Redpitaya Forum

Hi all,

Can you transform the Redpitaya into a two-port VNA by buying two VNA modules ?

Do you know if the app that's already developed can handle this possibility ?

How would this affect the calibration ? We would probably need a calibrated through on top of the rest.

Thanks for developing this great tool !

Do you know if the app that's already developed can handle this possibility ?

The FPGA code is already connected to both inputs and outputs. So I think it can be used as is for the 2-port configuration.

The server code running on the Red Pitaya board has all the controls for two outputs and reads and transmits the I/Q samples from both inputs. So it can also be used as is.

The Python client analyzes the I/Q samples only from the first input. It has no code for 2-port calibration and measurements. While adding code for 2-port calibration and measurements should be relatively easy, changing the graphical interface would likely require a lot of work.

If you don't need a graphical interface and you use Matlab, 2-port calibration and measurements can be easily added to the example at the following link:
https://github.com/pavel-demin/red-pita ... tlab/vna.m

Definitely not possible at this point but why do you ask?