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Old March 23rd 09, 11:03 PM posted to rec.radio.amateur.antenna
Jim-NN7K[_2_] Jim-NN7K[_2_] is offline
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First recorded activity by RadioBanter: Sep 2007
Posts: 52
Default Noise figure paradox

Perhaps , might be related to the old dB Rnco Standard, in analog
microwave paths (for setting Muting (squelch)) with a 30 dB S/N ratio,
at a specified freq slot or channel in the bandwidth (think 1.8 MHz )?

Think gave close to 52 dB s/n ratio at the lowest frequency in the
baseband (order wire) . Jim NN7K




Joel Koltner wrote:
"Owen Duffy" wrote in message
...
"Joel Koltner" wrote in
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.


I thought Richard's main problem was that 60dB is (relatively) unheard of in
wireless systems. I agree with you 100% that not enough information was given
to determine the absolute signal or noise levels.