47 C.F.R. § 101.143 Minimum path length requirements.
Title 47 - Telecommunication
(a) The distance between end points of a fixed link in the private operational fixed point-to-point and the common carrier fixed point-to-point microwave services must equal or exceed the value set forth in the table below or the EIRP must be reduced in accordance with the equation set forth below: (b) For paths shorter than those specified in the table in paragraph (a) of this section, the EIRP shall not exceed the value derived from the following equation: EIRP = MAXEIRP–40*log(A/B) dBW
Where: EIRP = The new maximum EIRP (equivalent isotropically radiated power) in dBW. MAXEIRP = Maximum EIRP as set forth in the Table in Section 101.113(a). A = Minimum path length from the Table above for the frequency band in kilometers. B = The actual path length in kilometers. Note to paragraph (c) Upon an appropriate technical showing, applicants and licensees unable to meet the minimum path length requirement may be granted an exception to these requirements. Note to paragraph [61 FR 26677, May 28, 1996, as amended at 65 FR 38330, June 20, 2000]
Title 47: Telecommunication
PART 101—FIXED MICROWAVE SERVICES
Subpart C—Technical Standards
§ 101.143 Minimum path length requirements.
------------------------------------------------------------------------ Minimum Frequency band (MHz) path length (km)------------------------------------------------------------------------Below 1,850................................................ N/A1,850 to 7,125............................................. 1710,550 to 13,250........................................... 5Above 17,700............................................... N/A------------------------------------------------------------------------
