HD491 Smart Encoder
21 Copyright © 2000-2014 EEG Enterprises, Inc.
All Rights Reserved.
Begin RealTime Mode
:
<CTRL+A>2 [
Channel
] [
Rollup
]
[b
Base
] <ENTER>
End
RealTime Mode
: <CTRL+C>
Displayed as RTCAP. When a port enters the command to begin
RealTime mode, text entered through that port will be encoded into a
rollup caption display and replace upstream caption data for the specified
channel. The 491 Encoder will automatically create all necessary control
and formatting codes. When RealTime mode is ended, the channel will
return to upstream Regeneration.
Data entered in RealTime must be in ASCII text format with a carriage
return (0Dh or <ENTER>) at the end of each line of data. Because a line
of data is processed only upon receipt of a carriage return, text may be
edited by use of a backspace (08h or <BACKSPACE>) at any time before
the carriage return.
The input text may be formatted to fit on 32 character lines by sending a
carriage return at word boundaries approaching the 32 character limit. If
sufficient data to fill a line is not available within a reasonable amount of
time, a carriage return should be sent to ensure timeliness for the queued
data.
Channel
specifies which NTSC caption channel the ASCII data that
will be entered is intended for. Enter CC1 for primary language
captioning or CC3 for secondary language captioning. If no parameter
is entered, CC1 will be assumed.
Rollup
sets the number of rows in the rollup caption display that will
be created. Possible values are 2, 3, and 4. If no setting is entered, 3
will be assumed.
Base
sets the row from which the caption display will begin rolling
up. The parameter value must be entered with a leading “b”. Possible
values range from b2 (top of the screen) to b15 (bottom of the screen).
The default value is b15. Always set the Base value at least as large
as the number of rows in the rollup display, or else the uppermost
row(s) of the display will not be visible.
