PLC home plug adapters do make radio interference !
To Nebulo, Gary:
You say that good powerline products don't emit on frequencies used for communications.
In this area I must disagree with you. I have tested some Devolo Home Plug unit's and found them to emit on frequencies used for AM shortvawe bands etc.. There was notches in most of the amateur radio bands, but there still are some interference here also. Some PLC units have been tested by the Norwegian telecommunication authoroties, but none of the units pass the EN55022 test. EMC reqirements are all going "down the drain" because of "loose" requirements and new EU laws. This is bad news for HF radio spectrum users.
In the video link below you see my test of the Devolo units. I did start transferring of a big file from one computer to the other in my own apartment, then I walk outside to see the range of the PLC interference to the shortvawe band. I start to walk toward my house, and as you can see the interference are severe.
As you can see the radio interference makes it impossible to listen to AM shortwave.
For those who wants to use the AM shortwave bands, this will be impossible with these units in the neighbour house or in a 80-100m radius from the radio antenna.
That is why we shall all use CAT-5 cable for our home networks !
Many radio amateurs are buying amateur radio equipment for maybe £10.000 or more , and then some plastic box costing £40 are wiping out parts of the radio spectrum. This does not make sense !
Register
PLC home plug adapters do make radio interference !
To Nebulo, Gary:
You say that good powerline products don't emit on frequencies used for communications.
In this area I must disagree with you. I have tested some Devolo Home Plug unit's and found them to emit on frequencies used for AM shortvawe bands etc.. There was notches in most of the amateur radio bands, but there still are some interference here also. Some PLC units have been tested by the Norwegian telecommunication authoroties, but none of the units pass the EN55022 test. EMC reqirements are all going "down the drain" because of "loose" requirements and new EU laws. This is bad news for HF radio spectrum users.
In the video link below you see my test of the Devolo units. I did start transferring of a big file from one computer to the other in my own apartment, then I walk outside to see the range of the PLC interference to the shortvawe band. I start to walk toward my house, and as you can see the interference are severe.
Link: http://www.youtube.com/watch?v=zlJvUwSZqNE&feature=channel_page
In this test you see the Devolo units in standby mode:
http://www.youtube.com/watch?v=cHtCkOVQfjA&feature=channel
And the same test with the Devolo units in transfer mode:
http://www.youtube.com/watch?v=KMR4wPDUM9g&feature=channel
As you can see the radio interference makes it impossible to listen to AM shortwave.
For those who wants to use the AM shortwave bands, this will be impossible with these units in the neighbour house or in a 80-100m radius from the radio antenna.
That is why we shall all use CAT-5 cable for our home networks !
Many radio amateurs are buying amateur radio equipment for maybe £10.000 or more , and then some plastic box costing £40 are wiping out parts of the radio spectrum. This does not make sense !
LA4AMA
Roar Dehli
Norway