Studio Technologies 82 - Manual (Page 9)

Model 82 User Guide Issue 1, January 2000
Studio Technologies, Inc. Page 9
System Components
The shipping carton contains a Model 82,
User Guide, and warranty card. Units
destined for North America are shipped
with an AC mains cord. Your dealer or
distributor will provide an AC mains cord
for non-North American destinations.
Mounting the Model 82
The Model 82 requires one space in a
standard 19-inch (48.3cm) equipment
rack. It is desirable to locate the Model 82
to allow easy access to both the front and
the back panels. The back panel contains
the input and output connectors. The front
panel is used to access the calibration
controls and output-level switches. The
front panel also contains four LED level
indicators. The Model 82 is secured to
the equipment rack using two mounting
screws per side.
Audio Input
The Model 82 provides one stereo line-
level input. It is electronically balanced,
and compatible with balanced or unbal-
anced signals that have a nominal level
range of –12 dBV to +6dBu. The ExactCal
section allows precise level calibration
with the connected input signal. The
configuration section of this guide pro-
vides details on using the trim pots.
It is anticipated that in most cases a stereo
signal will be connected to the input. The
Model 82 can also be used as a 1-input/
8-output monaural distribution amplifier,
or as a dual 1-input/4-output monaural
distribution amplifier.
Two 3-pin female XLR-type connectors are
used to interface with the input source.
Prepare the mating connectors (males) so
that pin 2 is signal high (+ or hot), pin 3 is
low (– or cold), and pin 1 is shield. With an
unbalanced source, connect pin 2 to high
(+ or hot), and pins 1 and 3 to shield. If
connecting to an unbalanced source in
this manner results in hum or noise, try
connecting pin 2 to high (+ or hot) and
pin 3 to shield; leave pin 1 unterminated.
Audio Outputs
The Model 82 contains four independent
stereo line-level outputs. The outputs are
electronically balanced and capable of
driving balanced or unbalanced loads of
600 ohm or greater. The outputs can be
individually configured for a nominal
output level of –10dBV or +4dBu, so you
can connect to all line-level inputs with no
hassle.
Eight 3-pin male XLR-type connectors are
used to interface with the Model 82's
outputs. Prepare the mating connectors
(females) so that pin 2 is signal high (+ or
hot), pin 3 is low (– or cold), and pin 1 is
shield. To connect to an unbalanced load
connect pin 2 as signal high (+ or hot),
and pins 1 and 3 as signal low/shield. For
optimal unbalanced operation, it is impor-
tant to connect pins 1 and 3 together
directly on the connector that mates with
the Model 82, and not on the other end
of the cable.
Note that while the Model 82’s electroni-
cally balanced output circuits are capable
of driving loads of 600 ohms or greater,
the output level will drop slightly as the
load impedance approaches 600 ohms.
A 0.5dB difference in output level can be
expected as the load impedance changes
from 10k ohms to 600 ohms.
AC Mains Power
The Model 82 is internally configured to
operate from either 100, 120, or 220/240V,