Re: [kgksdr] Graphical display nonlinearity in frequency response
- aleman66 wrote:
> I made some test with a hf signal generator to check the dynamic range.Hi, this isn't a problem with the graphics card, it's more with the FFT
> The problem occurs, when i tune the signal generator over the audio
> frequency range of the sound card. The graphic display shows level
> differences of 10 - 20 dB. The s-meter, set to dBm readout shows
> always the correct, stable value.
> Maybe this is just a problem of the graphic card resolution, i don´t
> know. I am using the onboard geforce 6100 with 1024x768.
and the way the signal is spread across bins. The effect could be
minimised, but that would require more processing power and I try to
avoid that as it's frequently an issue for people :-)
- thanks for your explaination. I know that fft algorithm takes some
calculation time. At least i am shure now that it is not caused by a
wrong setup on my hardware.