I am not yet sure. That depends on the distance to your neighbour, the infrastructure in his house (wire resonances and line attenuation, distance between his two PLC-wallplugs a.s.o).CaptainNemo wrote:If I understand well, jpsa posted an image of an idle modem,
For me it is a modem in normal operation being a bit further away. Idle modems do indeed a sort of "ping" periodically. These pings of my neighbours (if I can discriminate them, when they are all on I have no chance in that mess to discriminate single modems) take place irregularly appr. every 1 or 2 seconds. This sounds like a short lightning stroke. This alone is very nasty.
I have found an older image from my WiNRADiO G33DDC of my neighbour's PLC (40 m away) and an image from a friend wo had even more trouble (Perseus screenshot). In his case the modems were only 7 m away from his antenna. Looking at my image you can see that only the strongest radio stations in the 49 m band come through. I have marked the notches green. Considering that the noisefloor here in the ham bands is about -125 to -130 dBm and the PLC noise is up to -100 dBm you can imagine that this is a big problem. (On higher frequencies there is even more noise!)
In the meantime I have given up making screenshots and recordings: It is all useless! I hate to deal with the subject and switch off the receivers when I am nerved, you understand.
There is an article of a German magazine, unfortunately in German, but in some images taken from an Elad receiver you can see what PLC means in real life (pages 2 and 3). Maybe google translate can bring a bit clearing when you are interested in the details. https://www.teltarif.de/powerline-devol ... 59169.html
Especially this image: https://www.teltarif.de/arch/2015/kw13/ ... est-6l.jpg You see the ham band notch and left and right the PLC mess.