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Old March 23rd 09, 09:24 PM posted to rec.radio.amateur.antenna
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Default Noise figure paradox

"Joel Koltner" wrote in
:

"Richard Clark" wrote in message
...
Perhaps I should more blunt, but the quote I lifted only speaks to
two things: an antenna, and a claim for its signal to noise ratio.

60 dB ??????????????


Originally I almost added something like, "(assume you're standing
next to the transmitter)" :-)

60dB+ isn't unheard of for hilltop-to-hilltop microwave links though,
is it? And one might obtain 50dB with regular TV antennas if they have
a good line-of-sight to the transmitter and there aren't significant
reflections, right?


It doesn't solve the problem.

You still haven't given enough information to determine the absolute
level of either signal or noise, and you need that to consider the impact
of the DUT's internal noise (which you know in absolute terms).

Owen

 
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