"Jumps" in TOA time walk

[andpet1324]

Describe the bug
We expect a smooth exponential decrease in the TOA time walk. We can see some jumps on almost all channels, shown in the following figure:

The following figure is showing how the effect looks like in one channel:

The shape of the jump is pretty consistent over channels, but they vary in length and size.

Potential Causes and Things to Check

• TRIM_TOA alignment missing.
• All data is taken at the timepoint of 25 ns. How does it look at different timepoints?
• Does the noise in TOA relate to the position and size of these jumps?

To Reproduce
Steps to reproduce the behavior:
Run TASKS.CHANNEL_WISE_SCAN in pftool.
Analyze the produced csv file with ana/toa/toa_time_walk.py.

Environment:

• ZCU: Lund
• pflib version: commit d7ee7b6