RFI – More Vigilance Coming?

A posting yesterday in the Yahoo MW DXer's Group pointed to a new article at RadioWorld.com, re the new urgency within the broadcast field to address the growing noise floor.

The article "Noise Inquiry Spurs Recommendations" discusses the fallout from last year's FCC Technical Advisory Council's (TAC) Inquiry ET-16-191, seeking public comments on the rapid increase in "man-made RF noise issues".

As radio amateurs have known for decades already, there is a huge problem when it comes to spectrum noise levels. They were even complaining about this way back in 1932's Short Wave Craft ... "The reasons for this extraordinary amount of noise which we have to contend with at the present time are manifold." If only they knew how quiet it really was!

Now that noise is beginning to have severe affects on profit margins when it comes to AM, FM, TV and Wi-Fi connected devices, it seems that there may now be a larger appetite for some resolution.

"Other industries using RF wireless technologies report growing noise trouble as well. A recent IEEE Spectrum article was subtitled “Electronic Noise Is Drowning Out the Internet of Things.” Designers of IoT devices are not getting the range they expect due to unexpectedly high background noise, it reported."

Comments to the enquiry pointed out the usual offenders, all well-known to hams, such as noisy powerlines, switching power supplies, noisy motors etc and emphasized the fact that none of these offenders should cause interference if properly designed.

The TAC Working Group recommended some steps that it thought the FCC should take with the key one being an FCC Notice of Proposed Rulemaking to "resolve unanswered questions and take corrective action".

According to a recent meeting between The Association of Federal Communications Consulting Engineers and FCC officials, it was pointed out that:
  • there had been no official RF noise studies done in over 40 years. 
  • some manufacturers are deliberately cheating to skirt emission requirements.
  • those in charge of enforcement (FCC) need to be more diligent. 
Much can be said for the same conditions here in Canada where our ISED has failed to properly safeguard spectrum noise pollution.
Other somewhat "telling" recommendations were also put forward and can be viewed in the Radioworld article here.

If you're one of the hundreds (thousands?) struggling with a new mystery noise source, perhaps you can identify the noise signature from one of these two sites:



It is reported that the new FCC Chairman seemed receptive to the concerns presented but so far there has been no official action. Hopefully he will soon tackle this with the same gusto shown for chasing down illegal broadcasters. With recent FCC cutbacks and proposed budget slashing from Washington, one wonders if this problem will be given the attention that it needs before it is truly too late to reverse.
Steve McDonald, VE7SL, is a regular contributor to AmateurRadio.com and writes from British Columbia, Canada. Contact him at [email protected].

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