Studio Technologies 76DA V.3.01 - Manual (Page 36)

Issue 2, April 2011 Model 76DA/77 User Guide
Page 36 Studio Technologies, Inc.
for Surround
Surround and Stereo Digital and Analog
Outputs
The surround/stereo function allows
selection between two different loudspeak-
er systems. When the surround output is
selected the six post-fader surround digital
and analog monitor output channels are
active. The channels associated with the
post-fader stereo digital and analog moni-
tor outputs are muted. When the stereo
output is selected the left and right chan-
nels associated with the post-fader stereo
digital and analog monitor outputs become
active; the six channels of the post-fader
surround monitor digital and analog out-
puts mute.
Remember that the Model 77 Control
Console can be configured to disable the
surround/stereo button. If the button is
pressed and the post-fader stereo digital
and analog monitor outputs are not select-
ed, this must be the case!
Display Current Sample Rate
The surround/stereo monitor output select
button is also used to display the system’s
current sample rate value. Pressing and
holding the surround/stereo button will
cause the current sample rate value to
be displayed: 32.0, 44.1, 48.0, 88.2, 96.0,
176.4, or 192.0. This can be useful during
troubleshooting or just for general interest.
Once the button is released normal display
operation will resume.
Reference Level
The reference level button sets the post-
fader surround and stereo digital and
analog monitor output levels to a preset
value. Technical personnel, using a sound-
pressure-level (SPL) meter and precision
signal source, should have set this level
to meet the requirements of the specific
monitoring environment. The LED associ-
ated with the reference level button will
light whenever the function is active. The
4-digit display will indicate the reference
output level. Note that the system’s default
reference level is –60.0 dB so “out of the
box” the Model 77 will display –60.0 when
reference level mode is enabled.
How the rotary level control functions
whenever the reference level mode is
active depends on a configuration setting.
If the auto reference level off function is
disabled turning the rotary level control will
have no impact on the reference level func-
tion; it will remain active. If the auto refer-
ence level off function has been enabled
turning the rotary level control will cause
the reference level function to automati-
cally turn off.
The LED associated with the reference
level button can also serve as a calibra-
tion aid. If the reference level mode is
not active, whenever the post-fader sur-
round or stereo digital and analog moni-
tor output levels are precisely the same
as that stored for the reference value the
reference level LED will flash. This exact
level can be reached through the use of
the rotary level control, either by itself
or through the setting of the rotary level
control in conjunction with the dim function.
Whatever path the post-fader surround and
stereo digital and analog monitor outputs
take to reach the reference level value, it
will cause the reference level LED to flash!
Mute All
Pressing the mute all button causes the
output channels associated with the post-
fader surround and stereo digital and
analog monitor outputs to mute. The 4-digit
display indicates the mute condition by
showing four dashes (– – – –). The mute