Channelizer demonstration

I’ve put a short video of my tweaked version of Chris’ NOAA radio
channelizer demo on Youtube at: https://youtu.be/mTUSVNdCxa4

The screen capture didn’t get the drop-down box when I changed channels,
but if you look at the upper-left corner you’ll see the channel change
every few seconds.

I can hear stations on 5 to 6 of the NOAA channels from home, so it
makes a kind of neat comparison. It’s also interesting to look at all
the channels on top of each other as you can spot the deviations from
nominal carrier frequency (after all, I’m a time-nut!).

The current version of the .grc file (which I’m still tweaking on) is
also attached.

John

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