Issue 1, September 2016
Model 380 User Guide
Page 12
Studio Technologies, Inc.
(Tx) channels have default names of
Main
and
Talkback
. The two Dante re-
ceiver (Rx) channels have default names
of
Headphone Ch1
and
Headphone Ch2
.
Using Dante Controller the default device
name and channel names can be revised
as appropriate for the specific application.
Model 380 Configuration
The Model 380 provides five DIP switches
which are used to configure four operat-
ing functions. These allow the unit to be
optimized to match the needs of specific
applications. Two of the switches allow the
gain of the microphone preamplifier to be
adjusted. One switch selects how incom-
ing audio and sidetone audio are routed to
the headphone output channels. The fourth
switch selects the mode of the talkback
button. The fifth switch selects the on/off
status of the sidetone function. Physically
the switches are accessible from the back
of the Model 380’s enclosure through a
rectangular opening that is located under
the top of the belt clip.
The DIP switches are connected to the
Model 380’s logic circuitry which responds
to changes by way of the application firm-
ware; no audio passes directly through the
switches. Changes made to a DIP switch
will immediately be reflected in the unit’s
operation.
Accessing the Configuration Switches
To access the five configuration DIP switch-
es requires that the belt clip be rotated.
Normally the belt clip is secured to the
back of the enclosure using one rivet (non-
removable) and one machine screw that
has a thread pitch of 6-32. To allow the belt
clip to rotate, remove the machine screw
using a #1 Phillips head screw driver. The
belt clip should now be able to rotate in
either direction. Save the screw so that it
can be re-installed once the desired con-
figuration choices have been made. Note
that the threaded fastener within the back
of the Model 380’s chassis has an internal
locking mechanism (a plastic bushing)
that prevents the belt clip’s 6-32 machine
screw from vibrating loose. So no addi-
tional method of thread locking, such as
a lock washer or chemical compound, is
necessary.
Microphone Preamp Gain
Switches SW1 and SW2 allow the gain of
the Model 380’s microphone preamplifier
to be selected. When SW1 and SW2 are
in their down (off) position 35 dB of gain is
selected. Placing SW1 to its up (on) posi-
tion while leaving SW2 in its down (off)
position selects the 43 dB gain setting.
Leaving SW1 to its down (off) position
while placing SW2 in its up (on) position
selects the 52 dB gain setting. Placing
SW1 and SW2 to their up (on) positions
selects the gain to be 59 dB.
Figure 2. Microphone preamplifier gain
configuration switches
