Studio Technologies 212 2006 - Manual (Page 23)

Model 212 User Guide Issue 3, July 2006
Studio Technologies, Inc. Page 23
light accordingly. The on-air mode should
be selected for all on-air broadcast ap-
plications. It’s imperative that the main
output channel be muted whenever on-air
talent uses the talkback output channel to
communicate with production personnel.
When the system mode is set for the on-
air MNF mode things become quite differ-
ent. The main (left) button is changed to
serve as the talkback button. It is set for
push-to-talk operation. When the talkback
function is active the green LED, located
above the left button, will light. The talk-
back (right) button is changed to serve as
a relay control button. It is set for push-
to-activate-the-relay operation. When the
relay is activated the green LED, located
above the right button, will light. Pressing
and holding both buttons will cause the
main output to mute; the talkback output
and the relay will not enable. This cre-
ates a “cough” function. When “cough” is
active the red LED, located above the left
button, will light. Note that this mode may
be used as part of implementing a sec-
ond talkback output. While technically the
right button activates the relay, the result-
ing function might be to enable an analog
talkback output.
Figure 14. Relay mode settings
Three modes are available:
• Relay is disabled: In this mode the relay
is disabled and will never change state.
• Follows main output status: In this mode
the relay will follow the state of the main
output channel. Specifically, the relay
will change state (energize) whenever
the main output channel is active.
• Follows talkback button status: In this
mode the relay will follow the state of the
talkback output channel. Specifically,
the relay will change state (energize)
state whenever the talkback output
channel is active.
System Modes
Switches SW3-11 and SW3-12 are used
to configure the overall operating mode
of the Model 212. Specifically, they deter-
mine how the main output channel oper-
ates vis-à-vis the talkback output channel.
Understanding how the three modes
impact overall system operation will en-
sure that correct operation and maximum
usability will occur. When the on-air mode
is selected, the main output channel will
mute (minimum digital audio signal level
or –infinity) whenever the talkback output
channel is active. The LED indicators as-
sociated with the main output button will
Figure 15. System mode settings