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HD9084 HDTV Caption Encoder Manual
SERIAL CONTROL PROTOCOL Page 4-7
4.3.2. Reset Encoder
This command immediately clears the input and output data queues and resets the HD9084 to the
Transparent State in Field 1 and Field 2. Article and XDS output queues are not reset by this
command. They must be explicitly reset by using the queue articles and queue XDS commands. (See
sections 4.4.4 and 4.5.3.) To reset only a particular communications port, refer to the Reset Port (^Ar)
command in section 4.6.5.
Command: ^F^F<cr>
Default: none
4.3.3. Set Output Line
The normal line for caption information is line 21 in SD-SDI. This command allows the HD9084 to
output caption information on different line numbers. This command also changes the line number
used by the decoder.
Command: ^AE<sp>Lln<cr>
Default: ^AE<sp>L21<cr> for SD-SDI systems
The parameter ln specifies the line number that caption information will be output on. The permitted
values of parameter ln are 11 to 25.
Examples: ^AE<cr> Reset to default.
^AE<sp>L20<cr> Set for line 20.
^AE<sp>?<cr> Show current line.
4.3.4. Monitoring Line 21 Data on the Serial Port
This command allows the HD9084 to extract line 21 information from the input or output video and send
it out the serial port. Enter a ^G to end monitor mode.
Command: ^A5<sp>fx<sp>o<cr>
The parameter ‘fx’ specifies the field that data will be extracted from.
The parameter ‘o’ specifies that the output data will be monitored.
Example: ^A5<sp>F1<cr> Monitor Field 1 Input.
^A5<sp>F2<sp>O<cr> Monitor Field 2 Output.
4.3.5. Controlling the Caption Decoder
This command allows the unit to display line 21 information on the built-in caption decoder.
Command: ^AM<sp>dc<cr> Decode a specific channel.
or ^AM<sp>OFF<cr> Turn off Decoder off.
The parameter ‘dc’ specifies the data channel that will be decoded and displayed. In addition to the
dc
values shown in section 4.2.2, the following additional values are supported only for this command.
USO
RESTRITO