Agilent Technologies EPM-P Series Programming Manual page 185

Measurement Commands
FETCh[1]|2|3|4[:SCALar][:POWer:AC]:RATio:RELative? [<expected_value>[,<resolution>[,<source
list>]]]
• 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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