Studio Technologies 591 - Manual (Page 29)

Issue 1, September 1999 Model 58/591 User Guide
Page 32 Studio Technologies, Inc.
A/B Output Select
The A/B button is used to select the moni-
tor output to be connected to the Model
58’s output circuitry. Two LEDs are associ-
ated with the button, displaying the active
output. Pressing the button “toggles”
between the A and B outputs. There is a
special configuration that allows this but-
ton to be disabled. This would be appropri-
ate if connections were made only to
output A. If this configuration has been
selected, pressing the A/B button will
result in no action occurring.
Reference Level
The reference level button, labeled REF,
sets the monitor output level to a preset
value. This level is normally set, at the
time of system installation, by a technician,
using a sound-pressure-level (SPL) meter.
The LED associated with the reference
level function lights steadily whenever the
function is active. When reference level
mode is active the rotary level control is
disabled, as is the remote level control
input function.
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
configured as the reference level, the
reference LED will flash. This also holds
true for the remote level control, if config-
ured.
Mute All
The mute all function is highly complicated
to operate—not! Pressing the mute all
button causes the active monitor output
(A or B) to mute. 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, along with the
remote activity LED.
Dim
The dim function is quite self-explanatory.
Press the dim button to enable the dim
mode, which will reduce the monitor output
level by a preset amount. The dim button
is always set to “latch” the function on and
off. Dim activity applies no matter whether
the monitor output level is being set by the
rotary control, the reference button, or, if
configured, the remote level control. The
dim level can be configured for 10, 15, 20,
or 25dB, so one of those values will apply
when dim is active. The LED associated
with the dim button will light whenever dim
is active. Note that if dim is enabled via the
remote dim function, the dim LED will
flash, along with the remote activity LED.
What’s not so self-explanatory is the auto-
dim-off function. Whenever dim is enabled
due to the dim button being pressed, and
reference mode is not active, changing the
rotary level control or, if configured, the
remote level control, will automatically turn
off dim. The auto dim off function is a
unique attempt at protecting the health of
audio engineers. No longer will there be
a heart-stopping blast of audio when the
dim button is pressed, supposedly to
enable dim, but actually turning it off
because dim was already enabled. It’s
hard to explain unless you’ve used an
audio console and experienced this in
person—trust us, this situation does hap-
pen! Auto dim off is a wonderful “real-
world” function.
Note that the auto dim off function is not
active whenever dim is on due to the
remote dim function being active. This
allows remote control equipment, such