HD1490 HD Encoder Frame Card
To send the encoder commands through the serial input ports, connect
a standard 9-pin straight cable between your PC’s serial port and one of
the DB9 connectors marked P1 or P2. You can now send commands to
the encoder, from your PC, using a communications application such as
HyperTerminal, which is bundled with most versions of Windows. The
most basic Smart Encoder command, useful for checking the operation
of your communication setup, is
<CTRL+A>?<ENTER>.
If your setup
is working correctly, the Encoder will respond with its model name,
firmware version, and serial number. If you have trouble communicat-
ing using HyperTerminal, always check to make sure that the settings
in the Port Settings menu in HyperTerminal match the settings for the
Encoder port you are connecting to.
In this manual, Encoder commands will be distinguished from other text
by use of a bold font. Optional parameters will be enclosed in square
brackets. Possible parameter values and default settings will be de-
scribed in text or bullet points after the command is introduced.
3.4.1
Local Entry Modes
Caption data entered into the Encoder must be associated with a partic-
ular Line 21 Data Channel, NTSC field, or HD caption Service. The table
below identifies the commonly used NTSC (SD) Line 21 data channels.
Data Channel
Description
CC1
Primary language Closed Captioning in
Field 1
CC2
Secondary language Closed Captioning in
Field 1
CC3
Secondary language Closed Captioning in
Field 2
T1, T2
Field 1 Text services, including Interactive
TV URLs
XDS
Extended Data Services such as Program
Rating, Type and Length. Appears in Field
2.
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