Model 6220/6221 Reference Manual
Sweeps
4-23
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Sweep status model events
Three status model events are available for monitoring sweep progress, all of
which set bits in the Operation Condition Register (see Section 11 for complete
details on the status model).
summarizes the sweep status bits in the Operation Condition Register.
The Device Sweeping event is set at each point in the sweep, so queries of the
Operation event register (STAT:OPER:EVEN?) will continue to show this bit set
throughout the entire sweep. Note, however, that if you send the query twice while
the sweep is on the same point, the second query will not show the bit set
because the first query cleared it, and the bit will not be reset until the next point in
the sweep.
The Sweep Aborted event occurs whenever a sweep is aborted before being
allowed to finish, and the Sweep Done event occurs after the requested number of
sweeps (SOUR:SWE:COUN or SOUR:DELT:COUN) has completed. For the pur-
poses of these events, Delta and Differential Conductance (Section 5) are also
considered sweeps and will set these events and bits accordingly. Pulse Delta is
not considered a sweep unless you have enabled Pulse Sweeps
(SOUR:PDEL:SWE:STAT ON). Model 6221 Arbitrary waveforms (Section 7) are
not considered sweeps and do not affect these status events.
Table 4-6
Sweep status model bits
Bit
Status event
1
+122 “Sweep done”
2
+123 “Sweep aborted”
3
+124 “Device sweeping”
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