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[Linrad] Re: MAP65-IQ Wideband Decodes
- Subject: [Linrad] Re: MAP65-IQ Wideband Decodes
- From: Joe Taylor <Princeton.EDU; joe@xxxxxxxxxxxxxxxx>
- Date: Mon, 06 Apr 2009 11:30:45 -0400
> What are the upper and lower frequency limits on the MAP65-IQ wideband
> Are they supposed to be the same as the wide waterfall, or do they go
Yes, the wideband decoding limits are supposed to be limited
to the same range as the upper waterfall.
> For some time I have had the feeling that good signals at the bottom
> end of the wide waterfall were failing to decode.
> Then yesterday I had the opposite! My Linrad centre frequency was set
> low at 28.110, giving me a wide waterfall from 28.080 to 28.140. There
> happened to be intense activity surrounding H44HP just out of sight on
> the wide waterfall, but it all decoded onto the blue screens. Is that
> supposed to happen?
No, but maybe "just outside" was close enough? I don't
recall exactly how the limits are set.
> Even on the Linrad wide waterfall, the signals on 28.144 were well
> down the slope at the right hand end!
Being "down on the slope" may not matter very much. The
program "flattens" the spectrum anyway, determining a local
baseline level at each potential decoding frequency.
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