[time-nuts] ? phase comparison or other device

[Dr Bruce Griffiths]

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
>
>   
Ulrich

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.

Bruce