Why does the raw trigger data look like this:
![raw_trigger_data.png](./download/file.php?id=104&sid=b5f94a45908b70a17ea2bfd38089f1e5)
- raw_trigger_data.png (8.04 KiB) Viewed 5101 times
Close up showing expected shape of trigger with unexpected trigger values (and one of the intermittent huge negative spikes):
![closeup.png](./download/file.php?id=105&sid=b5f94a45908b70a17ea2bfd38089f1e5)
- closeup.png (13.7 KiB) Viewed 5101 times
I would expect an integer value corresponding to the actual active pins on the parallel port connection. So two questions, what is the meaning of the huge negative floating point numbers and why the huge negative spikes every 5 seconds or so?