Hi Zhou,

Not sure about your fft.yml. I don't use RFNOC, just straight fosphor from
the shell:)
Log2(1024) = 10. that part is right, have you tried MIN_FFT_SIZE_LOG2 10?
or simple FFT_SIZE_LOG2 10 to see if they work?
Maybe smn else with  more RFNOC experience can help:)

BR
Nikos

On Mon, Jun 23, 2025 at 11:10 AM <zhiwen_z...@seu.edu.cn> wrote:

> Hi Nikos,
>
> Thank you for responding!
>
> I think it’s just with Fosphor since streaming from DUC works fine.
> How to ensure that at least 1024 complex samples is fed into the Fosphor
> module? I’ve set the FFT size to 1024, and it still does not work.
> Does it have something to do with my FFT set up? Since I’ve changed the
> old ‘fft_1x64.yml’ to 'fft.yml', is there any additional parameters
> required?
> My current FFT config:
>
>   fft_a:
>
>     block_desc: 'fft.yml'
>
>     parameters:
>
>       MAX_FFT_SIZE_LOG2: 10
>
>
>   fft_b:
>
>     block_desc: 'fft.yml'
>
>     parameters:
>
>       MAX_FFT_SIZE_LOG2: 10
>
>
> Zhouzhiwen
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