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add time domain reflectmetry

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TT 2019-08-27 22:20:06 +09:00
parent 48850609fb
commit 1c6a8a2cd3
1 changed files with 18 additions and 1 deletions
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19
python/nanovna.py
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@ -237,6 +237,18 @@ class NanoVNA:
ax.set_ylim((0,1)) ax.set_ylim((0,1))
ax.plot(np.angle(x), np.abs(x)) ax.plot(np.angle(x), np.abs(x))
def tdr(self, x):
pl.grid(True)
window = np.blackman(len(x))
NFFT = 256
td = np.abs(np.fft.ifft(window * x, NFFT))
time = 1 / (self.frequencies[1] - self.frequencies[0])
t_axis = np.linspace(0, time, NFFT)
pl.plot(t_axis, td)
pl.xlim(0, time)
pl.xlabel("time (s)")
pl.ylabel("magnitude")
def smithd3(self, x): def smithd3(self, x):
import mpld3 import mpld3
import twoport as tp import twoport as tp
@ -313,6 +325,9 @@ if __name__ == '__main__':
parser.add_option("-U", "--unwrapphase", dest="unwrapphase", parser.add_option("-U", "--unwrapphase", dest="unwrapphase",
action="store_true", default=False, action="store_true", default=False,
help="plot unwrapped phase", metavar="UNWRAPPHASE") help="plot unwrapped phase", metavar="UNWRAPPHASE")
parser.add_option("-T", "--timedomain", dest="tdr",
action="store_true", default=False,
help="plot TDR", metavar="TDR")
parser.add_option("-c", "--scan", dest="scan", parser.add_option("-c", "--scan", dest="scan",
action="store_true", default=False, action="store_true", default=False,
help="scan by script", metavar="SCAN") help="scan by script", metavar="SCAN")
@ -364,7 +379,7 @@ if __name__ == '__main__':
print(np.average(samp[0::2] * samp[1::2])) print(np.average(samp[0::2] * samp[1::2]))
pl.show() pl.show()
exit(0) exit(0)
plot = opt.phase or opt.plot or opt.vswr or opt.delay or opt.groupdelay or opt.smith or opt.unwrapphase or opt.polar plot = opt.phase or opt.plot or opt.vswr or opt.delay or opt.groupdelay or opt.smith or opt.unwrapphase or opt.polar or opt.tdr
if plot: if plot:
if opt.scan: if opt.scan:
s = nv.scan() s = nv.scan()
@ -389,5 +404,7 @@ if __name__ == '__main__':
nv.groupdelay(s) nv.groupdelay(s)
if opt.vswr: if opt.vswr:
nv.vswr(s) nv.vswr(s)
if opt.tdr:
nv.tdr(s)
if plot: if plot:
pl.show() pl.show()