If FETC? is sent without making a single measurement after resetting the PAT-T (using *RST) or after switching from local mode (panel operation) to remote mode, an SCPI error (-230,"Data corrupt or stale") occurs. This is because there is no valid measured data that is held. Be sure to use this command after the INIT or MEAS command.
Returns the measured value of the voltage output in the NR3 form in response to FETC:VOLT?.
If the measurement is not complete, the response data is generated after the measurement for the FETC:VOLT query is complete.