Studio Technologies IFB Plus 2007 - Manual (Page 10)

Issue 9, January 2006 Model 2 User Guide
Page 10 Studio Technologies, Inc.
controls, along with a source select switch,
allows camera and production personnel to
hear IFB cues from either or both channels.
This allows IFB signals intended for both
technician and talent to be simultaneously
monitored.
Installation
In this section you will be installing a Model
2 Central Controller in an equipment rack.
In conjunction with the Model 2, up to four
Model 22 or Model 24 Access Stations
can be installed. In addition, wiring can be
installed for up to four Model 32A and Model
33 Talent Amplifiers.
Internally, the Model 2 has no configuration
switches or trim pots to set. However, there
are several reasons why you may need to
access the “guts” of the unit:
• The factory-selected AC mains voltage
will be either 120 or 220/240 V, depend-
ing on the shipping destination. It may
need to be revised for your installation.
• From the factory, the Model 2 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 Technical Notes section for
details on revising these conditions.
In addition to the above 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 2 look and how it is
constructed so we encourage you to take a
“peek”!
On a more serious side, removing the Model
2’s cover with the AC mains cord connected
exposes you to hazardous voltages.
Warning: Never remove the cover with-
out disconnecting mains power. We
make the assumption that anyone gain-
ing access to the inside of our products
meets the requirements for “qualified ser-
vice personnel”—including knowledge of
safety precautions.
Locating the Unit
Physical access and mechanical noise are
the primary factors when choosing a mount-
ing location. You don’t want a cooling fan
blowing directly onto the internal micro-
phone, nor do you want the microphone at
the level of your navel. It is also a good idea
to keep the Model 2 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 chas-
sis and associated cabling. Locating the unit
away from devices such as power amplifi-
ers, power transformers, and lighting con-
trols will help to avoid pickup of unwanted
signals. Precautions were taken to limit the
Model 2’s bandwidth, minimizing the chance
for RF pickup problems.
Mounting
The Model 2 is intended for rack mount-
ing, requiring one 1.75-inch rack space. It
weighs a bit over 10 pounds (4.7 kg), and
operates on either 120 or 220/240 V, 50/60
Hz. The unit is secured to the front mount-
ing rails of an equipment rack using two
mounting screws per side. In addition to the
front mounting “ears,” we encourage you to
secure the Model 2 from the back. Provision