Studio Technologies 76B 2008 - Manual (Page 9)

Model 76B/77B User Guide Issue 1, July 2008
Studio Technologies, Inc. Page 9
for Surround
should provide an AC mains cord for des-
tinations outside of North America. Any
additional Model 77B Control Consoles
will be shipped in separate cartons.
Mounting the Model 76B
The Model 76B Central Controller requires
one space in a standard 19-inch (48.3 cm)
equipment rack. Select a location that is
convenient for making connections to the
digital and analog audio signals as well
as interfacing with the Model 77B Control
Console. A 20-foot (6.1-meter) cable is
supplied to connect the Model 76B to the
Model 77B. If the needs of a specifi c instal-
lation dictate, an alternate-length intercon-
necting cable can be fabricated and used.
Secure the Model 76B into the equipment
rack using two mounting screws per side.
Audio Connections
Audio signal connections are made by
way of nine BNC jacks and one 25-pin
D-subminiature connector which are locat-
ed on the Model 76B’s back panel. Refer
to Figure 2 for a detailed view of the back
panel. The BNC jacks will be used for inter-
connecting with the digital audio signals. A
cable assembly with a 25-pin D-sub plug
(male) on one end and the desired con-
nectors on the other end will be used for
connecting to the analog monitor outputs.
Digital Audio Inputs
Prior to sources being connected to the
fi ve inputs it’s worth reviewing how they
are used by the StudioComm system.
Surround inputs A and B each have six
channels (5.1) and can be confi gured
for monitoring over the surround monitor
output channels. The relationship between
input channels and output channels is
maintained, i.e., left input to left monitor
output, right input to right monitor output,
center input to center monitor output, etc.
(Of course this won’t be true in the special
case where the 5.1 to stereo downmix
function is enabled.)
Stereo inputs A and B can be confi gured
to be used as a stereo source or as two
independent monaural sources. When
confi gured as a stereo source the left
channel is routed to the left monitor output
and the right channel to the right monitor
output. Alternately, the left and right input
channels can be independently confi gured
to output by way of the monitor output’s
center channel. In this way a single digital
audio source can supply one or two mon-
aural signals to the StudioComm system
and be correctly monitored.
Stereo input C is unique in that it can serve
as a source for both the surround and the
auxiliary monitor outputs. As with the other
inputs, stereo input C can be assigned,
using the confi guration function, to an input
select button. This will allow stereo input
C to be monitored using the left and right
channels of the surround monitor output. In
addition, the signal connected to stereo in-
put C will be routed to the auxiliary output
whenever that function is active. To clarify:
if the auxiliary output is enabled (turned
on) a signal on the left channel of stereo
input C will be present on the left channel
of the auxiliary output; a signal on the right
channel of stereo input C will be present
on the auxiliary output’s right channel.
It’s important to note that there is one
limitation regarding stereo input C. Unlike
stereo inputs A and B, it can only be
used as a stereo (2-channel) source. Its
left and right channels can’t be indepen-
dently monitored over the center channel
of the surround monitor output. (The