On 3/3/2013 8:01 PM, Roger (K8RI) wrote:
computers on cat6 megabit, as well as one net book, one lap top, and
one printer on wireless. NADA, but I do hear two signals that appear
to be routers spread across about 14 MHz clear up into the VHF range.
Hi Roger,
There are several common spurs that show up in CW bands, which is where
I mostly operate. They are good "beacons" for Ethernet trash. They are
around 14029.5, 21052.5, and the very low end of 10M (like 28014, etc.)
Each switch is free-running on it's own clock, so if you have neighbors
you'll hear these spurs for each of them on a slightly different
frequency. I heard at least 3-4 in Chicago, but out here in the woods,
with antennas pretty far from the house, I barely hear my own router
(which, of course, is choked).
Dale and Cortland -- something you could do for us is provide a good
description of the spectra that typically results from Ethernet traffic
so that we can identify it. Those slightly modulated carriers (plus a
lot more than those listed here), and broadband hash on 2M, is all that
I've identified myself.
73, Jim K9YC
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