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8083XDS-AD Analog and SD-SDI XDS Encoder
4.7
COMM PORT CONTROL COMMANDS (STREAM MODE)
Page 4-22
The 8083XDS-AD can allow simultaneous access by all the communication
ports to the keyers. This can be the effective equivalent of multiple XDS
encoders, linked in series. By using a single video keyer, these encoder
models provide the added advantage of minimizing the delays and the
impact on the video quality.
Several commands are provided in order to prevent data conflicts and to
allow the user to control which ports can affect the data.
The XDS encoder maintains a permission list that indicates which ports will
be allowed to alter various kinds of data. The permissions for each port
can be set from the front panel menus (see section 3.3.2) or they may be
set from the communication control ports.
maintained in non-volatile memory. The data types are denoted as follows:
Data Type
When multiple ports are permitted access to a particular data type conflicts
will be resolved on a "first come, first served" basis. The XDS encoder
maintains a list of which ports are active for each data type.
Normally, the various keyer commands (such as ^A6, ^A7) will set and
clear the active status automatically. To obtain maximum compatibility with
existing software, these commands will exhibit the following special
behavior:
If a port does not have permission for the full field 1, but does have
permission for the captions in field 1, then the command will not be
denied, but will revert to the C1 form of the command.
For example, if Port A has permission for CF1 only, and a ^A6<cr>
or ^A6 F1<cr> is issued, then although Port A does not have
permission for the full field 1, the command will not be rejected.
Instead, the command will be treated as though ^A6 C1<cr> had
been sent.
4.7.1 Show Port Permission Maps
This command will report the permission map for each port.
permission map controls what data types a port is allowed to become
active in. (e.g., captions field 1, text field 2, XDS, etc.)
Command:
^AQ<cr>
Revision 1.0.2
The permission list is
CF1
captions field 1
CF2
captions field 2
TF1
text field 1
TF2
text field 2
XDS
extended data services
SERIAL PROTOCOL
The
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