Studio Technologies 5120 2014 - Manual (Page 5)

Model 5120 User Guide Issue 5, October 2014
Studio Technologies, Inc. Page 5
Model 5120
Line/IFB Output Module
Introduction
The Model 5120 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”)
and one IFB (“wet”) outputs, in an easy-to-
use yet technically sophisticated package.
(Note that IFB is an acronym for Interrupt-
ed Fold Back, an arcane broadcast tech-
nical term meaning the cue signals sent
to on-air talent or other technical support
personnel.) The module’s basic functions
include analog and digital audio inputs,
input level and status LED indicators,
two analog line-level outputs, and a 2-
channel DC-biased (“wet”) broadcast-
standard IFB output. 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 5120 include
sports broadcasting booth packages,
remote news gathering “fly-packs,” stadium
audio/video interface (I/O) locations, and
other broadcast-infrastructure projects.
The number of Model 5120 modules used
in a project can vary widely—from one to
dozens. In each case the Model 5120’s
performance will be completely “pro” with
audio quality, reliability, and installation flex-
ibility matching that of larger-scale audio
consoles, matrix intercom systems, and
stand-alone IFB systems.
Typical applications will find the Model
5120’s analog and digital audio inputs being
interfaced with outputs provided by fiber-
optic transport modules, audio/video rout-
ers, broadcast/production consoles, 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, the digital audio input
will always take precedence. Under proces-
sor control the digital audio input will always
serve as the Model 5120’s audio source
should it be present and “locked” to the in-
put circuitry. The analog audio input will be
active whenever a digital audio signal is not
present and “locked.”
The Model 5120’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
applications these two outputs may be
referred to as “dry” (no DC voltage present)
IFB signals. The Model 5120’s IFB output is
directly compatible with listen-only portable
Figure 1. Model 5120S Line/IFB Output Module front and back views