HD1490 HD Encoder Frame Card
Duration
Duration sets the transmission duration of the newly
created packet. When a packet’s duration period ex-
pires, it will be deleted from the XDS queue. A dura-
tion setting of -1 will cause the packet to be inserted
until it is deleted by a future command. An integer
setting (i.e. 100) will be interpreted as the number
of times to output the packet before deleting it. An
Elapsed Time setting (i.e. 00.45.00), will cause the
packet to be inserted for that length of time, begin-
ning when the command is entered, and then deleted.
Content
Content sets the information content of the packet.
Content can be entered in ASCII text enclosed in curly
braces, or in ASCII Hex notation. If you enter data in
ASCII hex mode, you must only use ASCII hex char-
acters between 0x20 and 0x7f. A checksum need not
be enclosed, as the Encoder will calculate it automati-
cally before insertion.
Priority
Priority is an optional parameter that allows the out-
put priority of a packet to be customized.
The pa-
rameter should not be used for standardized, com-
monly used packets, which the Encoder automatically
assigns appropriate priorities. The parameter is use-
ful for custom, user-defined packets. The default pri-
ority for packets that the encoder does not recognize
is 115, which corresponds to a fairly low priority. A
typical high priority value is 30. A packet’s numerical
priority is inversely proportional to the frequency with
which it is inserted.
Two sample XDS entries follow.
<CTRL+A>P 103 -1 Evening News <ENTER>
will load and begin
insertion for a current program name packet reading "Evening News."
The packet will be output until a new packet is entered.
<CTRL+A>P 105 00.30.00 4844 <ENTER>
will load and begin in-
sertion for a current program rating packet of TV-PG. The packet will be
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