Studio Technologies 372A, User Manual

Page: 14 / 23

Issue 1, April 2019 Model 372A User Guide
Page 14 Studio Technologies, Inc.
MODEL 372A
INTERCOM BELTPACK
Ethernet and Dante Status
LEDs
Three status LEDs are located below the
etherCON RJ45 receptacle on the Model
372A’s bottom panel. The LINK ACT LED
will light green whenever an active connec-
tion to a 100 Mb/s Ethernet network has
been established. It will flash in response to
Ethernet data packet activity. The SYS and
SYNC LEDs display the operating status of
the Dante interface and associated network.
The SYS LED will light red upon Model 372A
power up to indicate that the Dante inter-
face 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 372A is
not synchronized with a Dante network. It
will light solid green when the Model 372A
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 372A is serving as
the clock master for the network. It’s pos-
sible 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 A con-
nector. Labeled COMP, the LED displays the
status of the microphone preamplifier com-
pressor 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 acceptable for this
LED to light intermittently whenever a user
is talking at a normal voice level into the
connected microphone. 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 beneficial. Note that due to the design of
the circuitry the compressor active LED will
function whether or not the talk channel is
active.
Headphone Output
Two rotary potentiometers (“pots”), located
on the Model 372A’s top panel, allow in-
dividual adjustment of the level of the two
audio input signals as they are sent to the
2-channel headphone output. Depending
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 chan-
nels 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 protection from an unwanted
change is desired.
Users should find the headphone output
audio quality to be excellent, with high maxi-
mum 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 372A’s processor which then
adjusts the signal level within the digital
domain. When a pot is in its fully counter-
clockwise position the associated audio
signal is fully muted. The on/off status of the
talk channel does not impact the headphone
output.
Button Operation
A pushbutton switch is associated with the
Model 372A’s talk channel. How the switch
functions will depend on the configuration of
the unit.