Can't view AD2 WF acquisition (200 KHz samples) finer than 100 msec/div

[Bruce Boyes]

On a recent field trip we captured multiple WaveForm and AD2 scope acquisition of 10 million samples at 200 KHz (so 50 seconds acq size), and the sample period is 5 uSec. Now I want to analyze that data. One acq I can zoom in as fine as I wish, down to seeing the 5 usec sample points. Another will not let me view at finer than 100 msec/div! When I try, it just wraps/jumps to a Base of 2.562 s/div. I hope that description makes sense. I can have two acqs loaded (both show in the buffer list). Each is about 60 MB in size. One I can zoom in fine and the other I cannot.

Why? And what can I do about this?

[Bruce Boyes]

Here are some screen captures. The top one shows I can zoom in as much as I wish. Bottom one is the max I can zoom, if I scroll more it wraps to a Base of 2.762 s/div. If I try to select 50 msec/div in the Base pulldown it wraps to 2.762 s/div.

I closed the app and restarted. No better.

Here the second buffer lets me zoom in as expected.

Below is the max I can zoom in on the first buffer.

[attila]

Hi @Bruce Boyes

To prevent this jump set the acquisition mode to Record (or Repeated)

 

[Bruce Boyes]

Weird... but that works. Thanks! Since I am just viewing a capture with no AD2 attached, it's odd the capture modes would have any effect. Should I report this as a bug on Github?

[JColvin]

Hi @Bruce Boyes,

The WaveForms software is not on Github or anything like that, but you have done better than that by mentioning this directly to the WaveForms developer himself (attila, not me).

Thanks,
JColvin