Studio Technologies 5121 - Manual (Page 5)

Model 5121 User Guide Issue 3, October 2014
Studio Technologies, Inc. Page 5
Model 5121
Line/IFB Output Module
Introduction
The Model 5121 Line/IFB Output Module is
a compact, self-contained 2-channel mod-
ule intended for use in custom broadcast,
live-performance, and other specialized
audio applications. The module provides
broadcast and production talent cueing
interfaces, specifically two line-level “dry”
outputs and one powered “wet” IFB output,
in an easy-to-use yet technically sophisti-
cated package. (Note that IFB is an acro-
nym for Interrupted Fold Back, an arcane
broadcast technical term meaning the cue
signals sent to on-air talent or other techni-
cal support personnel.) The module’s basic
functions include analog and digital audio
inputs, input level and status LED indica-
tors, two analog line-level outputs, and a
2-channel powered “wet” broadcast-stan-
dard IFB output. Remote monitoring and
control capability is included to support
advanced applications. Module operation
requires only a source of analog or digital
audio, along with an externally-provided
source of 12 volts DC.
Applications for the Model 5121 include
sports broadcasting booth packages, re-
mote news gathering “fly-packs,” stadium
audio/video interface (I/O) locations, and
other broadcast-infrastructure projects. The
number of Model 5121 modules used in
a project can vary widely—from one to doz-
ens. In each case the Model 5121’s perfor-
mance will be completely “pro” with audio
quality, reliability, and installation flexibility
matching that of larger-scale audio con-
soles, matrix intercom systems, and stand-
alone IFB systems.
Typical applications will find either or both
of the Model 5121’s analog or digital audio
inputs being interfaced with outputs provid-
ed by fiber-optic transport modules, audio/
video routers, broadcast/production con-
soles, and matrix intercom systems. Only
one of the audio inputs, analog or digital,
will be used at any one time. No mixing
of the signals will take place. While both
physical inputs can be connected, by de-
fault the digital audio input will always take
precedence. In the automatic selection
mode the digital audio input will serve as
the Model 5121’s audio source should it be
present and “locked” to the input circuitry.
The analog audio input will be active when-
ever a digital audio signal is not present and
“locked.”
The Model 5121’s line-level outputs would
typically be connected to battery-powered
listen-only headphone amplifiers, ampli-
fied speakers, or inputs on broadcast me-
dia storage systems. In remote-broadcast
Figure 1. Model 5121S Line/IFB Output Module Front and Back Views