|
Although I have not used the device, I am pleased that Dick is another who
believes in selective filtering in rx front ends. This "modern" trend towards
broadband/octave filters in the per-mixer stages of receivers I have always,
instinctively, shied away from. It has always seemed logical to me that the
ideal situation for any mixer device is that it is presented with the minimum
number of signals with which to deal viz the local oscillator (low noise,
stable, undistorted) and the wanted signal (ideally stripped of all unwanted
"other noise" by selective filtering). Perhaps the ultimate aim is a rx in which
true " single signal" processing is achieved from antenna to demodulated output
in a single step (and yes! I have heard of DC receivers but yeucccch!)
73
g4gvw
|
|
