47 CFR 101.1333 – Interference protection criteria
(a) Frequency coordination. All EA licensees are required to coordinate their frequency usage with co-channel adjacent area licensees and all other affected parties.
(b) EA licensees are prohibited from exceeding a signal strength of 40 dBµV/m at their service area boundaries, unless a higher signal strength is agreed to by all affected co-channel, adjacent area licensees.
(c) EA licensees are prohibited from exceeding a signal strength of 40 dBµV/m at incumbent licensees’ 40.2 kilometer (25-mile) radius composite contour specified in § 101.1331(c).
(d) In general, licensees shall comply with the appropriate coordination agreements between the United States and Canada and the United States and Mexico concerning cross-border sharing and use of the applicable MAS frequencies.
(1) Canada—932.0-932.25 MHz and 941.0-941.25 MHz. (i) Within Lines A, B, C, and D, as defined in § 1.928(e) of this chapter, along the U.S./Canada border, U.S. stations operating in the 932.0-932.25 MHz and 941.0-941.25 MHz bands are on a secondary basis and may operate provided that they shall not transmit a power flux density (PFD) at the border greater than ?100 dBW/m
Table 1—Maximum Radiated Power
Class of station | Band MHz | Maximum EIRP | Maximum ERP 1 | ||
---|---|---|---|---|---|
Watts | dBW | Watts | dBW | ||
Master | 941.0-941.5 | 1000 | 30 | 600 | 27.8 |
Fixed Remote and Master | 932.0-932.5 | 50 | 17 | 30 | 14.8 |
1 Where ERP = EIRP/1.64.>
(ii) Maximum antenna height above average terrain for master stations operating at a maximum power shall not exceed 150 meters. Above 150 meters, the power of master stations shall be in accordance with following table:
Table 2—Antenna Height—Power Reduction Table
Antenna height above average terrain (meters) | EIRP | ERP | ||
---|---|---|---|---|
Watts | dBW | Watts | dBW | |
Above 305 | 200 | 23 | 120 | 20.8 |
Above 275 to 305 | 250 | 24 | 150 | 21.8 |
Above 245 to 275 | 315 | 25 | 190 | 22.8 |
Above 215 to 245 | 400 | 26 | 240 | 23.8 |
Above 180 to 215 | 500 | 27 | 300 | 24.8 |
Above 150 to 180 | 630 | 28 | 380 | 25.8 |
This information is from the Arrangement between the Federal Communications Commission and the National Telecommunications and Information Administration of the United States of America, and Industry Canada concerning the use of the bands 932 to 935 MHz and 941 to 944 MHz along the United States-Canada border signed in 1994. This agreement also lists grandfathered stations that must be protected.
(2) Canada—928-929 MHz and 952-960 MHz. Between Lines A and B and between Lines C and D, as defined in § 1.928(e) of this chapter, along the U.S./Canada border, U.S. stations operating in the 928.50-928.75 MHz and 952.50-952.75 MHz bands are on an unprotected basis and may operate provided that they shall not transmit a power flux density (PFD) at or beyond the border greater than ?100 dBW/m
Antenna height above average terrain (m) | EIRP | |
---|---|---|
Watts | dBm | |
Above 305 | 200 | 53 |
Above 275 to 305 | 250 | 54 |
Above 244 to 274 | 315 | 55 |
Above 214 to 243 | 400 | 56 |
Above 183 to 213 | 500 | 57 |
Above 153 to 182 | 630 | 58 |
Below 152 | 1000 | 60 |
This information is from the Arrangement between the Department of Communications of Canada and the Federal Communications Commission of the United States of America Concerning the Use of the Bands 928 to 929 MHz and 952 to 953 MHz along the United States-Canada Border signed in 1991. This agreement also lists grandfathered stations that must be protected.
(3) Mexico. Within 113 kilometers of the U.S./Mexico border, U.S. stations operating in the 932.0-932.25 MHz and 941.0-941.25 MHz bands are on a secondary basis (non-interference to Mexican primary licensees) and may operate provided that they shall not transmit a power flux density (PFD) at or beyond the border greater than ?100 dBW/m
Antenna height above average mean sea level (meters) | EIRP | |
---|---|---|
Watts | dBW | |
Above 305 | 200 | 23 |
Above 274 to 305 | 250 | 24 |
Above 243 to 274 | 315 | 25 |
Above 213 to 243 | 400 | 26 |
Above 182 to 213 | 500 | 27 |
Above 152 to 182 | 630 | 28 |
Up to 152 | 1000 | 30 |
This information is from the Agreement between the Government of the United States of America and the Government of the United Mexican States Concerning the Allocation and Use of Frequency Bands by Terrestrial Non-Broadcasting Radiocommunication Services Along the Common Border, Protocol #6 Concerning the Allotment and Use of Channels in the 932-932.5 and 941-941.5 MHz Bands for Fixed Point-to-Multipoint Services Along the Common Border signed in 1994.