Studio Technologies 60A - Manual (Page 15)

Model 60A/61 User Guide Issue 1, June 2003
Studio Technologies, Inc. Page 15
LED is lit whenever AC mains power is
applied to the unit. The control room mute
LED is lit whenever the mute function is
active. For normal control room speaker
operation the mute LED must not be lit.
There are two LEDs on the Model 61
Control Console. One indicates the status
of the control room mono function, the
other the status of the cue (talk to head-
phones) function.
Auxiliary Switcher
On the left side of the front panel are three
switches labeled A, B, and C. These are
part of the Model 60A’s auxiliary switcher
section. What action is associated with the
switches depends on the specific installa-
tion. As a general-purpose set of connec-
tors and switches, many different functions
can be implemented by the installer. They
might be serving as a speaker selector,
input source selector, or performing some
other interesting function.
Some general comments about using the
switches may be helpful. Like the control
room and dub select switches, one, two,
or all three of the switches can be simulta-
neously selected. It’s also possible to have
no switch selected; simply “tap” a button
that is currently selected to release all the
buttons.
Control Room Monitoring
Using the four push-button switches
located on the Model 60A’s front panel,
one or more of the input sources can be
selected for monitoring. The switches are
such that you can simultaneously depress
and “lock-in” two, three, or all four. Some
practice may be required to get the “feel”
of selecting multiple inputs. Circuitry in the
Model 60A electrically sums (adds) the
sources you select.
The control room output level is set using
the rotary control (“pot”) on the Model 61
Control Console. When the pot is fully
counterclockwise the output is attenuated
by approximately 70dB, not a full mute.
Whenever the cue (talk to phones) func-
tion is active the control room output level
attenuates (dims) by approximately 18dB.
This can prevent acoustic feedback and
allows voice signals to be heard clearly.
The Model 61 Control Console contains a
push-button switch to activate the monau-
ral function. The switch is electrically set
for latching operation; press once to active
mono, press again to go back to stereo.
An LED, located directly above the mono
switch, displays mono status. The mono
function sums (adds) the left and right
source(s), drops the level 6dB (voltage),
and sends the resulting signal to both the
left and right control room outputs.
The Model 60A Central Controller allows
the connection of a switch or relay contact
to enable a control room output mute
function. Whenever mute is active the
control room output is effectively disabled,
and the mute status LED, located on the
Model 60A’s front panel, lights. Note that
when mute is active the control room level
pot on the Model 61 is disabled.
Dub Output
Four push-button switches, located on the
Model 60A’s front panel, are used to select
one or more of the input sources to be
routed to the dub output. Circuitry in the
Model 60A electrically sums (adds) the
sources you select.
A rotary level control (“pot”) on the Model
60A’s front panel is used to set the dub
nominal output level. This allows the dub
output level to be quickly set to match