Manual

Model 371A User Guide Issue 2, August 2019
Studio Technologies, Inc. Page 13
MODEL 371A
INTERCOM BELTPACK
red upon Model 371A power up to indi-
cate that the Dante interface is not ready.
After a short interval it will light green to
indicate that it is ready to pass data with
another Dante device. The SYNC LED
will light red when the Model 371A is not
synchronized with a Dante network. It will
light solid green when the Model 371A is
synchronized with a Dante network and an
external clock source (timing reference)
is being received. It will slowly flash green
when this specific Model 371A is serving
as the clock master for the network. It’s
possible that up to 30 seconds may be
required for the SYNC LED to reach its
final state.
Compressor Active LED
A yellow LED indicator is located on the
bottom panel adjacent to the headset
connector. Labeled COMP, the LED dis-
plays the status of the microphone audio
compressor function. It will light whenever
the input level from the microphone, along
with the configured preamplifier gain, is
such that the dynamic range of the talk
signal is being controlled. It’s perfectly ac-
ceptable for this LED to light intermittently
whenever a user is talking at a normal
voice level into the associated micro-
phone. But if the COMP LED lights solid
while a user is talking at a normal voice
level this will typically indicate that the mic
preamp gain setting should be reduced.
Conversely, if the COMP LED almost never
lights when normal talking is taking place,
it’s possible that changing the mic preamp
gain to the higher setting would be ben-
eficial. Note that due to the design of the
circuitry the compressor active LED will
function whether or not either or both of
the talk channels are active.
Headphone Output
Two rotary potentiometers (“pots”), lo-
cated on the Model 371A’s top panel,
allow individual adjustment of the level of
the two audio input signals as they are
sent to the headphone output. The audio
signal that is sent to the headphone out-
put will be the sum (mix) of the two input
signals. The pots are “push in/push out”
type which allow their associated knobs
to be in their “out” position to be adjusted
and then moved to their “in” position when
protection from an unwanted change is
desired
Users should find the headphone output
audio quality to be excellent, with high
maximum output level and low distortion.
Audio signals do not pass directly through
the level pots. The position of the pots is
recognized by the Model 371A’s proces-
sor which then adjusts the signal level
within the digital domain. When a pot is
in its fully counterclockwise position the
associated audio signal is fully muted.
The on/off status of the two talk channels,
or the status of the call function, does not
impact the headphone output.
Button Operation
Two pushbutton switches are associated
with the Model 371A’s two talk channels.
How they function will depend on the con-
figuration of the unit. Each button can be
configured independently.
Push to Talk
When a 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 associated Dante audio
output (transmitter) channel. The button’s