I am working on a RFI case that we believe is coming from a nearby home.
The owner is a little cooperative, but is not interested in doing a ckt
breaker test. The noise exhibits some interesting characteristics that may
help us in suggesting he unplug a device. Perhaps someone has seen this
before.
1. On the pan adapter, looks like power line noise. Random dots across
the screen.
2. No repeating clusters of noise vs frequency that might suggest a
SMPS.
3. No correlation to sunlight or darkness. No correlation to time of
day.
4. Has distinct levels of interference; we have noted -85dBm, -78dBm,
-72dBm (S-9), -66dBm. Interesting the levels are about 6dB apart. -78 and
-72 are most common.
5. The neighbor has a solar system installed roughly 2 years ago, but
as mentioned, no correlation to sunlight/darkness or time of day.
6. Affects mostly 80M but can be heard on other bands
Has anyone seen 4 levels of noise from a device before?
Thanks for any ideas.
Jeff, W4DD
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