Agilent Technologies EPM-P Series Programming Manual page 175

Measurement Commands
FETCh[1]|2|3|4[:SCALar][:POWer:AC]:RELative? [<expected_value>[,<resolution>[,<source list>]]]
Error Messages
• If the last measurement is not valid error -230, "Data corrupt or stale"
occurs. A measurement is valid after it has been initiated. It becomes
invalid when either a reset occurs or any measurement parameter, for
example frequency, is changed.
• If the expected_value and resolution parameters are not the same as
the current expected value and resolution settings on the specified
window, error -221, "Settings conflict" occurs.
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EPM-P Series Power Meters Programming Guide