Comtech EF Data XPA-200 - Manual (Page 59)

XPA200-7984-I-OPT1, X-Band SSPA Remote Control Remote Control
XPA200-7984-I-OPT1, Rev.2 5-7
to the Command.
Example: >DEV/COM_xxx'cr''lf']
5.7.5 Error Response
If a SSPA cannot execute a Command or detects a protocol
violation, an error response is generated. An error is flagged
by changing the "/" command designator in the response to a "?".
Following the "?" error symbol are two characters which are
unique error symbols useful for computer analysis. The two error
symbols are followed by a text string explaining the error for
the convenience of a human operator. For this document ER is
used for the generic case examples response.
Example: >DEV?COM ER Error Message 'cr''lf']
5.7.6 End Of Message
End of message strings were devised in such a way that an
orderly screen presentation would result when SSPAs are
controlled by simple ASCII terminals.
5.7.6.1 Command Ending
The end of message for a command is a carriage return. For
this document 'cr' is used for the carriage return.
Example:
5.7.6.2 Response Ending
End of message for a response is a carriage return, line
feed and a bracket: 'cr''lf'].
Example: >DEV/COM'cr''lf']