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Author Topic: REIN REIN, go to Spain...  (Read 3889 times)

boozy

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Re: REIN REIN, go to Spain...
« Reply #90 on: July 07, 2018, 05:01:47 PM »

Still waiting for rain - a first for Scotland.

Is there a maximum possible number of FECs?  and did I reach it  :D...  I was getting CRCs too, but not as many as you'd think.

Still trying to figure out the hybrid response from broadcom's diagnostic tool.  If I look at the two different sets of peaks and troughs and calculate the lengths from that - it comes out at ~800m and ~100m...  that's roughly my line length and where I think the fault is.  Pure speculation though, as it could be measuring anything. Would love the manual for it ;D
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burakkucat

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Re: REIN REIN, go to Spain...
« Reply #91 on: July 07, 2018, 06:43:46 PM »

Is there a maximum possible number of FECs?  and did I reach it  :D... 

If the FEC count is stored as a 32-bit signed value the maximum is 231 = 2,147,483,648. If it is stored as a 32-bit unsigned value the maximum is 232 = 4,294,967,296.
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boozy

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Re: REIN REIN, go to Spain...
« Reply #92 on: July 07, 2018, 07:35:06 PM »

I should have asked that better :).  Is there a physical limit i.e.

60000000 (mb/s) / 1492 (packet size) * 60 (seconds) = ~2.4 million per minute

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burakkucat

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Re: REIN REIN, go to Spain...
« Reply #93 on: July 07, 2018, 08:15:37 PM »

Ah, I see. I'm not aware of any limit . . . but, thinking about it, there must be an upper-bound.  :-\
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boozy

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Re: REIN REIN, go to Spain...
« Reply #94 on: July 09, 2018, 10:04:05 PM »

In one of my regular tries with the water pistol I managed to get around the top of the pole wet :).  Not much, but it did drop the SNRM like it has previously for light rain.  Looks like I found the location, and it isn't the strange wrapping round the cable.  I think I'll wait for some rain before reporting this as my hit rate is well under 1% (the wheat in the field is much healthier around my target  :D), I don't think I could wet it on demand.


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