Perhaps! Maybe just an imperfect connection somewhere.
in test PD is near 0 volts for blank: Blank signal too high: mean_signal=0.16571198797839162 > 0.035
This might be okay anyways? I’ve made some simple improvements to this test in the next release that will be easier to diagnose issues. Simply: we don’t use the REF, which as we know, if very small, can blow up the signal even if the [90 deg] signal is within bounds.