Input Xds - evertz 8083XDS-AD Instruction Manual

SERIAL PROTOCOL
8083XDS-AD Analog and SD-SDI XDS Encoder
XDS packets are stored in the article memory and output in the XDS data
channel in Field 2. These packets are placed into the XDS output queue in
the order specified by the user and inserted into Field 2 according to the
space available. EIA-608-B specifies that when there is caption or XDS
information in field 2, then there must be at least a null caption signal
present in field 1 as well. When encoding into field 2, the 8083XDS-AD
automatically detects whether there is a caption signal present in field 1. If
necessary It will turn on the Field 1 keyer automatically (the FIELD ! LED
will blink) and turn it off again when upstream field 1 captions resume.
The computer uses an ASCII hex notation in describing the XDS packet id
and data to the XDS encoder. For example to specify the letter A enter a 4
followed by a 1 (the hex ASCII code for A is 41)
The XDS packets are deleted from memory when they have been
transmitted the specified number of times. XDS packets will be lost from
the encoder's memory in the event of a power loss. The 8083XDS-AD
uses an advanced memory allocation scheme that allows them to store a
virtually unlimited number of XDS packets at one time. The only limit is the
total amount of random access memory available.
Upstream XDS packets will be blocked by packets of the same type in the
output queue.
4.6.1

Input XDS

This command allows the user to input an XDS packet into the XDS
encoder's article memory
If an XDS packet with identical edsid exists it will be deleted and replaced
with the new packet definition.
Command: ^AP<sp>edsid<sp>rc<sp>data...data<cr>
Default none
The parameter edsid identifies the XDS packet id. The XDS packet can
subsequently be referred to by its packet id. If the XDS packet already
exists, the previous XDS packet with that packet id will be replaced by the
new packet. The edsid is entered in ASCII hex notation. For example to
enter a packet id with a class of 01h and a type of 23h enter a 0 followed
by a 1 followed by a 2 followed by a 3. The leading zero of the class is
optional.
The parameter rc identifies the number of times the packet will be
repeated. Values of 9999 or FFFF indicate that the packet should be
repeated indefinitely. A packet's repeat count will be decremented each
time it is output.
Revision 1.0.2
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