continuous data acquistion

[shivarajkandhasamy]

For our project, after locking, we would like to acquire continuous data for a longer time to look at narrow frequency features. Currently, we can only store 16384 samples, which is not sufficient for cause. Is there a way to get more continuous data by continuously capturing the 16384 samples or by some other means? I tried to use the new DMA option in red Pitya (for example link) along with pyrpl, but they don't seem to work together. If I start the pyRPl and ssh to Red Pitaya to start the DMA acquisition, it doesn't work. But without starting Pyrpl, I can SSH and acquire a longer stream of RF input channels. Let me know if there are options I can explore. Thanks.

[michaelcroquette]

Have you looked at the sampler module ?

[shivarajkandhasamy]

Sorry, it is not clear to me how to use that module for continuous acquisition. I thought there would be gaps between the data acquired through it, as it comes in chunks.

[michaelcroquette]

Ok I guess I read your question to fast. The sampler module can be used to acquire data for a long time with a low and not well define sampling frequency.

Regarding your issue, I guess the two ssh connection are clashing. I took a look at your example, are you doing it the same way ? If so an option could be to not open a second connection but to send the SCPI command using the Pyrpl.rp.ssh connection. Not sure if this would work though.