Studio Technologies 76DBA V.3.00 - Manual (Page 13)

Model 76DBA/77B User Guide Issue 1, November 2010
Studio Technologies, Inc. Page 13
for Surround
design standard for D-subminiature
connectors.
Pre-Fader Surround Digital Monitor
Output
The pre-fader surround digital monitor
output channels are intended to connect
to metering, measurement, or other signal
monitoring equipment that requires un-
interrupted, full-level digital audio signal
sources.
Stereo Input C Direct Digital Monitor
Output
The stereo input C direct digital monitor
output is intended for use in site-specific
applications. It provides an uninterrupted,
full-level digital audio signal source that
is post-SRC and input delay in the signal
chain.
Post-Fader Surround Digital Monitor
Output
The post-fader surround digital monitor
output channels are designed for connec-
tion to digital inputs on audio amplifiers
associated with monitor loudspeakers.
Alternately, they could be connected to the
inputs of loudspeakers that contain inte-
grated amplifiers with digital audio input
capability.
Auxiliary Stereo Digital Monitor Output
The auxiliary stereo digital monitor
output channels are intended to support
a stereo loudspeaker system, either by
connecting to the digital input of an ampli-
fier associated with a set of loudspeakers
or directly to a set of amplified speakers
that provide digital inputs. In either case
a user level control must be provided. The
StudioComm system is not, by design,
able to control the level of the auxiliary
stereo digital monitor output.
Analog Monitor Outputs
The connector labeled Analog Monitor
Outputs provides access to the Model
76DBA’s 6-channel (5.1) post-fader
surround and 2-channel auxiliary stereo
monitor outputs. The post-fader surround
analog monitor output channels are intend-
ed to connect to analog inputs associated
with the surround loudspeaker system in-
corporated in a facility. The auxiliary stereo
analog monitor output allows support for
a secondary set of stereo monitor loud-
speakers. The StudioComm system is not,
by design, able to control the level of the
auxiliary stereo analog monitor output. As
such, the loudspeaker system must con-
tain a means of adjusting its output level.
The analog monitor output channels are
designed for connection to audio amplifiers
associated with monitor loudspeakers or
to the inputs of loudspeakers that contain
integrated amplifiers. The analog monitor
outputs are electronically balanced and
will perform optimally when driving loads
of 2000 (2 k) ohms or greater. In most
applications 3-pin XLR plugs (male) will
be used to interface with the inputs on the
associated amplifiers or amplified speak-
ers. In this case the + terminal would go to
pin 2 of the XLR, the – terminal to XLR
pin 3, and the shield terminal to XLR pin 1.
Balanced operation of the analog monitor
outputs is the preferred connection method
but unbalanced operation does not pose a
problem. To connect to an unbalanced load
connect the + terminal as signal high, and
only the Model 76DBA’s shield terminal as
the signal low/shield. Leave the – terminal
unconnected. For correct unbalanced
operation, it is important not to connect
– and shield together.