tapped” the main output will change
state. Upon Model 233 power up the
main output will be in its muted state.
Talkback activity will always cause the
main output to be placed in its off state.
If the main output was in the “latched” on