HD9084 HDTV Caption Encoder Manual
SERIAL CONTROL PROTOCOL Page 4-19
4.5.3. Queue XDS Packets
This command will delete the entire specified XDS output queue and replace it with the packets named
(if any). The user enters the packet ids of the XDS packets separated by <cr> in the order that they are
to appear in the output queue. The user enters the packet id of each packet separated by <sp> in the
order that they are to appear in the output queue.
Command: ^A8<sp>F2 edsid<sp>edsid...edsid<cr>
Default: none
The parameter edsid identifies the packet id of each packet to be placed in the XDS queue. If no
packet id is given, the XDS output queue is cleared and no XDS information will be output.
4.5.4. Delete XDS Packet
This command allows the user to remove an XDS packet from the article memory. If the XDS packet is
currently being output, it will not be removed until it has been completely output.
Command: ^AP<sp>edsid<cr>
Default: none
The edsid parameter identifies the packet to be deleted.
Examples: ^AP<sp>0103<cr>
The program name packet will be removed from memory.
4.5.5. Inserting XDS Articles into Non-Volatile Memory
The HD9084 can store XDS articles in non-volatile memory, so that in case of a power failure, XDS
information can be retained. All XDS articles starting with “05” (channel class) and “07” (miscellaneous
class) are preserved in non-volatile memory. Other classes are not stored through a power low, and
must be re-entered by the user upon power up.
4.6. COMM PORT CONTROL COMMANDS
The HD9084 enables the communication ports to simultaneous access the caption keyers. This can be
the effective equivalent of multiple caption encoders linked in a series. By using a single video keyer,
these encoder models provide the added advantage of minimizing the delays and the impact on the
video quality. Several commands are provided in order to prevent data conflicts and allow the user to
control which ports can affect the data. The caption encoder maintains a permission list that indicates
which ports will be allowed to alter various kinds of data. The permissions for each port can be set from
the front panel menus or they may be set from the communication control ports. The permission list is
maintained in non-volatile memory. The data types are denoted as follows:
Data Type C1 or CC1
captions field 1
C2 or CC2 captions field 2
T1 text field 1
T2 text field 2
XD or TX extended data services
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