HP E8402A User And Service Manual page 201

Error Conditions
Reset Condition
Related
Commands
Chapter 4
The following table lists the most common error conditions and causes. Error
numbers and corresponding messages can be found using SYSTem:ERRor? query.
Number Message
-224 "Illegal Parameter"
-109 "Missing Parameter"
-221 "Settings Conflict"
Calibration is not affected by *RST.
CALibration:ALL?
Probable Cause
The <supply> parameter was not correct.
The <supply> parameter was omitted.
The mainframe's power is off.
Calibrating and Verifying Performance 203