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Control
of VTRs and VCRs. Depending
on the type of control interface provided by the manufacturer of
the VTR/VCR, it can be controlled by an RS-422 connection or by
relays. Relays can be closed momentarily to simulate pressing a
button, or held open or closed indefinitely.
·
Control
of audio/video routing switchers.
Routing switchers can be controlled explicitly or
implicitly. With explicit
control, switcher SOURCE and DESTINATION appear as separate
columns in the MASTER SCHEDULE.
With implicit
control, ComSched for Windows
deduces the SOURCE and DESTINATION from other scheduled
information.
A common example of implicit control
occurs when a routing switcher is used to connect a group of
satellite receivers with a group of VTRs and VCRs.
In this case, ComSched
for Windows
automatically directs the switcher to connect the output of the
scheduled receiver to the input of the scheduled VTR/VCR.
·
Control
of satellite receivers not accommodated in the standard version of
ComSched
for Windows. Control can be implemented over RS-232, RS-422, or parallel
BCD links. |
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·
Control
of coaxial relays or coaxial switchers.
Coaxial control can be explicit or implicit. With explicit
control, a dedicated column appears in the MASTER SCHEDULE. With implicit
control, ComSched
for Windows
deduces the correct relay and switcher settings from other
scheduled information. In
multiple-antenna installations, elaborate "trees" of
relays can be controlled implicitly.
A common example of implicit control
occurs when a coaxial switcher is used for LNB switching at the
input to a group of satellite receivers.
In this case, ComSched
for Windows
selects the LNB which matches the scheduled transponder.
·
Control
of scan converters and similar devices such as digital video
decoders. Control can
be explicit or implicit. With
explicit control, a
"SCAN" column appears in the MASTER SCHEDULE.
With implicit
control, ComSched for Windows
deduces the scanning standard from the scheduled satellite and
transponder information. |
