Lena/Oct 2016: Difference between revisions

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=== Discrepancy between the expected and measured DAQ noise ===
 
It seems like the noise we are measuring is somewhat lower than what our bit depth suggests. With 16 bit ADC and downsampling from 500 ksps to 180 sps, we should have effective 21.8 bit resolution. The DAC range is ±10V and the magnetometer gain is 1026 μV/fT, so the resolution should be 0.62 fT at DC. The noise on the PSD goes below 0.1 fT:
 
[[File:MagRun2PSN 2016.09.27 R20N020304 Chan1Y.png|300px]]
 
=== Adding an anti-aliasing filter to the polarimeter ===

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