evertz hd9084, Instruction Manual

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HD9084 HDTV Caption Encoder Manual
SERIAL CONTROL PROTOCOL Page 4-13
4.3.16. Display System Status
This command displays the upstream line 21 data channels that are turned on (i.e.: upstream data
being passed through to the output) and the number of bytes of memory remaining to store articles and
XDS packets.
Command: ^AAcr>
Default: none
Examples: ^AAcr>
Returns:
Example with all channels On:
Memory Status: Avail-005453 # Segments-000011 Largest Avail-005453
Channel Status:
Field 1:C1 C2 T1 T2 ON
Field 2:C3 C4 T3 T4 XD ON
Example with all channels On except T3:
Memory Status: Avail-005453 # Segments-000011 Largest Avail-005453
Channel Status:
Field 1:C1 C2 T1 T2 ON
Field 2:C3 C4 T4 XD ON
4.4. TEXT ARTICLES
When the Article state is active, text data can be entered and stored as complete messages. These
messages can be transmitted in any order, any number of times, in any of the text channels. Display
attributes contained within the articles (such as colour, etc.) specifically coded for one data stream will
be translated into the appropriate codes for the text channel they are ultimately inserted into.
The message can be kept in memory or deleted when you have finished transmitting it. Articles will be
lost from the article memory in the event of a power loss. The HD9084 uses an advanced memory
allocation scheme that enables it to store a virtually unlimited number of articles at one time. The only
requirement is the maximum amount of random access memory available.
The command protocol allows editing of each line of the message by use of the ^H (backspace) and ^X
(delete line) characters before the <cr> is input. A delay of 1 to 9 seconds can be inserted into the
article by inserting ^Bn into the article. (n is the number of seconds of delay desired)
Once a text channel is put into Article state, upstream data on that channel will be blocked from the
output queue. A data channel will be in the article state as long as any article is assigned to its output
queue.
4.4.1. Input Article
This command allows the user to input an article to the article memory and assign it to the output queue
of one of the text data channels.
Command: ^A0<sp>name<sp>tc<sp>rc<sp>k/d<sp>o/h<sp>n/l<cr>
data<cr>data . . .data<cr>^C
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