Redpitaya Forum

Hi everyone,
I want to use redpitaya to generate a chirp signal from 10KHz to 50KHz,

The way I think of this is to use the AWG function,
but unfortunately, the time resolution is not enough.

If I want the sweep time to be 100ms,
then the time resolution will be 100ms/16384 ~ 6us,
to the 10KHz side it will roughly have 100/6 ~ 17 points/cycle,
still can be called a good sine wave.
But for 50KHz the points drop to only 20/6 ~ 3 points/cycle,
which is very bad

So my question is, is there any possible to extend the buffer size, say, 1M points?
Any help will be appreciated!

Hello, can someone help me?

Hi,

you'd need to implement a way for the FPGA to access system RAM for that many data to be stored.
Currently all data is buffered into the FPGA BRAM which has a capacity for all modules combined of 2 MB. What you'd like to do is to store 14 MB.

Pavel demin has a working prototype for this. Take a look at this thread.