Studio Technologies 220 2013 - Manual (Page 24)

Issue 5, February 2013 Model 220 User Guide
Page 24 Studio Technologies, Inc.
In some applications it may be desirable
for the output of the compressor circuit to
be routed to the main output. Appropriate
applications could include on-air broad-
cast situations where nonprofessional
talent is present. Controlling the dynamic
range of the audio signals on the main
output can limit the chance of cable cross-
talk and equipment overload. Another typi-
cal application where using the output of
the compressor would be when the Model
220’s system mode is selected for produc-
tion. In this case the main output would be
used as an additional talkback output and
dynamic range control could be beneficial.
System Mode
Switch SW4-8 is used to configure the
overall operating mode of the Model 220.
Understanding how the two modes impact
overall system operation will ensure that
correct operation and maximum usability
will occur. When selected to the on-air
mode, the main output will mute when-
ever a talkback function is active. The LED
indicators associated with the main output
will light accordingly. The on-air mode
should be selected for all on-air broadcast
applications. It’s imperative that the main
output be muted whenever on-air talent is
using one the talkback functions to com-
municate with production personnel.
When the system mode is set for pro-
duction, the main output is never muted
in response to a talkback output being
active. This mode allows the main output
to be used, for example, as an additional
talkback output. In this way the main and
talkback outputs can be used indepen-
dently, with neither impacting the other.
This also allows all three buttons to be
used simultaneously.
In summary, when selected for the correct
application, each system mode can prove
to be very useful. A thorough study of how
they impact the Model 220’s operation
can lead to many interesting and powerful
uses.
Conclusion
Once the switches have been set to the
desired configuration, it may be time to
reattach the security plate. The exception
is if the trim pots associated with the line
inputs are going to be adjusted. Details
are provided later in this user guide. The
plate attaches using the four rubber bum-
pers. They should be hand-tightened only;
no tools are to be used.
Operation
At this point the desired input, output,
and power connections should have been
made. The button labels may have been
revised. Finally, the configuration switches
should have been set. Normal operation
of the Model 220 can now begin. The
unit will begin functioning as soon as
a power source is connected. As previ-
ously discussed, the power source can
Figure 16. Main output source settings Figure 17. System mode settings