Re: EsHailsat Location Beacon running
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I enjoy reading technical comments on this group. But I think you have missed the effect of background LNB noise?
Just "seeing" the transponder noise floor is not enough to ensure S/N will be constant. In (the simple) case of a 3 dB transponder noise floor, what you see is actually the LNB noise floor plus an identical amount of transponder noise - adding up to a 3 dB increase. Increasing transponder noise floor from here will reduce influence of LNB noise - to a a point where LNB noise is really in the "background".
But at a low values of transponder noise floor there is some degadation in S/N. And LNB noise figure becomes important.
- or is it me missing something - hi.
73 Ole OZ2OE
Den 16. marts 2019 kl. 19.29.20 +01.00, skrev Andy G4JNT <andy.g4jnt@...>: