Hello,

If i have a wireless device completely operating a certain frequency and this frequency fall below 1GHz. Incase, If i want to do Radiated Emission scan i am pretty much sure at this certain frequency the Electrical field would be above the permitted threshold limit. Is there any possible to ignore this frequency and write a reasoning behind it

What strategy would be most effective in this situation?

 

Back in the day when I was conducting limited EMC testing, only benign products such as a kettle were considered to be exempt from EMC test. With deliberate rf transmission, your device will fall under the RED Directive (Radio Equipment Directive Directive), which came into force after my testing days. The permitted threshold limits of devices deliberately transmitting rf are more relaxed (for obvious reasons).

Besides your fundamental frequency, there will be harmonics and other emission sources within the device that will affect the EMC performance – therefore I would say that the only way to determine compliance would be through test.

But if you contact an EMC test facility, they will normally be happy to advise of what testing is necessary for your target market, most will offer pre-compliance testing, looking at areas of particular concern.

 

The emissions from your device would be RFI (Radio Frequency Interference). Signal radiation in the USA is regulated by the FCC, a government segment that enforces a whole lot of quite detailed regulations as to how much power can be radiated at any given frequency. If you are willing to let us know what frequency your device radiates, probably somebody watching this thread will be able to advise you as to what rules may apply.
And if the signal interferes with certain services, at some frequencies, you may be visited by armed Federal Marshals to help you stop radiating that signal immediately. Not a happy experience.