AD2 Record Mode frequency can't be set

[sam81]

Hi all,

I've been writing a software defined instrument in python (with the AD2), and I've been struggling to properly use the "record" streaming acquisition mode. To confirm that it wasn't my code, I changed the acquisition rate (in Hz) to 100 and samples to 1000 in the example analogInRecord.py. Since the number of samples is ten times the acquisition rate, I expect it to stream for ten seconds. However, it only seems to stream for a second or two. What am I doing wrong?

 

Best,

SamAD3analogIn_Record.py

AD3analogIn_Record.py

[attila]

Hi @sam81

The 'record' is for long data streaming captures.
Up to device buffer size captures use the 'single' mode, see AnalogIn_Acquisition.py AnalogIn_Trigger.py ... examples

[Sam S.]

Yeah -- I've been using the single acquisition mode already. I'm trying to write a strip-chart style tool, which streams data directly from the AD2 instead of storing it in the capture buffer first. I chose 100Hz and 1000 samples as an easy consistency test, but I want to use this method to capture millions of samples further down the line. Is it possible to control the capture rate when using the record feature?

[attila]

Hi @Sam S.

The latest beta version fixes the low sample count record bug.