On Mon, 18 Apr 2005 13:22:17 GMT, Ron Hardin
wrote:

How does an ANC-4 work, _as to the phase shift_? Is the one input just split
and one leg run thru a capacitor and resistor to ground, and you select
some linear combination of the two inputs?


The ANC-4 noise canceller works by cancelling the noise before it
affects the receiver AGC circuits. It connects between you antenna and
receiver. A second antenna acts as a noise pickup. The front panel
controls allow adjustment of signal phase and magnitude from the two
antennas to effect noise cancellation. The ANC-4 can also operate as
an active antenna using a noise antenna and noise gain control to
amplify antenna output. And, it can be used as a diversity combiner to
pick up weak signals or null interfering signals. Complete
specifications on the ANC-4 are available from Timewave's web site.

Danny, K6MHE