On 10/28/2018 12:54 PM, Hare, Ed W1RFI wrote:
"What is it?" is the wrong question.
Yes and no. K1TTT's observation that it's narrow, stable, and
unmodulated is quite useful -- it suggests that the emitter is likely
running on a stable clock and associated with some sort of
microprocessor, as opposed to a switch-mode power supply or variable
speed motor controller, which are generally free-running, unstable humps
of noise. Both types, of course, repeat periodically because they're
square waves.
The real question is: "Where is it?" Finding the house or location
where the noise is originating is what you will get to eventually, so
start with that question.
Yes, always a right question, and both Ed and Cortland have great answers.
73, Jim K9YC
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