Studio Technologies 82 - Manual (Page 7)

Model 82 User Guide Issue 1, January 2000
Studio Technologies, Inc. Page 7
Introduction
The Model 82 Stereo Analog Audio
Distribution Amplifier was developed by
Studio Technologies as part of its Studio
Tools group of audio support products.
The Model 82 is designed to work in a
large variety of applications. Specific
applications include audio production,
duplication, broadcast, and sound rein-
forcement. All Model 82 functions meet
or exceed the performance of the most
expensive “high end” audio equipment.
What This User Guide Covers
This User Guide is designed to assist you
when installing, configuring, and using the
Model 82 Stereo Analog Audio Distribution
Amplifier.
System Overview
The Model 82 from Studio Technologies,
Inc. is a distribution amplifier that truly
meets the needs of the real world. The
stereo input is intended to connect to
virtually any line-level audio source.
The ExactCal input calibration section
allows optimal audio performance to be
achieved over a nominal input level range
of –12dBV to +6dBu. The four stereo
outputs meet exacting professional stan-
dards. Capable of driving balanced or
unbalanced loads, each output can drive
+26dBu into 600 ohms. Using front panel
switches, each stereo output can be
individually configured for a nominal
output level of –10dBV or +4dBu.
The front-panel trim potentiometers and
LEDs make calibration and use simple.
The AC mains input power is factory
configured for 100, 120 or 220/240V,
50/60Hz operation. Components and
construction standards make the Model
82 suitable for continuous operation, even
for on-air broadcast applications.
System Features
One Stereo Input
The differential input circuitry is compat-
ible with balanced or unbalanced signals
having a nominal level range of –12dBV to
+6dBu. Using laser-trimmed components,
the stereo input offers superior common-
mode signal rejection. To achieve optimal
audio performance the ExactCal calibra-
tion section matches the installation-
specific nominal input level with the Model
82’s internal gain structure. Two 15-turn
trim potentiometers and four LEDs allow
fast, precise calibration. Unlike other
distribution amplifiers, the Model 82 en-
sures that excellent audio performance
can be achieved with little or no hassle.
Four Stereo Outputs
The Model 82 contains four independent
stereo output sections. For compatibility
with a range of facilities, each output
section can be separately configured for
a –10dBV or +4dBu nominal output level.
Each output features an electronically
balanced circuit capable of driving bal-
anced or unbalanced loads. And, unlike
some output circuits, operating a Model
82 output in an unbalanced configuration
does not cause a change in the nominal
output level. Short circuit resistant, the
rugged output circuits can drive full signal
levels into 600 ohm or greater loads.
The Model 82’s architecture precludes the
need for individual output-level trim poten-
tiometers. With the input signal calibrated
using the ExactCal section, the four stereo
outputs use 1%-tolerance components