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8083XDS-AD Analog and SD-SDI XDS Encoder
6.1.9 The Caption Shift Up GPI is not working properly.
The Caption Shift Up GPI on parallel remote control pin 8 moves caption
text from rows 12 through 15 and repositions them to rows 1 through 4. It
does this by translating the Preamble Address Codes (PACs) embedded in
the caption data. A PAC control code is typically sent before each new line
of text to position the display cursor. After the GPI has been activated,
captions will not shift up until a new PAC is transmitted. A caption that is
already displayed on the screen will not shift up when the GPI is activated.
Some real-time captioning software that uses roll-up captions does not
encode PACs. There may be options in your captioning software to remedy
this situation. If a show has been pre-captioned using roll-up captions
without PACs, the Caption Shift Up GPI will be ineffective on this program
material. There is presently no solution for this particular problem.
6.1.10 How can I block upstream captions?
Depending on the user's specific needs, there are many ways to
accomplish this. If all upstream captions are to be blocked, the
recommended approach is to issue the serial port commands ^A6 F1 and
^A6 F2 to place both Field 1 and Field 2 into NULL STATE. Another
solution is to place the XDS encoder in FIELD mode of operation from the
front panel Engineering menu.
If only a particular data channel is to be blocked, such as Text Channel 2,
use STREAM mode of operation, and execute the serial command ^A6 T2
to place this particular channel in NULL STATE. To block all upstream XDS
material, issuing ^A6 TX will put only the XDS stream into NULL STATE.
Presently there is no way to block specific XDS packet types, unless these
are being replaced with updated packets of the same type by the XDS
encoder. If an entire field is to be blocked, use ^A6 F2 to place all of Field 2
in NULL STATE.
6.1.11 How can I pass upstream captions?
If upstream captions are being blocked, either the XDS encoder is in FIELD
mode, or the user's captioning software has failed to relinquish control of
the encoder so upstream captions may pass.
The recommended solution is to switch the unit to STREAM mode of
operation.
6.1.12 How can I encode XDS / V-Chip "Content Advisory" or
"Program Rating" packets?
See section 4.6 of this manual for instructions on how to enter any XDS
packets into the XDS data stream. The manual does not attempt to provide
a comprehensive list of valid XDS packet types. The reader is encouraged
to refer to the EIA-608-B standard for the currently supported and required
packet types. For the V-Chip program rating packet, EIA-744-A serves as
an addendum to EIA-608-B-A.
TROUBLESHOOTING
Page 6-3
Revision 1.0.2
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