TES9 Software User Manual (Iss. 04)
Appendix B. Captioning Commands • 10–9
The special processing performed on XDS Interval packets is also performed on Fill packets.
Example
The following command will insert the XDS Program Type packet, using values of 21 and 7F for
the program type keywords. The packet is inserted as often as possible, given a priority of 40, and
is inserted for 30 minutes.
<CTRL-A>P0104 30:00 217F 40 P <CR>
Stop Encoding XDS Data
Format: <CTRL-A>P{packet type} <CR>
When this format of the command is used, the Interval or Fill packet of the specified type is no
longer inserted.
Specify Upstream Packet Priority
Format: <CTRL-A>P{packet type} {priority} P <CR>
When this format of the command is used, it does not cause the packet to be inserted; it simply
specifies the priority with which upstream packets of that type are passed through. This is
necessary, since there may not be sufficient space in field 2 to re-insert (pass through) the packet
as often as it is received from upstream. If upstream packets are received, and their priority has
not been specified with this command, then a default of 50 is used.
Store and Forward Upstream Packets
Format: <CTRL-A>N_U{packet type} {delay} <CR>
This command provides a “Store and Forward” capability for upstream packets. This means that
the encoder can receive and store an upstream packet, then continue to insert the packet, on a
cyclic basis, in a period of time during which it is not being received. This would be useful in the
case where a network affiliate wishes to insert information relating to the current program from
the network feed when he is providing a local commercial containing captions.
When this command is received, no packets of the specified packet type are inserted until that
upstream packet is received. Each time the required packet is received, the data is stored in the
encoder. When the time specified by the {delay} parameter expires, then the currently stored
packet of this type is inserted.
Start Encoding Program Descriptor
Format: <CTRL-A> N_PD {tag and data} I={interval} D={duration} <CR>
{priority}
decimal value which specifies the relative time
interval between insertions of the packet, compared
to other packets created with this format of the
command. For example, the time between insertions
of a packet with a priority of 10 would be twice the
time between insertions of a packet with a priority of
5
Table 10.7 Start Encoding XDS Data
Parameter
Description
