[time-nuts] From GPS World - Lightsquared has been given the goahead

[Charles P. Steinmetz]

Chris wrote:

>A notch filter can also be constructed to notch out the jammer if it
>is out of band.  A "twin T" design might be  effective and low cost

Unfortunately, unless the interfering carrier is much too far away to 
be a problem in the first place, the phase shift of the notch filter 
(and particularly its changes with temperature) will appear 
essentially as a variable-length coax on your antenna -- not what you 
want for precision timing applications.

Best regards,

Charles