Hey, this LTI DSP Workbench was a brilliant idea! We promised we’d run the application and report about the experience. (LTI DSP … Linear Time-Invariant Digital Signal Processing)
We are speaking about the application which models a physical system, turning Red Pitaya into almost any linear system that can be included into a measuring and control circuitry.
The test setup was a very straight forward one. The idea was to generate a signal, feed it into the application and monitor the output. So in addition to Red Pitaya running the LTI DSC Workbench we also needed a generator and say, oscilloscope … well, the second Red Pitaya was at hand.
Here is also a photo of the actual setup.
Hereis the generated (red) and returned (blue) signal. We see some latency, which certainly will be reduced if the application is ported to the FPGA, and some minor transients we noticed in the signal. About the latter – we suspect it was the FIFO buffer, but consider it cosmetics anyhow.
We continued with other configurations and the application worked just fine.
On the Red Pitaya forum there is actually a topic about this application. A transfer function of Chebyshev low-pass filter is shown there by the author as an example:
In short – as was previously said – it not only a great idea but also great implementation!
Hey DashPi – much respect to you!