Rick:
Since your SDR has notch inside the AGC loop, it must not be all that difficult
to accomplish. Of course, I do not have sufficient knowledge of SDR designs to
know how they manage AGC or notch functions.
Too bad no one is writing software for the Orion anymore. It would be nice if
that change could be done. I might even buy one then...
I should have added the caveat in my remark regarding the relative uselessness
of a notch filter outside the AGC line by saying “useless to ME”. Others are
certainly free to believe that an external notch filter (that is, external to
the AGC loop) is equally effective (manual or otherwise).
This topic was beaten to death maybe 30 to 40 years or so ago when relatively
decent external filters, such as the Autek and later on when DSP devices were
introduced. They were pitched as offering Collins or Drake-like performance in
otherwise mediocre receivers. They didn’t, but they did make operation less
annoying to some degree. They also worked pretty well if you turned off the AGC
and used the RF gain pot to compensate for variations in signal strength.
Gary
PS: Icom is the leader here in direct SDR, FOR ME. The performance is not there
yet but I have zero interest in needing to have my PC on to run my radio. The
7300 does not need a PC to work, the others do. They are headed in the right
direction. If Ten Sec ever introduces a new radio, likely it will head in that
direction too.
> On Jul 20, 2017, at 7:08 AM, rick@dj0ip.de <Rick@DJ0IP.de> wrote:
>
> notch
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