User Guide

Model 780-01/790 User Guide Issue 4, December 2020
Studio Technologies, Inc. Page 7
for Surround
Figure 3. Model 790 Control Console Front Panel
Channel mute/solo
Mute/solo
mode
Post-fader surround
monitor output
• Surround/stereo
• Reference level
• Mute all
• Dim
• Rotary level control
Monitor output
level display
Input source
select
Downmix
Great care was taken in designing the
system’s architecture, ensuring that the
character of the audio input signals was
preserved. All audio processing, including
bass management, is performed in 32-bit
logic using a high-speed field-program-
mable gate array (FPGA) integrated circuit.
High-performance integrated circuits are
used to perform input, output, and clocking
tasks.
The Model 780-01 occupies one space
(1U) in a standard 19-inch rack. Digital
audio sources are interfaced with the Model
780-01 using one 25-pin female D-sub-
miniature connector and one 3-pin female
XLR connector. A BNC connector is used to
interface with an external sync source. Pre-
and post-fader digital monitor output signal
connections are made using a 25-pin fe-
male D-subminiature connector. One 9-pin
female D-subminiature connector is used to
connect the Model 780-01 with a maximum
of four Model 790 or Model 71 Control Con-
soles. A second 9-pin “D-sub” connector
is used to interface with remote control
signals. AC mains power is connected
directly to the Model 780-01, with an ac-
ceptable range of 100 to 240 V, 50/60 Hz.
Additional Details
The Model 790 provides three buttons
and associated LEDs for selection of the
source to be monitored. The choices are
the two surround inputs and the stereo
input; only one source can be monitored
at a time. It’s interesting to note that while
the surround inputs have an LFE channel
associated with them, the corresponding
post-fader monitor output channel is des-
ignated as subwoofer (SUB), rather than
LFE. This terminology was selected to
highlight the fact that this output channel
may include more than just LFE content.
The bass management function, if en-
abled, will redirect low-frequency energy
from the main channels, combine it with
the contents from the LFE input channel,
and route the combination to the post-
fader monitor output’s subwoofer (SUB)
channel.