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Author Topic: Larger than usual SNR swing - weather related?  (Read 859 times)

4candles

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Re: Larger than usual SNR swing - weather related?
« Reply #15 on: January 14, 2021, 04:49:48 PM »

Hmm . . . I am having a mental block. I think the channel characteristics function, H, is only determined when the xTU-C and xTU-R, at either end of the circuit, train-up. Hence an examination of plots of the logarithmic presentation of the channel characteristics function, Hlog, at different times all post the same one discrete circuit train-up will be identical.

Indeed, as you explained here.
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For every complex problem there is an answer that is clear, simple, and wrong.

tubaman

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Re: Larger than usual SNR swing - weather related?
« Reply #16 on: January 14, 2021, 05:06:56 PM »

Thanks for that 4candles - it explain why my two QLN graphs are the same as they are from the same sync event.
If it resyncs I'll try to remember to grab new ones.
 :)
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burakkucat

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Re: Larger than usual SNR swing - weather related?
« Reply #17 on: January 14, 2021, 10:12:32 PM »

Indeed, as you explained here.

Ah, thank you. As I typed that six and a half years ago, I have now had 78 months to forget the basic fundamentals . . .  :-[  :D
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tubaman

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Re: Larger than usual SNR swing - weather related?
« Reply #18 on: January 15, 2021, 08:07:32 AM »

Ah, thank you. As I typed that six and a half years ago, I have now had 78 months to forget the basic fundamentals . . .  :-[  :D

In my book 50% retention after 78 months is damn good. I can forget stuff as fast as I'm told it!  :lol:
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tubaman

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Re: Larger than usual SNR swing - weather related?
« Reply #19 on: January 27, 2021, 08:01:09 AM »

DLM has moved me back to 3dB again. I seem to be in an approx fortnightly ping-pong between 4dB and 3dB. At 4dB start the SNR dips don't cause any significant ES, whereas at 3dB I get loads of them.
Why can't DLM just make up its mind?  :comp:
« Last Edit: January 27, 2021, 08:15:31 AM by tubaman »
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