User Guide

Model฀74/75฀User฀Guide฀ Issue฀3,฀November฀2016฀
Studio฀Technologies,฀Inc.฀ Page฀5
for Surround
Introduction
What฀This฀User฀Guide฀Covers
This฀User฀Guide฀is฀designed฀to฀assist฀you฀
when฀installing฀and฀using฀the฀Model฀74฀
Central฀Controller฀and฀the฀Model฀75฀฀
Control฀Console.฀
StudioComm฀for฀Surround
The฀StudioComm฀for฀Surround฀Model฀74฀
Central฀Controller฀and฀Model฀75฀Control฀
Console฀work฀together฀to฀provide฀5.1฀
surround฀and฀stereo฀source฀monitor-
ing฀capabilities,฀along฀with฀a฀full-featured฀
headphone฀“talkback”฀cue฀system.฀The฀
system฀is฀a฀perfect฀fit฀for฀contemporary฀fa-
cilities฀that฀need฀to฀perform฀a฀variety฀of฀au-
dio฀tasks.฀These฀can฀include฀surround฀and฀
stereo฀mixing฀and฀monitoring,฀live฀record-
ing฀of฀voice,฀music,฀and฀sound฀effects,฀and฀
on-air฀broadcast฀applications.฀The฀system’s฀
features฀were฀carefully฀selected฀to฀pro-
vide฀extensive฀capabilities฀while฀remaining฀
simple฀to฀operate.฀Of฀overriding฀concern฀
is฀maintaining฀the฀quality฀of฀the฀connected฀
audio฀sources.฀This฀is฀accomplished฀using฀
a฀combination฀of฀excellent฀circuit฀design฀
and฀carefully฀selected฀components.฀The฀
Model฀74/Model฀75฀combination฀is฀ideal฀for฀
adding฀surround฀monitoring฀capability฀to฀
disk-based฀recording฀systems.฀It’s฀also฀well฀
suited฀for฀upgrading฀a฀post-production฀or฀
broadcast฀facility฀to฀support฀multi-channel฀
monitoring.
A฀complete฀StudioComm฀for฀Surround฀
74/75฀system฀begins฀with฀the฀Model฀75฀
Control฀Console,฀a฀compact฀user฀control฀
surface฀that฀is฀intuitive฀and฀comfortable฀
to฀use.฀It฀is฀designed฀to฀reside฀at฀the฀op-
erator’s฀location.฀The฀Model฀75฀connects฀
to฀the฀Model฀74฀Central฀Controller฀using฀
a฀single฀9-pin฀cable.฀Occupying฀one฀rack฀
space,฀the฀Model฀74฀provides฀all฀audio฀
input฀and฀output฀circuitry,฀signal฀routing฀
and฀control,฀and฀power฀supply฀functions.฀
To฀complete฀the฀system฀up฀to฀four฀Model฀
35฀Talent฀Amplifier฀modules฀can฀be฀added.฀
These฀connect฀to฀the฀Model฀74฀using฀
standard฀3-pin฀XLR฀audio฀cables.฀Model฀
35฀units฀are฀typically฀deployed฀in฀voice-
over฀booths,฀studio฀areas,฀or฀other฀loca-
tions฀where฀voice฀or฀music฀talent฀needs฀
access฀to฀a฀headphone฀cue฀feed.฀Each฀
unit฀provides฀a฀stereo฀audio฀amplifier,฀user฀
controls,฀and฀support฀for฀one฀or฀two฀pairs฀
of฀headphones.
Model฀74฀Central฀Controller
The฀Model฀74฀Central฀Controller฀is฀a฀฀
single฀rack-space฀(1U)฀unit฀that฀contains฀
analog,฀digital,฀and฀power฀supply฀electron-
ics.฀Four฀analog฀sources฀can฀be฀connect-
ed:฀two฀surround฀(5.1)฀and฀two฀stereo.฀In฀฀
many฀applications฀the฀first฀surround฀input,฀
Surround฀A,฀will฀be฀connected฀to฀a฀multi-
channel฀output฀on฀an฀audio฀console฀or฀
digital฀audio฀workstation.฀The฀second฀sur-
round฀input,฀Surround฀B,฀will฀be฀connected฀
to฀a฀playback฀device฀such฀as฀a฀disk฀stor-
age฀system.฀For฀film฀or฀video฀post฀applica-
tions฀Surround฀A฀would฀be฀considered฀the฀
direct฀source,฀while฀Surround฀B฀would฀be฀
considered฀the฀playback฀source.
The฀two฀stereo฀inputs,฀Stereo฀A฀and฀฀
Stereo฀B,฀are฀provided฀for฀general-purpose฀
use฀and฀can฀be฀connected฀to฀a฀variety฀฀
of฀2-channel฀direct฀and฀playback฀sources.฀
For฀flexibility,฀the฀surround฀and฀stereo฀
inputs฀are฀compatible฀with฀balanced฀or฀
unbalanced฀signals฀having฀a฀nominal฀level฀
range฀of฀–12฀dBV฀to฀+6฀dBu.฀Fifteen-turn฀
trim฀potentiometers฀are฀used฀to฀precisely฀
calibrate฀the฀input฀signals.