Oooops. Correction. That 3.07MHz sampling frequency will NOT work for
the example filter I gave, because the harmonic at 46.07 will alias the
range from 45.57 to 44.57 into the 0.5-1.5MHz output band. And 44.57
to 45.5 does not have acceptable attenuation. Better use instead a
4.3MHz sampling, so that the 10th harmonic converts the desired band to
0.5-1.5MHz, and the 11th harmonic at 47.3 converts the highest
unprotected frequency, 46.5MHz, to 1.8MHz, which is above the output
band of interest.

Cheers,
Tom