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More on AM Field Strength Measurements

B

Brian Bowers

Now that it has been confirmed that the Potomac Instruments FIM-21/41 meter switch should be in the LIN position for field strength measurements...

I believe, many years ago, the FCC issued us physical locations to conduct our AM Field Strength Measurements. Do those locations remain with the station for life? Would they, or could they, ever change?

As stated with those locations, are field strength measurement limits. Can our measurements ever legally exceed those limits? We are taking the measurements quarterly. Is that correct?

As always, thanks for your help.
 
Your station records should accurately identify the location of your monitor points.
These monitor points remain until they are changed to new, FCC-approved locations. Generally, the reason for changing the location of a station's monitor point is new construction which makes it difficult or impossible to use the monitor point (for any number of reasons).
I advise you to take monitor point readings weekly. If something causes your monitor point(s) to go out of tolerance, you need to know immediately so that you can identify the reason for the problem.
If the measured signal strength at your monitor point(s) exceeds the licensed limits, you must find the cause and correct it immediately. If the reason can't be determined, you must contact the FCC and they will give you temporary authority to operate (at a reduced power) with your licensed parameters out of tolerance.
You should read the FCC Rules and Regulations which pertain to AM directional operation.
 
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