Ross TES9, Руководство пользователя программного обеспечения

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10–12 • Appendix B. Captioning Commands TES9 Software User Manual (Iss. 04)
Content Advisory Enquiry
Format: <CTRL-A> N_E2 <CR>
This command is used by a PSIP generator to retrieve the Content Advisory Program Descriptor
packet from the Decode video line in the Program In video signal.
When this command is received by the encoder, the Content Advisory packet most recently
extracted is sent out the serial port in the following format:
• <LF> {content_advisory_descriptor} {checksum} <CR>
• The component {content_advisory_descriptor} is the data formatted according to
Table 6.18 in ATSC A/65.
The Content Advisory message is sent to the PSIP generator as ASCII encoded hex values,
similar to the Service Information message.
Set Operating States
Format: <CTRL-A> N_SET ECHO={state} MR={state} <CR>
This command sets the Echo state and/or the Monitor Ratings state to that specified (ON or OFF).
Either one or both of the ECHO and MR parameters may be specified.
If the Echo state is ON, then commands and lines of Realtime mode data received by the encoder
are echoed back as they are received. As well, the command or line of data being entered can be
corrected using the Backspace key, before terminating the line with a Carriage Return. The
default value for the Echo state, on power-up, is the setting in the Caption Stream Configuration
menu.
If the Monitor Ratings state is ON, then the Caption module sends to the host computer all
program rating packets (type 0105) that it receives from upstream. The packet sent to the host is
in the following format:
<CTRL-A>P0105{rating}
where {rating} is a 4-character string representing the ASCII-encoded hexadecimal value of the 2
program rating bytes received from upstream. The default value for the Monitor Ratings state, on
power-up, is OFF.
Set Baud Rate
Format: <CTRL-A> I {baud rate} <CR>
This command sets the baud rate of the serial port to the value specified by the {baud rate}
parameter. To set the baud rate to 1200, 2400, 4800 or 9600, the appropriate 4 digit value is
specified. To set the baud rate to 19200, the 3-digit value 192 is specified. The default value for
the baud rate, on power-up or reception of the Reset Encoder command, is the setting selected in
the Serial Port Configuration menu. Note that the Configuration menu allows selection of a wider
range of baud rates than are available with this command.
Vendor and Version Enquiry
Format: <CTRL-A> ? <CR>
This command returns the string “TES9 Caption Encoder Vx” to the host computer, where “x” is
the revision level of the software.