Studio Technologies 76DA V.3.01 - Manual (Page 37)

Model 76DA/77 User Guide Issue 2, April 2011
Studio Technologies, Inc. Page 37
for Surround
all button is always set to “latch” the func-
tion 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 digital and analog monitor out-
put levels to be reduced by a fixed amount.
The Model 77’s configuration mode allows
the dim level to be selected from among
four choices: –10.0, –15.0, –20.0, or
–25.0 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 digital and analog monitor out-
put level. If the requested “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 ro-
tary 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 enabled 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
digital and analog monitor output levels.
The level control provides the ability to
adjust the post-fader surround and stereo
digital and analog 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
attempts to set the output level for less
than –70.0 dB, the post-fader surround
and stereo digital and analog monitor
output channels will automatically mute.