Issue with Signal Tap dropping data samples throughout capture

Windows isn't very good at guaranteed throughput real time operations unless the drivers and apps are written very carefully. One thing that can help is minimizing the amount of background stuff going on. Virus checkers are some of the worst offenders, followed by crapware/adware/spyware.

For best results do your data collection with a pristine PC:

1) Start with a fresh windows install, use a windows CD, not a vendor CD preloaded with crapware.

2) Never enable automatic updates or checking for updates.

3) Don't connect the PC to the internet for any reason.

4) Use only passive virus scans. Active scans will cause data losses as checks are done in the background.

5) Transfer files with USB sticks, or SD cards, or a network that has no connection to the internet. Virus check all media before it is inserted into the pristine PC.