Studio Technologies 60 - Manual (Page 13)

Issue 2, March 1998 Model 60/61 User Guide
Page 16 Studio Technologies, Inc.
the insert switcher. Correct operation of
the switches depends on how the insert
switcher section is wired into your specific
audio system. There are two ways
the insert switcher may have been config-
ured: as an insert switcher or as an input
source switcher. When configured as an
insert switcher a signal is sent from, and
returned to, an audio workstation. The
three switches are used to select which
of the insert devices are active in the audio
“chain.” An insert switch set to its active
position routes signal to the insert device
and connects the device’s output into the
signal path. A switch set to its bypass
position will still route audio to the insert
device, but does not connect to the
device’s output. If all three switches are
in the bypass position then the unmodified
input signal is routed directly back to the
workstation.
When configured as an input source
switcher, operation of the three push-
buttons is quite easy but with a little “twist”
that must be remembered: only one of the
switches can be set to the active position
at a time. When all three switches are in
their bypass position, input 1, connected
to the insert switcher’s main audio input,
is routed to the output. To select input 2
place switch A to the active position;
ensure that switches B and C remain in
bypass. Follow the same rules to select
inputs 3 and 4. Should you make a mis-
take and have more than one switch in the
active mode at the same time, the “last”
switch will take priority. As an example:
if you have switches A and C in the active
position, input 4 (handled by switch C) will
be selected as the input source.
Control Room Monitoring
Using the four push-button switches
located on the Model 60’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 60 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 clearly heard.
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 3dB, and sends
the resulting signal to both the left and
right control room outputs.
The Model 60 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 60’s front panel, lights. Note that
when mute is active the control room level
pot on the Model 61 is disabled.