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- Corrected roll-off calculation

pull/36/head
Rune Broberg 2019-10-08 13:49:38 +02:00
rodzic c245cbac87
commit 6e4d3240e8
1 zmienionych plików z 4 dodań i 3 usunięć
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7
NanoVNASaver/Analysis.py
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@ -577,10 +577,11 @@ class BandPassAnalysis(Analysis):
self.upper_six_db_label.setText(NanoVNASaver.formatFrequency(upper_six_db_cutoff_frequency))
upper_six_db_attenuation = NanoVNASaver.gain(self.app.data21[upper_six_db_location])
upper_max_attenuation = NanoVNASaver.gain(self.app.data21[0])
frequency_factor = self.app.data21[0].freq / upper_six_db_cutoff_frequency
upper_max_attenuation = NanoVNASaver.gain(self.app.data21[len(self.app.data21)-1])
frequency_factor = upper_six_db_cutoff_frequency / self.app.data21[len(self.app.data21)-1].freq
upper_attenuation = (upper_max_attenuation - upper_six_db_attenuation)
logger.debug("Measured points: %d Hz and %d Hz", upper_six_db_cutoff_frequency, self.app.data21[0].freq)
logger.debug("Measured points: %d Hz and %d Hz", upper_six_db_cutoff_frequency,
self.app.data21[len(self.app.data21)-1].freq)
logger.debug("%d dB over %f factor", upper_attenuation, frequency_factor)
octave_attenuation = upper_attenuation / (math.log10(frequency_factor) / math.log10(2))
self.upper_db_per_octave_label.setText(str(round(octave_attenuation, 3)) + " dB / octave")