Calculating PXIe-4145 SMU Resolution

[sam.broyles]

I am trying to calculate the resolution of my PXIe-4145 4CH Precision SMU, but Figure 2 in the PXIe-4145 Spec Sheet appears to have inconsistent labels on the x-axis. If all labels were in msec (not mixed usec/msec), it would map to a consistent logarithmic scale as the graph implies.

aperture (sec)	resolution (ppm)	notes
0.010000000	1	if graph didn't curve
0.001000000	10
0.000100000	100	incorrectly labeled as 0.1 usec
0.000010000	1000	incorrectly labeled as 0.01 usec
0.000001667	6000	I think this is the max sample rate of 600kS/sec
0.000001000	10000	if graph continued

link to spec sheet:

https://www.ni.com/docs/en-US/bundle/pxie-4145-specs/page/specs.html#GUID-D04476BC-55C8-4CB8-9876-A9...

[ChrisR. · Accepted solution]

Yes, you're correct; the X-axis labels should be 1µ, 10µ, 100µ, 1m, 10m, and 100m.  Thanks for pointing this out.

[ChristophersonJ]

Hey Sam, 

Thank you for bringing this to our attention. 

I've filed a Corrective Action Request (CAR) to fix this in the 4145 specs (and also the 4144) specs.

Cheers, 

Chris J.

Product Support Engineer

NI