Studio Technologies 40 - Manual (Page 8)

Model 40 User Guide Issue 1, July 1994
Studio Technologies, Inc. Page 9
Installation
In this section you will be installing the
Model 40 Central Controller in an equip-
ment rack. Audio input connections will be
made. Wiring will be installed to allow
Model 35 or Model 38 Talent Amplifiers to
be connected. AC mains power will be
connected to the Model 40.
System Components
The main StudioComm shipping carton
contains a Model 40 Central Controller,
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.
Model 35 and Model 38 Talent Amplifiers
will be contained in separate cartons.
Please check to ensure you have every-
thing you need.
Sample Installation
Please refer to the following page for a
diagram detailing a possible Model 40 and
talent amplifier installation.
Mounting the Model 40
The Model 40 requires one space in a
standard 19-inch (48.3cm) equipment
rack. It is desirable to locate the Model 40
to allow easy access to both the front and
the back panels. The back panel contains
the input and output connectors, while the
front panel contains several controls,
switches, and LED indicators. The Model
40 is secured to the equipment rack using
two mounting screws per side.
Audio Inputs
The Model 40’s line-level audio input
connections are made using ¼-inch
3-conductor phone jacks. Don’t be con-
cerned about damage to your audio quality,
the jacks we use are manufactured by
Neutrik of Switzerland and feature gold-
plated contacts for excellent performance.
Caution: For reliable audio interconnection,
the plugs you use must comply with industry
standard RS-453. Switchcraft No. 297,
Neutrik NP3C, or equivalent will work cor-
rectly. Refer to the Technical Notes section
for details.
Stereo Line Inputs
The Model 40 allows two stereo line input
sources to be connected. During operation
either talent amplifier output group can
select either of the stereo inputs as its
source. This allows flexibility in routing the
desired source to the desired group of
talent amplifiers. In some installations only
one stereo source may be available. In this
case the one stereo source should be
connected to input 1. For future use it may
be wise to connect input 2 to points on a
patch bay. This will allow rapid connection
of another audio source should the need
arise.
The input circuitry is electronically balanced,
and is compatible with balanced or unbal-
anced signals that have a nominal level
range of –10dBV to +10dBu. The input
impedance is 50K ohms so that compatibil-
ity with virtually every source is assured.
Prepare the input plugs so that tip is posi-
tive (+ or hot), ring is negative (– or cold),
and sleeve is shield. The input jacks will
also accept unbalanced ¼-inch 2-conductor
phone plugs. With unbalanced phone plugs,
tip is positive (+ or hot) and sleeve is shield.
If 3-conductor phone plugs are used to
connect unbalanced input signals, connect
positive (+ or hot) to tip and shield to ring
and sleeve.