HP 81101A Reference Manual page 79

The above message is an example of a customized description. Generic
descriptions are available in the SCPI 1995 Command Reference, items
21.8.4 to 21.8.11.
For more detailed information in the 81110A error.
Send ":SYST:WARN:STR?". Alternatively, the HELP key shows the
current errors and warnings and their description on the instruments
display.
Command
:SYST:KEY
Long
:SYSTem:KEY
Form Set & Query
Parameter
Numeric
Parameter suffix
No suffix allowed
*RST value
–1
Specified limit
No.
–1
0
1
2
3
4
5
6
7
8
9
10
Key Description
No key pressed (Query only)
DATA ENTRY 0
DATA ENTRY 1
DATA ENTRY 2
DATA ENTRY 3
DATA ENTRY 4
DATA ENTRY 5
DATA ENTRY 6
DATA ENTRY 7
DATA ENTRY 8
DATA ENTRY 9
DATA ENTRY .
Programming Reference
SCPI Instrument Command List
79