105 CMR 122.291
Appendix B: Non-Amateur Intermittent Single Source Emitter Guide
The following separation guide must be followed or separation distances submitted to and
approved by the Director. The guide applies to the minimum distance that an antenna can be located
from external surface of any habitable structure not located on the property containing the source and
from habitable space on the same property normally occupied on a regular basis by others than the
immediate family an/or employees of the owner and/or operator of the source.
Frequency (MHz)
Minimum Distance From
Nearest
Current Maximum (feet)
less than 3
9.84 (KP/180,000)
3 - 30
3.78 f(KP/180,00)
30 - 300
3.28 (KP/200)
300 - 1500
3.28 (3KP/2f)
greater than 1500
3.28 (KP/1000)
where;
f is the frequency in megahertz
P is the ERP in watts
K equals 7.96
In addition, the minimum separation from any radiating part of the antenna shall be of the above
minimum separation from the nearest current maximum.
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