Studio Technologies 74 - Manual (Page 4)

Model 74/75 User Guide Issue 2, January 2006
Studio Technologies, Inc. Page 5
for Surround
Introduction
What This User Guide Covers
This User Guide is designed to assist you
when installing and using the Model 74
Central Controller and the Model 75
Control Console.
StudioComm for Surround
The StudioComm for Surround Model 74
Central Controller and Model 75 Control
Console work together to provide 5.1
surround and stereo source monitoring
capabilities, along with a full-featured
headphone “talkback” cue system. The
system is a perfect fi t for contemporary
facilities that need to perform a variety of
audio tasks. These can include surround
and stereo mixing and monitoring, live re-
cording of voice, music, and sound effects,
and on-air broadcast applications. The
system’s features were carefully selected
to provide extensive capabilities while
remaining simple to operate. Of overriding
concern is maintaining the quality of the
connected audio sources. This is accom-
plished using a combination of excellent
circuit design and carefully selected com-
ponents. The Model 74/Model 75 combina-
tion is ideal for adding surround monitoring
capability to disk-based recording systems.
It’s also well suited for upgrading a post-
production or broadcast facility to support
multi-channel monitoring.
A complete StudioComm for Surround
74/75 system begins with the Model 75
Control Console, a compact user control
surface that is intuitive and comfortable to
use. It is designed to reside at the oper-
ator’s location. The Model 75 connects
to the Model 74 Central Controller using
a single 9-pin cable. Occupying one rack
space, the Model 74 provides all audio
input and output circuitry, signal routing
and control, and power supply functions.
To complete the system up to four Model
35 Talent Amplifi er modules can be added.
These connect to the Model 74 using stan-
dard 3-pin XLR-type audio cables. Model
35 units are typically deployed in voice-
over booths, studio areas, or other loca-
tions where voice or music talent needs
access to a headphone cue feed. Each
unit provides a stereo audio amplifi er, user
controls, and support for one or two pairs
of headphones.
Model 74 Central Controller
The Model 74 Central Controller is a
single rack-space unit that contains ana-
log, digital, and power supply electronics.
Four analog sources can be connected:
two surround (5.1) and two stereo. In
many applications the fi rst surround input,
Surround A, will be connected to a multi-
channel output on an audio console or
digital audio workstation. The second sur-
round input, Surround B, will be connected
to a playback device, such as a multitrack
tape recorder or disk storage system. For
fi lm or video post applications Surround
A would be considered the direct source,
while Surround B would be considered
the playback source.
The two stereo inputs, Stereo A and
Stereo B, are provided for general-purpose
use and can be connected to a variety
of 2-channel direct and playback sources.
For fl exibility, the surround and stereo
inputs are compatible with balanced or
unbalanced signals having a nominal level
range of –12 dBV to +6 dBu. Fifteen-turn
trim potentiometers are used to precisely
calibrate the input signals.