Weird signal processing output with no peaks and a double track pattern

[brettviren]

tl;dr: you need to flip the depo charge sign.

In particular, larsoft and WCT assume different electron sign conventions for "depos". Check if the depo source component you use has a scale or similar configuration parameter and flip its sign.

Details:

You may see something like this simulation output of U plane ("orig" data tier). Wrong:

and it's corresponding SP output ("gauss" data tier). Wrong:

The SP output is obviously weird. Less obvious is that the "orig" waveforms start out negative-going (time is from left to right). Not shown here but the corresponding wrong sign "orig" for "W" is seen to be entirely negative.

To be correct, bipolar "orig" should start out positive and unipolar "orig" should be entirely positive.

Correct U orig and gauss:

Correct W orig and gauss:

[brettviren]

Not a bug per se, just a reminder since I seem able to keep forgetting this convention difference.