Studio Technologies 742 2005 - Manual (Page 11)

Model 742 User Guide Issue 2, May 2005
Studio Technologies, Inc. Page 11
Model 742
Mounting
The Model 742 is intended for mounting in
a standard 19-inch equipment rack, requir-
ing 1.75 vertical inches (one standard rack
space). It weighs 8.7 pounds (4.0 kg) and
operates on mains power of 100, 120, or
220/240 volts, 50/60 Hz. The maximum
current draw is less than 0.2 amperes. Four
mounting screws, two per side, are used to
secure the unit into the equipment rack.
Connections
The Model 742’s audio connections are
made using 3-pin male and female XLR-type
connectors as well as ¼-inch 3-conductor
phone jacks. AC mains power is connected
by means of a detachable cord set that is
compatible with the unit’s 3-pin IEC 320
C14-compatible inlet connector.
Mic/Line Inputs
The Model 742 contains four input chan-
nels that are compatible with microphone
and line-level sources. Each input uses a
3-pin female XLR-type connector. 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.
It’s possible that some of the mic/line
inputs will be wired to an input/output
(I/O) panel located on the side or rear of
a broadcast vehicle. If this is the case, it’s
also nice to have one or two of the inputs
“multed” to connectors inside the vehicle.
This will allow the rapid connection of
microphone or line-level signals during
specialized situations. For example, during
inclement weather on-air talent may wish
to connect a microphone to the Model 742
from inside a vehicle.
To minimize potential hum or noise prob-
lems, it is recommended that microphone-
level signals connected to the mic/line
inputs not be wired by way of points on an
audio patch bay. It certainly can be done,
but the possibility for intermittent connec-
tions, especially in mobile applications,
may significantly increase.
Line Inputs
The Model 742 contains four line-level
input channels. Each input uses a 3-pin
female XLR-type connector. 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. Unbalanced
Detail of back panel showing mic/line input connectors