Problem with PXI SMU 4132

I have observed 4132 PXI is sometimes load dependent. We were testing a specific device
which is part of the bi-directional and when we forced a current through the device in the negative sense of the whole
current is not available through a device (i.e.) when I force - 1mA through the device, I would see a 1mA through the device.
However what we observe, it's only 0.5mA is available through the device. This happens only in the negative sense.
2.) I have observed this behavior for a specific device. We tested the same device on keithley 2611 and they
measure well. In my view, that the problem must be with the EMS.
How much output impedance is present in this SMU? How can this problem be solved?


Tags: NI Products

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