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In our lab, we have several 2410 SMUs that we drive using a "home-brew" software. With our most recent unit (bought last year, serial #1284998), I noticed a strange behaviour: it generates more sweep cycles than requested. At the beginning, it was doing two cycles, and now it is sweeping continuously, whatever we try (reboot, return to factory defaults...). This is not observed to a slightly older unit (approx 2 years old serial #1239497), which sweeps fine (i.e only once). Both units run the C30 firmware (in the menu, it says "Rev C30 Mar 17 2006... SCPI 1996.0 V:A02 A:H D:F").
The series of commands sent to the SMU is as follows:
Then, I run the sweep with the following commands:
Note that if I transfer the configuration via GPIB, but then run the sweep via the front panel, only one sweep cycle occurs.
Any idea what could cause such a difference in behaviour between 2410s? By the way, a difference I didn't think about is that the "faulty" SMU has an interlock cable connected (DB9 socket), while it is not configured for the other SMUs...
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I run your SCPI Command codes and only get one sweep.
This was performed on a C32 firmware revision.
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