[TenTec] Effect of roofing filter selection on Orion II NB

[Bill Tippett]

NQ5T:

 >Found that DSP NB performance was greatly improved by setting the roofing
filter selection to 20 Khz, and also improved although less so at 6 KHz.
With a 2.4 Khz roofing filter in line, the DSP NR had virtually no effect on
the specific form/content of 75M garbage this morning.

         Which illustrates my previous point that
there is nothing NR does that turning BW down
manually will not do (and much faster).  NR is
simply an automatic DSP BW control which builds
a narrow filter around the signal.  NR reduces
noise bandwidth by narrowing the filter and
is not performing some magical S/N enhancement.

                                         73,  Bill  W4ZV