Re: Internet RFI Issue

[w5tvw]

This effect JUST might be the cause of my problems too.  I am using Charter
cable too and Wi-Fi from the shack to the master bedroom across the house.
I also suspect too many "g" Wi-Fi protocol users on the very limited number
of channels may be wrecking things at non-descript times!  QRM if you will
on the 2.5 Ghz. Wi-Fi band!

If and when I can, I intend eventually getting an "n" protocol access point,
installing a CAT 5 cable from the ham shack in adjacent building thru the
attic to over the master bedroom and placing the access point in the attic
space.  If THAT is my primary problem, that should fix it!  I hope!

Give us a report when they get it sorted out Ron!

73,

Sandy W5TVW

-----Original Message-----
From: Ron D'Eau Claire
Sent: Thursday, January 19, 2012 10:20 PM
To: [hidden email]
Subject: [Elecraft] Internet RFI Issue

Since so many Hams today depend upon  their internet connection in the
"shack" I thought this might be of interest.



A few weeks ago I started losing my internet service in the evenings. I have
a Charter cable connection that had provided consistent >20 MBs downloads
and >4 MBs upload speeds until then. Suddenly I was faced with evening
download rates of 1 or 2 MBs and uploads of a couple of KBps - not enough to
keep e-mail POP servers from timing out on short text messages!  The next
day everything was back to normal.



I called Charter and they had a tech out to my place a couple of hours
later. He showed me the spectrum plots of my internet signal over a number
of days. Many evenings a huge surge of noise appeared that killed the S/N
ratio.



He explained that they've had to chase a number of these down in recent
months. He said that it is often caused by a TV set with a direct internet
connection for watching streaming programming. He explained that poor design
causes some TVs to inject huge noise levels into the cable connection,
apparently when the cable connection is not in use so the owner never
notices it. They've had to track down a number of them in this area.



He made some adjustments to increase my signal levels to help offset the
effect of the high noise levels, and said they'd have a team searching all
the node connections in the evenings to find the offender.



It's something to consider if your operating is interrupted by poor internet
service from a cable connection, especially during "prime time" hours. A
slower connection may not be simply a heavily loaded system.  Indeed, I've
yet to notice any "system loading" my service.



73, Ron AC7AC





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