User Guide

Issue 4, December 2020 Model 780-01/790 User Guide
Page 6 Studio Technologies, Inc.
for Surround
Figure 1. Model 780-01 Central Controller Front Panel
Figure 2. Model 780-01 Central Controller Back Panel
Sync status
LED
Control console
status LED
Sync
input
Digital
monitor outputs
To/from
Models 790 &
71 Control
Consoles
AC mains
Remote control inputs
Digital surround (7.1)
inputs A & B
Stereo
input
delays (latency) associated with associ-
ated video displays up to 340 milliseconds
of input delay can be selected. For flex-
ibility, two delay values can be configured,
allowing real-time selection as desired. A
number of different signals can serve as
the Model 780-01’s digital audio timing
reference. For synchronization with a mas-
ter timing reference a dedicated source of
word clock, DARS (AES11), bi-level video,
or tri-level video can be connected. Alter-
nately, the L/R connection of the actively
selected surround or stereo input source
can serve as the timing reference.
Two surround (7.1) digital monitor outputs
are provided. The pre-fader monitor output
can be used with metering systems that
require signals that aren’t impacted by
level control or other monitoring functions.
The post-fader monitor output is intended
for connection to the inputs on a monitor
loudspeaker system. Both the pre- and
post-fader monitor outputs are compat-
ible with equipment that requires balanced
AES3 digital audio signals with an output
impedance of 110 ohms and a signal level
of 5 volts peak-to-peak (Vpp).
A sophisticated bass management function
is integral to the Model 780-01’s design
and can be enabled if desired. The overall
goal of bass management is very simple:
ensure that the entire audio bandwidth of
all channels can be accurately monitored.
Many loudspeaker systems have inher-
ent low-frequency limitations, preventing a
true sonic “picture” of the source material
from being presented. To overcome this,
the low-frequency energy from the seven
channels associated with the surround
inputs and the two channels associated
with the stereo input can be separated and
routed to the subwoofer (SUB) channel of
the post-fader monitor output. Several of
the bass management functions can be
configured to match the requirements of
specific installations.