[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:
>>>> 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.
More information about the time-nuts