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I know that there is another thread that asks a similar question however the questioner there had DSL internet, so I think my question is sufficiently different to warrant a new thread.

(Can my neighbor's ham radio antenna be interfering with my internet signal or is my internet provider just throwing blame elsewhere?)

I have wireless internet service using LTE signal. I have had constant problems for several years. The tech from the ISP was here AGAIN last week and is throwing up his hands not knowing what to do. His report to his boss is that ‘the signal sucks and there’s nothing he can do about it’. He says that other customers several miles away have ‘great signal’ and that our stretch of road and the adjoining road was a ‘black hole’.

I am not a techie…just trying to figure out this mess so my kids can do their online school!

A neighbour who lives about 500m away at the corner of the adjoining road is a ham radio operator. He has been there for years. It just dawned on me tonight that maybe his equipment was causing interference with my LTE signal. So searched and came across this site. Nice to meet you all :)

I believe that this is the info on my LTE system.

Frequency 3615.0 MHz

Bandwidth 20 MHz

The SINR number for my signal is inexplicably VERY low (0-2 and even sometimes -1) indicating high level of signal interference. I'm led to understand that this should be up higher than 12 or 13, preferably 20.

QUESTIONS

  1. So is it possible that interference from the ham radio is the source?
  2. Is it possible that the signal from the ham radio is aimed in a certain 'direction', or is it 360deg?

I understand from the discussion on 6887 that it's not the ham radio operator’s ’fault’ and that the wireless internet equipment should filter interference out, and it may not be doing what it is supposed to be doing.

If you need more info to help answer, please let me know and I will edit the question to make it more complete.

Any assistance is appreciated!

Phil

Philip Lee
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1 Answers1

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the short answer to #1 is that it is possible but not at all likely for the same reasons Kevin outlines in his answer to the question you linked to, especially the fact that almost no ham radio operators transmit continuously... only when actually having a conversation, and only when it's our turn to speak in the conversation.

Answering #2, the directivity of the ham's signal: it depends on the antenna. If the antenna he has is just a wire or pole sticking straight up in the air, it's pretty close to 360° even. If it's any other configuration, it's stronger in some directions and weaker in others.

A note regarding interpreting your measured signal to noise ratio (SINR), it may indicate a higher noise floor where you are OR a lower signal from your carrier. Without measuring the noise floor and signal strength separately at a location that "works," it's difficult to understand what's "really" happening.

It may be (likely is) that the antenna configuration & power from your service provider in your direction is just not strong enough for the service level expected. Or perhaps your antenna is either misconfigured or not the most appropriate for service operation... this seems especially likely given your comment below re immediate neighbors' service level seems good with their antennas.

Finally: go introduce yourself to the ham! Many of us LOVE figuring out stuff like this. It may be that he even has the equipment to measure your signal issues and help diagnose and get to a solution.

BEWARE: you may become interested enough to get a license and pick up a fascinating new hobby... if that happens, we'll be here to welcome you in :-)

webmarc
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