PTC-892 version 1 C
10
PTC-892 Rear Panel Connections (continued)
LTC Input
Figure 8
Longitudinal Time Code (LTC) input
: Green is an input XLR plug that expects
LTC with a n4dbu analog signal.
This time code can be sent out its communication port (s) so that captioning software
can triggered from this input or the unit can send out a trigger for the software.
Note:
If you are sending out time code the baud rate of 4800 is recommended, because
the baud rate of 1200 is not fast enough and 2400 may not be either.
Weather Lift GPI
Figure 9
Weather lift GPI
: Green requires a 3.5mm male mono audio plug that is
activated when shorted
.
Optional Weather lift GPI plug available upon request.
The PTC-892 provides a “weather lift” function to comply with federal regulations
requiring captioning not interfere with emergency information scroll. This capability will
automatically “move” the captions up one thru four lines when activated. The “lift” is
provided for all captioning, CC1 to CC4, whether it is local captioning or pass thru from
another source.
The weather lift function in the PTC-892 is implemented with several options
available to the user. Its front panel selection can be used to set the amount of “lift” or
the amount of lift can be set by the ^AW command (see software instruction set)
through communication ports. The ^AW commands over-rides the front panel selection.
^AW0 - no lift lines selected.
^AW1 - one lift line selected.
^AW2 - two lift lines selected.
^AW3 - three lift lines selected.
^AW4 - four lift lines selected.
Содержание Caption Encoder/Decoder SD SDI/Analog PTC-892
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