[hpsdr] PowerSDR mRX-FFT calibration issue v3.0.7

[Warren C. Pratt]

Dale,

In addition to Willi's suggestion of tweaking the calibration factor, you
should use the largest FFT sizes on the display to get the best frequency
calibration.  The calibration function looks for the peak value in the
display FFT output.  With larger FFT sizes, you have more resolution in
frequency.  Using a lower sample rate will also improve accuracy.

73,
Warren  NR0V


***** High Performance Software Defined Radio Discussion List *****

Hardware: original TAPR Mercury/Penelope/Atlas combo, along with Metis

When I run the General > Calibration at 15 MHz against WWV, the resulting
calibration is about 9 Hz off, as determined both by my ears and the
Phase2 display when I adjust the main tuning for zero-beat in DSB mode.

Is there a way to further tweak this?

Thanks,
Dale WA8SRA



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