Studio Technologies 68A 2001 - Manual (Page 32)

Issue 1, March 2001 Model 68A/69A User Guide
Page 32 Studio Technologies, Inc.
for Surround
To highlight for clarity, the bandpass filter
is only available for use when mono has
been configured for the mono-to-center
mode. For a detailed technical description
of the bandpass filter please refer to the
Technical Notes section of this guide.
To enable the bandpass filter feature
requires knowing a “secret” button push
method. But it’s not much of a secret,
as you simply press and hold the mono
button for two seconds to enable the
function. From that point forward, when-
ever mono is enabled the bandpass filter
will also be enabled. To indicate that the
bandpass filter is enabled, the LED associ-
ated with the mono button will flash on and
off whenever mono is enabled. To disable
the bandpass function, press and hold the
mono button for two seconds. The change
will be indicated by the LED, which will
now light steadily whenever the mono
function is enabled.
Monitor Output General
Functions
Four buttons and one rotary control are
associated with the monitor output func-
tions. The buttons control operation of
surround and stereo outputs, reference
level, mute all, and dim. The rotary level
control is used to manually set the monitor
output level.
Surround and Stereo Outputs
The surround/stereo function allows selec-
tion between two different loudspeaker
systems. When the surround output is
selected the six surround output channels
are active. The two channels associated
with the stereo output are muted. When
the stereo output is selected the left and
right channels associated with the stereo
output become active; the left and right
channels of the surround output mute.
In most cases surround output channels
center, left surround, right surround, and
LFE will also mute. However, a configur-
able parameter does allow these channels
to remain active when the stereo output is
selected. There are two LEDs associated
with the surround/stereo button, providing
a visual display of the active output.
Remember that the Model 69A Control
Console can be configured to disable the
surround/stereo button. If the button is
pressed and nothing happens, this must
be the case!
Reference Level
The reference level button, labeled REF,
sets the monitor output level to a preset
value. This level is normally set by a
technician, using a sound-pressure-level
(SPL) meter, at the time of system installa-
tion. The LED associated with the refer-
ence level function lights whenever the
function is active. Whenever reference
level mode is active the rotary level control
is disabled.
The reference LED also serves as a cali-
bration aid. If the reference level mode is
not active, and the rotary level control is
set at precisely the same level as that
stored for the reference value, the refer-
ence LED will flash.
Mute All
The mute all function is highly complicated
to operate—not! Pressing the mute all
button causes the monitor outputs to mute.
The mute all button is always set to “latch”
the function on and off. The LED associ-
ated 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.