Using doppler on GQRX raw files about doppler

[andresv]

Haven't used it quite some time. However could you share your gqrx_20220804_154702_137100000_80000_fc.raw maybe I have a chance to look into it.

[andresv]

Oh my, something must be horribly wrong. It spiked my interest. I try to allocate time for investigating. Thanks for clear example.

[RYNEQ]

Haven't used it quite some time. However could you share your gqrx_20220804_154702_137100000_80000_fc.raw maybe I have a chance to look into it.

Thank you,
Here is the gqrx_20220804_154702_137100000_80000_fc.raw:
https://mega.nz/file/E2BjBICR#QTBmv8v_jh7lXGBEb4FaRhU8rdW--iJi12RJ_PJWC_M

I also tried to apply a zero const shift to it and again got the same result.

I tried to investigate output and it seems there is some overflow and clipping
I recorded another signal (137.1 MHz with sample rate 144000) file and I applied a const 50Hz shift like this:

cat gqrx_20220806_143821_137100000_144000_fc.raw |doppler const -i f32 -o f32 -s 144000 --shift 50 > gqrx_20220806_143821_137100000_144000_fc_f32_shifted50.raw

Then I tried to compare time and frequency domain of original and result file, and I see lots of clippings:

Spectrum:

Time Domain: