User Guide

Model฀74/75฀User฀Guide฀ Issue฀3,฀November฀2016฀
Studio฀Technologies,฀Inc.฀ Page฀21
for Surround
Setting฀the฀reference฀level฀is฀very฀simple:
1.฀ Set฀up฀a฀precision฀sound฀pressure฀
level฀(SPL)฀measuring฀device฀at฀the฀
desired฀listening฀location.
2.฀ Place฀the฀StudioComm฀system฀in฀the฀
normal฀operating฀mode,฀not฀the฀con-
figuration฀mode.฀Be฀certain฀that฀the฀
reference฀and฀dim฀functions฀are฀not฀฀
active.
3.฀ Use฀the฀Model฀75฀Control฀Console฀to฀
select฀the฀input฀source฀that฀contains฀
the฀desired฀reference฀signal฀source,฀
e.g.,฀pink฀noise.
4.฀ Select฀the฀desired฀monitor฀output,฀
speaker฀system฀A฀or฀B.
5.฀ Observing฀the฀SPL฀meter,฀adjust฀the฀
Model฀75’s฀rotary฀level฀control฀until฀
the฀desired฀reference฀output฀level฀has฀
been฀reached.
6.฀ Being฀careful฀not฀to฀touch฀the฀position฀
of฀the฀rotary฀level฀control,฀enter฀the฀
configuration฀mode฀by฀pressing฀and฀
holding฀the฀configuration฀button฀locat-
ed฀on฀the฀Model฀75’s฀back฀panel.
7.฀ Once฀the฀configuration฀mode฀has฀been฀
entered,฀the฀monitor฀outputs฀will฀mute.฀
Press฀and฀hold฀the฀reference฀button฀
until฀its฀associated฀LED฀lights.฀This฀will฀
take฀approximately฀five฀seconds.฀The฀
LED฀will฀light฀to฀indicate฀that฀a฀“snap-
shot”฀of฀the฀new฀reference฀level฀has฀
been฀taken.
8.฀ To฀store฀the฀new฀reference฀level฀in฀
memory,฀exit฀the฀configuration฀mode฀by฀
again฀pressing฀and฀holding฀the฀config-
ure฀button.
This฀level฀is฀now฀permanently฀stored฀as฀
the฀reference฀level.฀Only฀by฀repeating฀the฀
procedure฀can฀the฀value฀be฀changed.
Once฀the฀configuration฀mode฀has฀been฀
exited,฀the฀monitor฀output฀channels฀will฀
again฀become฀active.฀Confirm฀that฀the฀cor-
rect฀level฀has฀been฀stored฀by฀pressing฀the฀
reference฀button.฀The฀SPL฀meter฀should฀
again฀display฀the฀desired฀level.฀If฀not,฀฀
repeat฀the฀calibration฀procedure.
You฀might฀wonder฀why฀you฀have฀to฀press฀
and฀hold฀the฀reference฀button฀for฀five฀sec-
onds฀before฀the฀selected฀value฀is฀stored.฀
This฀is฀provided฀specifically฀so฀that฀some฀
careless฀person฀won’t฀accidentally฀change฀
the฀reference฀level฀while฀they฀are฀“playing฀
around”฀in฀the฀configuration฀mode!฀Only฀if฀
you฀know฀the฀“secret”฀will฀you฀be฀able฀to฀
store฀a฀new฀value.
Remote฀Input฀Select
The฀remote฀input฀select฀function฀requires฀
configuring฀two฀parameters:฀mode฀and฀
input฀to฀be฀selected.฀The฀mode฀can฀be฀
selected฀from฀three฀choices:฀disabled,฀
exclusive,฀and฀non-exclusive.฀As฀expected,฀
when฀configured฀for฀disabled,฀the฀function฀
cannot฀be฀activated.฀When฀configured฀for฀
exclusive,฀whenever฀the฀function฀is฀acti-
vated฀only฀the฀specified฀input฀will฀be฀active.฀
When฀configured฀for฀non-exclusive,฀when-
ever฀the฀function฀is฀activated฀the฀specified฀
input฀will฀be฀added฀(summed)฀with฀any฀
other฀input฀or฀inputs฀that฀are฀already฀ac-
tive.฀The฀input฀can฀be฀selected฀from฀among฀
the฀two฀surround฀and฀two฀stereo฀input฀
sources.
Dim฀Level
The฀dim฀function฀is฀used฀to฀reduce฀the฀
monitor฀output฀level฀by฀a฀preset฀amount.฀
The฀reduction฀is฀in฀dB฀relative฀to฀the฀moni-
tor฀output’s฀current฀level.฀There฀are฀four฀
dim฀level฀values฀available:฀10,฀15,฀20,฀฀
and฀25฀dB.