User Guide

Issue฀3,฀November฀2016฀ Model฀74/75฀User฀Guide฀
Page฀8฀ Studio฀Technologies,฀Inc.฀
for Surround
position.฀This฀is฀useful฀in฀applications฀such฀
as฀on-air฀broadcast.฀By฀using฀the฀reference฀
level฀function,฀the฀monitor฀output฀level฀can฀
be฀set฀to฀a฀pre-configured฀value.฀This฀is฀
provided฀for฀audio-with-picture฀applications฀
that฀require฀a฀specific฀monitor฀level.฀The฀
reference฀level฀is฀easily฀configured฀by฀tak-
ing฀an฀electronic฀“snapshot”฀of฀the฀position฀
of฀the฀rotary฀level฀control.
One฀button฀controls฀which฀monitor฀output,฀
A฀or฀B,฀is฀active.฀For฀operator฀convenience,฀
the฀dim฀function฀allows฀the฀monitor฀output฀
level฀to฀be฀reduced฀by฀a฀fixed฀dB฀amount.฀
The฀dim฀level฀is฀configured฀from฀four฀avail-
able฀levels.฀A฀mute฀all฀function฀allows฀฀
all฀of฀the฀monitor฀output฀channels฀to฀be฀
simultaneously฀muted.฀The฀mute/solo฀sec-
tion฀provides฀individual฀channel฀control.฀
One฀pushbutton฀switch฀sets฀the฀operating฀
mode฀for฀either฀mute฀or฀solo.฀In฀the฀mute฀
mode,฀individual฀channels฀can฀be฀muted฀
as฀required.฀In฀the฀solo฀mode,฀one฀chan-
nel฀can฀be฀monitored฀while฀the฀others฀are฀
automatically฀muted.฀Depending฀on฀the฀
configuration,฀multiple฀channels฀can฀be฀
simultaneously฀selected฀for฀“soloing.”฀The฀
flexibility฀of฀having฀both฀mute฀and฀solo฀
available฀allows฀an฀operator฀to฀quickly฀
select฀the฀most฀comfortable฀and฀productive฀
operating฀mode.
Two฀functions฀allow฀the฀format฀of฀the฀
monitored฀sources฀to฀be฀checked฀for฀
level฀or฀phase฀inconsistencies.฀The฀5.1฀
to฀stereo฀downmix฀function฀is฀used฀to฀
create฀a฀stereo฀signal฀from฀a฀5.1฀(sur-
round)฀source.฀The฀stereo฀to฀mono฀down-
mix฀function฀allows฀a฀stereo฀signal฀to฀be฀
added฀(summed)฀and฀monitored.฀The฀two฀
downmix฀functions฀can฀be฀simultaneously฀
enabled,฀allowing฀a฀surround฀signal฀to฀be฀
checked฀for฀mono฀compatibility.฀The฀oper-
ating฀mode฀of฀the฀stereo฀to฀mono฀downmix฀
function฀can฀be฀selected฀from฀two฀choices:฀
mono-to-left-and-right฀or฀mono-to-center.฀
This฀allows฀support฀for฀both฀music฀and฀
audio-with-picture฀applications.฀A฀bandpass฀
filter฀feature฀is฀associated฀with฀the฀stereo฀to฀
mono฀downmix฀function.฀It฀is฀included฀to฀as-
sist฀an฀operator฀in฀determining฀compatibility฀
with฀“real฀world”฀playback฀environments.฀
A฀bandpass฀filter฀can฀be฀inserted฀into฀the฀
path฀of฀the฀mono฀signal,฀allowing฀฀
the฀response฀of฀a฀monaural฀loudspeaker฀
associated฀with฀an฀inexpensive฀television฀or฀
portable฀radio฀to฀be฀simulated.
To฀support฀the฀headphone฀cue฀system฀
functions฀the฀Model฀75฀Control฀Console฀
includes฀three฀pushbutton฀switches฀and฀฀
an฀integral฀microphone.฀As฀expected,฀one฀
button฀is฀used฀to฀enable฀the฀talkback฀func-
tion.฀The฀other฀two฀buttons฀are฀used฀to฀set฀
the฀talkback฀level฀over฀an฀8-step฀range.฀
These฀buttons฀are฀also฀used฀to฀select฀
which฀audio฀source฀is฀routed฀to฀the฀head-
phones.฀Two฀choices฀are฀provided:฀the฀left฀
and฀right฀channels฀of฀the฀source฀selected฀
for฀monitoring,฀or฀the฀left฀and฀right฀channels฀
associated฀with฀Stereo฀input฀B.
In฀many฀cases฀the฀talkback฀button฀con-
tained฀in฀the฀Model฀75฀will฀be฀used฀to฀initi-
ate฀the฀talkback฀function.฀However,฀some฀
applications฀may฀benefit฀from฀being฀able฀
to฀remotely฀activate฀talkback.฀A฀hard-wired฀
signal฀can฀be฀connected฀to฀the฀remote฀฀
talkback฀input.฀In฀this฀way฀various฀types฀
of฀external฀wired฀and฀wireless฀equipment฀
can฀be฀interfaced.฀An฀infrared฀(IR)฀receiver฀
module฀can฀also฀be฀directly฀connected.฀
This฀allows฀the฀use฀of฀a฀wireless฀transmitter฀
to฀enable฀talkback.฀The฀microphone฀con-
tained฀within฀the฀Model฀75฀Control฀Console฀
provides฀crisp,฀clear฀talkback฀audio.฀But฀
some฀installations฀may฀benefit฀from฀using฀
an฀alternate฀source฀of฀talkback฀audio.฀This฀
capability฀is฀provided฀by฀the฀Model฀74’s฀
line-level฀talkback฀audio฀input.