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tobin/pdh.gnuplot

Created February 28, 2013 16:52
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Plot PDH error signal in Gnuplot
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pdh.gnuplot
f_mod = 35.5e6
pcav = 300e3
i = {0, 1}
conj(z) = real(z) - i*imag(z)
r_c(f) = i*f / (i*f + pcav)
pdh(f) = imag(r_c(f)*conj(r_c(f+f_mod))-conj(r_c(f))*r_c(f-f_mod))
set samples 501
set xrange [-f_mod*2 : f_mod*2]
set yrange [-1.2 : 1.2]
plot pdh(x)
set xrange [-pcav*4 : pcav*4]
plot pdh(x)
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