Studio Technologies 230 2008 - Manual (Page 28)

Issue 7, October 2008 Model 230 User Guide
Page 28 Studio Technologies, Inc.
returned, via an external cue feed, to one
of the Model 230’s inputs. In this system
mode the buttons and LED indicators
function identically to that of the standard
on-air mode, but internal audio routing
and operation of the headphone level
controls work quite differently. Whenever
audio is being sent to the main output or
talkback functions, it is also routed to the
left and right channels of the headphone
output. This provides the on-air talent with
a confidence (“side-tone”) audio signal.
In the on-air with special sidetone mode
the two controls no longer provide a level/
level or a level/balance mode of operation.
Instead, the left control is used to adjust
the level of the sidetone signal being sent
to the left and right channels of the head-
phone output. The right control no longer
adjusts the level of the right channel head-
phone output or, if configured for “level/
balance” mode, the left/right balance. The
right control is used to adjust the level of
the external cue signals that are assigned
to the left and right channels of the head-
phone output. To highlight, the right rotary
control acts as a stereo level control—the
left/right balance of the externally provided
cue signals can’t be adjusted. This is a
compromise that shouldn’t pose a serious
operational problem.
Note that when the system mode is config-
ured for on-air with special sidetone, two of
the three configurable headphone control
parameters continue to function in their
normal ways. The minimum level mode
performs the same functions. The reverse
left/right function selects which control is
used for sidetone level and which control
is used to adjust the level of the externally
provided cue sources. However, the head-
phone control mode that selects between
dual channel (“level/level”) and stereo
(“level/balance”) is no longer active.
When the system mode is set for produc-
tion 1 two major changes occur as com-
pared to the on-air mode. The first change
is that the main output becomes a “hot
microphone output.” This is created by
permanently routing audio from the micro-
phone preamplifier to the main output. The
main output provides a line-level signal that
is never muted in response to any of the
buttons being pressed.
The second change that occurs with
production 1 is that the line-level talkback
output is now controlled by the main out-
put pushbutton. This allows the line-level
talkback output to be used, for example,
as a third talkback function. In this way, the
line-level talkback output and the talkback-
to-intercom functions can be used indepen-
dently with no interaction between them.
The three buttons will control the talkback
functions and can be used simultaneously.
As is always the case, the audio source for
the line-level talkback output is the output
of the compressor circuit.
When the system mode is set for produc-
tion 2, the main output is never muted in
response to a talkback function being ac-
tive. It is controlled only by the main output
pushbutton. This mode allows the main
Figure 19. System mode settings