Studio Technologies 2A 2015 - Manual (Page 12)

Issue 2, March 2015 Model 2A User Guide
Page 12 Studio Technologies, Inc.
The Model 33A is unique in that a “mix” of
IFB channels 1 and 2 can be created. Two
level controls, along with a source selection
switch, allows camera and production per-
sonnel to hear IFB cues from either or both
channels. This allows IFB signals intended
for both production personnel and on-air
talent to be simultaneously monitored.
Installation
In this section you will be installing a Model
2A Central Controller in a standard 19-inch
equipment rack. In conjunction with the
Model 2A, up to four Model 22 or Model 24
Access Stations can be installed. In addi-
tion, wiring can be installed for up to a total
of six associated Model 32A and Model
33A Talent Amplifiers.
The Model 2A will arrive from the factory
configured for compatibility with most appli-
cations. However, there are several reasons
why you may need to access the “guts” of
the unit:
• From the factory, telephone interface 2
is typically configured to automatically
answer the telephone line after detect-
ing one ring. Switches can be config-
ured to allow auto-answer to take place
after one ring, two rings, four rings, or
be disabled (never auto answer).
• From the factory, the Model 2A is set to
mute program audio when an interrupt
takes place. If desired, a program “dim”
function, rather than mute function, can
be implemented.
Refer to the Configuration section of this
guide for details on revising these condi-
tions and the safety precautions that must
be observed.
In addition to these situations, you may
want to take a look inside and familiarize
yourself with the unit on the rare occasion
that it may need service. (The people here
in the marketing department taught us
never to say a unit may need to be fixed—
service is much nicer!) We are proud of
how the “guts” of the Model 2A look and
how it is constructed so we encourage you
to take a “peek”!
On a more serious side, removing the
Model 2A’s cover with the AC mains cord
connected exposes you to hazardous
voltages.
Warning: Never remove the cover
without disconnecting mains power. We
make the assumption that anyone gain-
ing access to the inside of our products
meets the requirements for “qualified
and competent service personnel”—
including having knowledge of safety
precautions.
Locating the Unit
Physical access and mechanical noise
are the primary factors when choosing
a Model 2A mounting location. You don’t
want a cooling fan blowing directly onto
the internal microphone, nor do you want
the microphone at the level of your belt. It
is also a good idea to keep the Model 2A
physically separated from other electronic
devices that produce strong electrical
fields. As a device that contains high gain
audio stages, hum and noise pickup is
possible through the chassis and associ-
ated cabling. Locating the unit away from
devices such as power amplifiers, large
power transformers, and lighting controls
will help avoid pickup of unwanted signals.