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SERIAL PROTOCOL
8083XDS-AD Analog and SD-SDI XDS Encoder
dt
Data Type
ws
Word size
par
Parity
tz
Time zone
ovr
Override
4.2.3
Flow Control Handshaking
When the encoder's input buffer is nearly full the device sends an XOFF for
each character received. If the XDS software continues to send data and
the input buffer fills completely the XDS encoder will show the message
BUFFER OVERFLOW on the front panel display. When the input buffer has
overflowed some data may be lost. When the input buffer is nearly empty
the XDS encoder will transmit an XON character.
The 8083XDS-AD also uses hardware flow control to prevent lost data.
The unit will turn off the RS232 RTS signal when the buffer is nearly full,
and will turn RTS on when the input buffer is nearly empty.
4.2.4
Break Handling
A break character can be sent to the XDS encoder to cause the content of
the associated input buffer to be discarded.
circumvent a backlog of data input, and regain immediate control of the
encoder. The best way to reset a communications port is to send a break
followed by a Control-F – Control-F command.
4.2.5
Command Responses and Error Messages
When the 8083XDS-AD accepts any of the Control-A commands it will
respond by sending back an asterisk '*' prompt with the following
exceptions:
•
When in real time mode it will respond with a colon ':' prompt.
•
When an article is being defined, it will respond with a '>'.
COMMAND ERROR will be displayed on the front panel if the unit receives a
command from a serial control port that it does not understand.
It will also respond by sending back an error code 'E1'.
Revision 1.0.2
CF1
captions field 1
CF2
captions field 2
TF1
text field 1
TF2
text field 2
XDS
extended data services
7
7 bit data word
8
bit data word
O
Odd parity
E
even parity
N
no parity
0:00 to 23:59 time zone hours and minutes
relative to UTC
O
forces override
This allows the user to
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