Andy, G4JNT gives some good insight into what the FFT techniqe is really
doing. I am not sure, but maybe who is able to program might try to get
hold of the Gram-sourcecode and modify it to our needs.
I have another point on my wishlist for the Gram-Software (or a similar
one):
Take advangate of both channels, feed the signal from the big antenna into
one channel, feed the signal from a second receiver with, for example an
indoor antenna connected to it, to the second channel, add them with
inverted phase and get rid of all that man-made noise that is generated in
the vicinity of the receiving antenna. I know, that this idea is not new,
it had been realizized on the RF side but I don't know of a software that
performs this job in the audio-frequency range (besides programs such as
"Cool Edit" that allow noise reduction post processing jobs doing the same,
howver, not online).
A challange for those excellent programmers out there?
Best 73
Geri, DK8KW (W1KW)
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