Studio Technologies 220 2008 - Manual (Page 23)

Model 220 User Guide Issue 4, October 2008
Studio Technologies, Inc. Page 23
the user is provided with a consistent
and easy-to-use set of headphone level
controls.
Minimum Level Mode
Switch SW4-3 is used to configure the
headphone output’s minimum level. In
the –40 dB mode the minimum head-
phone output level is 40 dB below maxi-
mum. The headphone output channels
will never fully mute. This ensures that
any audio signal present on the selected
Model 220 inputs will always be present
on the headphone output. In most on-air
broadcast applications this is the appropri-
ate setting.
important. This could occur when the
connected headset or headphones are
at times placed on a desk or tabletop.
Main Output Source
Switch SW4-4 is used to select which
audio source is routed to the main output.
The choices are the output of the micro-
phone preamplifier or the output of the
compressor circuit. For most on-air ap-
plications the output of the microphone
preamplifier is the desired source. This
will provide the most natural audio quality
with the potential for a large amount
of dynamic range.
Figure 15. Main output source settings
When the full mute mode is selected
and the level/level mode is also selected,
moving either control to its fully counter-
clockwise position will cause its associ-
ated channel to fully mute.
When the full mute mode is selected and
the level/balance mode is also selected,
turning the level control to its fully coun-
terclockwise position will cause both
headphone channels to mute. Turning the
balance control to either its fully clockwise
or fully counterclockwise position will
cause the appropriate channel to mute.
Selecting the full mute mode may be
appropriate for applications where mini-
mizing the chance of audio “leakage” is
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
Switches SW4-7 and SW4-8 are used to
configure the overall operating mode of
the Model 220. Understanding how the
Figure 14. Headphone output minimum level
settings