
SCE-492 10
Operating Instructions
The SCE-492 for the most part is plug and play, should the need arise there are
menus to allow you to change the settings. You should familiarize yourself with the
Information Display.All four communication ports are always active so you will not have
to turn them on or off. The default serial ports protocol is, a baud rate of 1200, 8 bits,
parity none, stop bits 1, and flow control none. Optional external serial modems are
available.
The SCE-492 will encode captions according to the preferred method of the
SMPTE 334 standard into a caption data packet CDP. This packet contains the CDP
header, CDP closed caption data section which includes CEA-608 data and CEA-708
data, closed caption service information section (Optional), and a CDP footer. The unit
will receive CEA-608 data and convert that to CEA-708 data then encode both of them
into the CDP. When encoding, any pre-existing CEA-708 caption data packets will be
deleted.
For basic encoding the commands are the same as any other Link encoder like
the PCE-845. The difference in the commands is in the fields. The CDP requires that
both fields are present even if you are just encoding field 1, field 2 will have to be re-
encoded or nulled (zeroes). Field encoding control is based on a controlling port so
field 1 can be encoded by one port and field 2 can be encoded by another port. This
would allow you to encode CEA-608 CC1, CEA-708 S1, CEA-608 CC3, and CEA-708
S2 at the same time using two ports.
Each field controlling port is automatically assigned to the last port that it
received a field initialization command from, ignoring any other field data from other
port(s) until the next port receives that field initialization. Up to four captioners can be
connected and swap control of the encoder just by initializing it. This could be useful
when doing live captioning for long periods of time.
A new mode has been added called “ready”, this just means the unit is ready to
receive data thru its selected port and when it receives a CEA-608 captioning command
it begins encoding. This way you could have voice recognition captioning software
sending data to one port and a teleprompter set on another port. If your teleprompter is
set up correctly, when your teleprompter starts the SCE-492 will start encoding the
teleprompter data and when the teleprompter stops the SCE-492 would start encoding
the voice recognition data.
A decoder has been added to one of the outputs for quality monitoring. The
decoder also has the ability to send caption data out (data recovery) one of its four
ports. A new mode has been added to data recovery called Alternate codes. In this
mode the unit sends out an alternate character instead of special character also sends
out a space, a carriage return, and a line feed for new lines instead of caption codes.
This is done to make the recovered data more legible.