kopia lustrzana https://github.com/NanoVNA-Saver/nanovna-saver
58 wiersze
2.0 KiB
Python
58 wiersze
2.0 KiB
Python
# NanoVNASaver
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#
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# A python program to view and export Touchstone data from a NanoVNA
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# Copyright (C) 2019, 2020 Rune B. Broberg
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# Copyright (C) 2020 NanoVNA-Saver Authors
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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import logging
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import math
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from PyQt5 import QtWidgets
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logger = logging.getLogger(__name__)
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class Analysis:
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_widget = None
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def __init__(self, app: QtWidgets.QWidget):
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self.app = app
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def widget(self) -> QtWidgets.QWidget:
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return self._widget
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def runAnalysis(self):
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pass
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def reset(self):
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pass
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def calculateRolloff(self, location1, location2):
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if location1 == location2:
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return 0, 0
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frequency1 = self.app.data21[location1].freq
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frequency2 = self.app.data21[location2].freq
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gain1 = self.app.data21[location1].gain
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gain2 = self.app.data21[location2].gain
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frequency_factor = frequency2 / frequency1
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if frequency_factor < 1:
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frequency_factor = 1 / frequency_factor
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attenuation = abs(gain1 - gain2)
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logger.debug("Measured points: %d Hz and %d Hz", frequency1, frequency2)
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logger.debug("%f dB over %f factor", attenuation, frequency_factor)
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octave_attenuation = attenuation / (math.log10(frequency_factor) / math.log10(2))
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decade_attenuation = attenuation / math.log10(frequency_factor)
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return octave_attenuation, decade_attenuation
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