[TenTec] Questions about NR i.e. Orion

[Bill Tippett]

I wrote:

 > NR effectiveness?  Measure MDS (Minimum Discernable
 > Signal) with DSP BW = 100 Hz and NR Off.  Then
 > switch NR On and measure it again.

Sinisa replied:

 >MDS, S/N and similar measurements with NR on
must be performed completely with the signal present,
and not by switching the signal on and off.

         I agree.  I meant with the signal
always present and DSP BW always = 100 Hz,
but with the two cases of NR On and NR Off.
Of course this could result in an impractical
reading if NR reduces the BW beyond what a
CW signal's normal BW is.  The narrowest BW
will always win a MDS test but it may not be
practical for copying real-world CW signals
that have bandwidths wider than a carrier.
It would be interesting to know if the NR
algorithm limits the lower bandwidth to a
"real world" practical value (such as 50 Hz).

                                 73,  Bill  W4ZV