Manual

Issue 2, August 2019 Model 370A User Guide
Page 14 Studio Technologies, Inc.
MODEL 370A
INTERCOM BELTPACK
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”), locat-
ed on the Model 370A’s top panel, allow
individual adjustment of the level of the
two audio input signals as they are sent to
the 2-channel headphone output. Depend-
ing on the configuration of the unit, each
audio input can be sent to the left channel,
the right channel, or both the left and right
channels of the headphone output. 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 protec-
tion 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 370A’s processor
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 sta-
tus 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 370A’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 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 a 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 ac-
tive the green LED will light. The button will
not be lit when the function is not active.
Push to Talk/Tap to Latch
If a button has been configured for the
Push to Talk/Tap to Latch
mode operation
is a bit different and certainly more flex-
ible. Press and hold the button to activate