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annotate plotss.py @ 84:4b4ae555067b

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Use RMS detector and fix the sweep time for more accuracy. Add links to app notes discussing theory. Run forever without pause and print a summary on ctrl-c
author Daniel O'Connor <doconnor@gsoft.com.au>
date Thu, 03 Oct 2024 08:57:10 +0930
parents 91b476ebc0f2
children
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e80c2ff5fa87 Add program to plot data files from sitesurvey.py
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1 #!/usr/bin/env python
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3 import datafile
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4 import exceptions
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5 import numpy
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6 import pylab
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7 import sys
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9 def doplot(fname):
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10 dfile = datafile.DataFile(fname)
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12 xdata = dfile.freqs / 1e6
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13 ydata = dfile.powers
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14 pylab.title("Tag \'" + dfile['TAG'] + "\' at " + dfile['TIMESTAMP'])
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15 pylab.xlabel("Frequency (MHz)")
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16 pylab.ylabel("Level (dBm)")
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17 annstr = "FStart: %.2f MHz\nFStop: %.2f MHz\nPoints: %d" % (
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18 float(dfile['FSTART']) / 1e6,
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19 float(dfile['FSTOP']) / 1e6,
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20 len(xdata))
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21 pylab.annotate(annstr, xy=(5, -40), xycoords='axes points')
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23 annstr = "Video BW: %.1f kHz\nResol. BW: %.1f kHz\nAttenuation: %.1f dB\nRef Level: %.1f dBm" % (
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24 float(dfile['VIDBW']) / 1e3,
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25 float(dfile['RESBW']) / 1e3,
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26 float(dfile['ATTEN']),
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27 float(dfile['REFLEV']))
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28 pylab.annotate(annstr, xy=(-140, -55), xycoords='axes points')
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29 pylab.grid(True)
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30 pylab.plot(xdata, ydata, linestyle='solid', marker='.')
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31 pylab.show()
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33 if __name__ == "__main__":
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34 if len(sys.argv) < 2:
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35 print("Need at least one file to plot")
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36 sys.exit(1)
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38 for fn in sys.argv[1:]:
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39 doplot(fn)
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