How to find and eliminate the source of noise in the power line that makes the powerline inoperable?

  • Jan 10, 2021
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This is exactly what the title of the question from the reader Alexei sounded like.

This is the 13th part of a series of publications - "Electrics Q&A". Who missed the past parts - as always, I remind you that in this and past publications (parts) I bring real questions from readers and my answers to them. I continue to do so in this part.

I quote the text of the question verbatim:

In a country cottage, due to the lack of low current, the Internet is connected to two separate rooms through the powerline. Unfortunately, both lines are unstable - on one, when the ventilation is turned on, the speed drops from 30 megabits to almost zero, on the other, powerline devices sometimes stop seeing each other.

How do you identify the sources of the problem and eliminate the interference preventing the stable operation of the powerline?

Powerline

I gave Alexey the following answer due to my knowledge and qualifications:

To calculate the cause of the bad signal, you need to analyze the powerline adapter on another line or check the devices already connected. First, check the signal level in the router's network, perhaps your router's resources are not enough to redistribute the Internet between so many users. If the provided limit is sufficient for all rooms and receivers in them, check the operation of the lines through which the powerline adapters transmit data.

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The next question is the type of line to which the powerline adapter is connected, the manufacturer does not recommend using extension cords for this, preferring stationary wiring. But, to check existing lines, I recommend that you temporarily use an extension cord, if the signal improves, it is likely that the reason is in the wiring. If not, check the household equipment that is the most powerful source of electromagnetic interference.

These include:

  • Conditioners;
  • Washing machines;
  • Refrigerators;
  • Chargers for mobile phones;
  • Power supplies for electrical appliances.

If possible, the powerline adapter should be moved as far away from such devices as possible, so that they do not make their own adjustments to the quality of the transmitted signal. If this is not possible, connect the sources of interference to the network through a line filter, which will help to reduce the introduced distortion.

Another point to pay attention to is the permissible distance between powerline adapters. It de must exceed the established rate, otherwise no tricks will help you achieve the proper signal quality.

P.S. Dear readers of my channel, if you have your own version of the answer to such typical questions, write in the comments. I and other readers will be happy to read them.

P.S. Link to some past parts - Part 12, Part 11, Part 10, Part 9, Part 8.