Comtech EF Data UT-4500 Series - Manual (Page 80)

UT4500 Series Up Converter MN/UT4500.IOM
Remote Control Revision 2
62
5.5.5 E
RROR
R
ESPONSE
If a converter 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']
5.5.6 E
ND
O
F
M
ESSAGE
End of message strings were devised in such a way that an orderly screen presentation
would result when converters are controlled by simple ASCII terminals.
5.5.6.1 C
OMMAND
E
NDING
The end of message for a command is a carriage return. For this document 'cr' is used for
the carriage return.
Example:
5.5.6.2 R
ESPONSE
E
NDING
End of message for a response is a carriage return, line feed and a bracket: 'cr''lf'].
Example: >DEV/COM_'cr''lf']