Comm Port Control Commands (Stream Mode); Show Port Permission Maps - evertz 8084 Instruction Manual

4.7

COMM PORT CONTROL COMMANDS (STREAM MODE)

SERIAL PROTOCOL
Models 8084/8084AD/8085 Closed Caption Encoder Manual
The 8084 and 8084AD can allow simultaneous access by all the
communication ports to the caption keyers.
equivalent of multiple caption 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 caption 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 caption
encoder maintains a list of which ports are active for each data type.
Normally, the various keyer commands (such as ^A2, ^A3, ^A6, ^A7) will
set and clear the active status automatically.
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 ^A3<cr>
or ^A3 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 ^A3 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>
Example result:
Permission Map
Revision 1.6.6
This can be the effective
The permission list is
CF1 captions field 1
CF2 captions field 2
TF1 text field 1
TF2 text field 2
XDS extended data services
To obtain maximum
The
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