User Guide

Issue 4, December 2020 Model 780-01/790 User Guide
Page 40 Studio Technologies, Inc.
for Surround
4-digit display will always show the output
level in positive numbers. These numbers
are intended to represent the sound pres-
sure level in dB SPL, a figure that should
directly relate to the actual sound pressure
level that the loudspeaker system is pre-
senting to users. (Typically, the level value
would actually be in dBC, the C-weighted
sound pressure level.) When the refer-
ence level button is enabled, or the rotary
level control is set so that the reference
level has been reached, the display will
typically show something in the range of
82 to 87 dB. Assuming that the monitoring
environment has been correctly calibrated,
this would indicate that an average listen-
ing level of 85 dB, for example, had been
achieved.
Remote Control Inputs
As previously discussed in the Installation
section of this user guide, two remote con-
During normal operation, press and hold the Mute/Solo button
to view and change the input delay setting.

This LED displays the current
setting of the input delay.
LED not lit means input delay A
is selected; LED lit means input
delay B is selected. Press the
button to change the setting.
The display shows the currently
selected input delay in milliseconds.
trol signals can be connected to the Model
780-01. The functions are remote mute all
and remote dim. When an external signal
activates remote mute all the LED on the
Model 790 associated with the mute all
button will flash. If mute all was already
active when the remote mute all function is
activated, the LED will change from being
steadily lit to flashing.
When an external signal activates remote
dim the LED on the Model 790 associated
with the dim button will flash. If dim was al-
ready active when remote dim is activated,
the LED will change from being steadily lit
to flashing.
Model 71 Control Console
The Model 71 Control Console provides
a rotary level control, two pushbutton
switches, and three LEDs for control and
status display. The rotary level control
Figure 10. Selecting the input delay