Studio Technologies 220 2004 - Manual (Page 18)

Model 220 User Guide Issue 2, August 2004
Studio Technologies, Inc. Page 19
this occurs is where on-air talent needs to
have a headset’s boom microphone come
across the right side of their face, rather
than the more-typical left side. In this case
it’s important to select the left- and right-
channel headphone source assignment
accordingly. With the Model 220’s flexible
source selection there’s no reason why
users, such as on-air talent, shouldn’t have
their cue sources assigned correctly.
There may be cases where a monaural
“single-muff” headset or headphone will be
connected to the Model 220’s headphone
output. In this case the desired source(s)
should be routed only to the left channel.
No sources should be assigned to the right
channel. This will eliminate the short-circuit
current that could occur when a 2-conduc-
tor (monaural) plug is mated with the Model
220’s 3-conductor (stereo) headphone
output jack.
Operating Modes
The sixteen switches associated with switch
assemblies SW3 and SW4 are used to con-
figure the Model 220’s operating modes.
Technically, these switches “talk” to the
microcontroller integrated circuit and asso-
ciated software that give the Model 220 its
“smarts.” The software has been carefully
designed to provide a number of different
ways in which the unit can function. It’s
critical to carefully review the available op-
tions and choose the ones that best meet
the needs of a specific application. Note
that switches can be changed even while
the Model 220 is powered up and operat-
ing. The unit’s operating characteristics will
change in “real-time” in response to con-
figuration changes.
Main Output Button Mode
Switches SW3-1 and SW3-2 configure
how the main output button functions.
Figure 7. Main output button mode settings
There are four available modes:
• Push to mute: In this mode the main
output is normally active. The main
output will mute whenever the button
is pressed and held. This is the “cough”
mode typically used for on-air sports
broadcasting applications.
• Push to talk: In this mode the main out-
put is normally muted. The main output
will become active whenever the button
is pressed and held.
• Alternate action: In this mode the main
output will change between its active
and muted state whenever the button
is pressed. Upon power up the main
output will be in its muted state.
• Hybrid: This mode is a combination
of push to talk and alternate action. It’s
similar to the way talk buttons function
on user stations associated with broad-
cast and production intercom systems.
If the button is pressed and held, the
main output will become active until
the button is released. If the button is
momentarily “tapped” the main output
will change state. Upon power up the
main output will be in its muted state.