Model 372A User Guide
Issue 1, April 2019
Studio Technologies, Inc.
Page 15
MODEL 372A
INTERCOM BELTPACK
Push to Talk
When the button has been configured for the
Push to Talk mode how it functions is pretty
self-explanatory. Press and hold the button
when headset microphone audio is to be
sent out the Dante audio output (transmitter)
channel. The button’s green LED will light to
indicate that the output is active. The button
will not be lit when the function is not active.
Latching
If the button has been configured for the
Latching mode operation momentarily
pressing (“tapping”) the button will cause
the function to change states: off-to-on or
on-to-off. Whenever the talk function is
active the green LED will light. The button
will not be lit when the function is not active.
Push to Talk/Tap to Latch
If the button has been configured for the
Push to Talk/Tap to Latch mode operation
is a bit different and certainly more flexible.
Press and hold the button to activate the talk
function. When released the talk function
will turn off. Momentarily pressing (“tapping”)
the button will cause the function to change
states: off-to-on or on-to-off. Whenever the
talk function is active the pushbutton will light
green. The button will not be lit when the
function is not active.
Sidetone Function
The Model 372A includes a sidetone func-
tion that sends microphone audio to the
headphone output whenever the talk function
is active. The quality of the sidetone audio
should be excellent and will provide Model
372A users with a confidence signal that they
are actively talking to other intercom users.
Sidetone audio will always be sent to both
the left and right headphone output chan-
nels. This is because the function is trying to
simulate what a user would hear if they didn’t
have a headset covering both their ears.
An exception is if both Dante input channels
are routed to only the left headphone output
channel. In this case sidetone audio will only
be sent to the left headphone output channel.
The exact sidetone level is configured from
among five values within the STcontroller
application. There is also a selection choice
for turning off sidetone. There is no means
of adjusting the sidetone level using a physi-
cal button or control on the Model 372A unit.
Also, the two headphone level controls on the
top panel of the unit do not impact the side-
tone level.
In most cases the exact sidetone level
setting is not critical and typically users will
not be concerned about revising it. But set-
ting the sidetone level to something reason-
able is important. Setting the level too low
will encourage users to speak too loudly;
setting it too high and users will be tempted
to speak hesitantly. And while users aren’t
provided with a sidetone level control or
other adjustment means, should the need
arise STcontroller allows rapid adjustment of
the sidetone level. In most cases the default
sidetone level, Medium, should provide an
appropriate level.
Call Detection Display
A Model 372A function allows a call signal
that’s present on either Dante receiver (input)
channel to cause the pushbutton switch’s
LED to light. Whenever a call signal is de-
tected the button’s orange LED will first flash
and then light continually. Technically, a call
signal is achieved by sending a 20 kHz audio
tone on the desired Dante audio channel.
This signal is summed (mixed) with normal
talk audio. The Model 372A’s two audio input
channels continually monitor the audio input
for the presence of 20 kHz.
The detection circuitry will not confuse
normal talk audio signals with a call signal.
Summary of Contents for 372A
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