[time-nuts] ? phase comparison or other device

Dr Bruce Griffiths bruce.griffiths at xtra.co.nz
Mon Jun 25 04:37:29 EDT 2007

Ulrich Bangert wrote:
> Pete,
>>>>  5. Mini-circuits BLP-1.9 low pass filter.
> terminating the mixer if output with an lowpass/bandpass filter and NOT
> with an diplexer is not so good an idea. Where does the rf go?
> Best regards
> Ulrich Bangert

This depends on whether the low pass filter has a shunt capacitor at its 
input or a series inductor.
With the shunt capacitor the RF is shunted to ground through this capacitor.
With a series inductor the RF sees a relatively high input impedance and 
the mixer will not perform well.


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