User Guide

Model 76D/77 User Guide Issue 13, December 2020
Studio Technologies, Inc. Page 41
for Surround
Mute All
Pressing the mute all button causes the
output channels associated with the post-
fader surround and stereo monitor outputs
to mute. The 4-digit display indicates the
mute condition by showing four dashes
(– – – –). The mute all button is always set
to “latch” the function on and off. The LED
associated with the mute all button will
light whenever mute all is active. Note that
if mute all is enabled via the remote mute
all function, the mute all LED will flash.
Dim
The dim function is provided for user con-
venience, allowing the post-fader surround
and stereo monitor output levels to be re-
duced by a fixed amount. The Model 77’s
configuration mode allows the dim level to
be selected from among four choices: 10,
15, 20, or 25 dB. Pressing the dim button
will enable the function. The dim button is
always set to “latch” the function on and
off. The 4-digit display, when selected for
output level mode, will indicate the revised
post-fader monitor output level. If the re-
quested “dimmed” output level is equal to
or less than –96.0 dB, the monitor outputs
will go into full mute and the display will
show four dashes (– – – –). When dim is
active the post-fader monitor output level
reduction will apply no matter whether the
level is being set by the rotary level control
or by the reference level button. The LED
associated with the dim button will light
whenever dim is active. If dim mode is en-
abled via the remote dim function the dim
LED will flash.
It’s worth using a few sentences to discuss
the auto dim off function. Whenever dim
is enabled due to the dim button being
pressed, and the rotary level control is
active (reference level mode is not active),
changing the setting of the rotary level
control will automatically turn off dim. The
auto dim off function is a unique attempt
at protecting the aural health of users. No
longer will there be a heart-stopping blast
of audio when the dim button is pressed,
supposedly to enable dim, but actually
turning dim off because it was already
enabled. It’s hard to explain unless you’ve
experienced this in person—trust us, this
situation can and does happen!
Note that the auto dim off function is not
active whenever dim is enabled due to
the remote dim function being active. This
allows remote control equipment, such
as a talkback system, to reliably dim the
monitor outputs.
Rotary Level Control
The rotary level control is used to manually
adjust the post-fader surround and stereo
monitor output levels. The level control
provides the ability to adjust the post-fader
surround and stereo monitor output levels
over a 70-dB range. Technically the rotary
level control is a 24-step-per-revolution
mechanical encoder. The amount of level
change in dB per step (“click”) will depend
on how quickly the control is turned. When
rotated slowly, each step represents a 0.5-
dB change in level. In this case, to traverse
the entire level range would require rotat-
ing the control more than five full turns. But
the Model 77’s software detects when the
control is rotated more quickly and increas-
es the amount of level change in dB per
step. A little experimentation will allow the
user to acquire a good “feel” for how best
to use the control.
The reference level LED will flash when
the rotary level control sets the output level
to be the same as the stored reference
level. Whenever the rotary level control