Goto Section: 90.727 | 90.733 | Table of Contents
FCC 90.729
Revised as of October 1, 2008
Goto Year:2007 |
2009
Sec. 90.729 Limitations on power and antenna height.
(a) The permissible effective radiated power (ERP) with respect to antenna
heights for land mobile, paging, or fixed stations transmitting on
frequencies in the 220–221 MHz band shall be determined from the following
Table. These are maximum values and applicants are required to justify power
levels requested.
ERP vs. Antenna Height Table^2
Antenna height above average terrain (HAAT), meters Effective radiated
power, watts^1
Up to 150 500
150 to 225 250
225 to 300 125
300 to 450 60
450 to 600 30
600 to 750 20
750 to 900 15
900 to 1050 10
Above 1050 5
^1Transmitter PEP shall be used to determine ERP.
^2These power levels apply to stations used for land mobile, paging, and
fixed operations.
(b) The maximum permissible ERP for mobile units is 50 watts. Portable units
are considered as mobile units. Licensees operating fixed stations or paging
base stations transmitting on frequencies in the 221–222 MHz band may not
operate such fixed stations or paging base stations at power levels greater
than 50 watts ERP, and may not transmit from antennas that are higher than 7
meters above average terrain, except that transmissions from antennas that
are higher than 7 meters above average terrain will be permitted if the
effective radiated power of such transmissions is reduced below 50 watts ERP
by 20 log[10](h/7) dB, where h is the height above average terrain (HAAT),
in meters.
(c) Base station and fixed station transmissions on base station transmit
Channels 196–200 are limited to 2 watts ERP and a maximum antenna HAAT of
6.1 meters (20 ft). Licensees authorized on these channels may operate at
power levels above 2 watts ERP or with a maximum antenna HAAT greater than
6.1 meters (20 ft) if:
(1) They obtain the concurrence of all Phase I and Phase II licensees with
base stations or fixed stations receiving on base station receive Channels
1–40 and located within 6 km of their base station or fixed station; and
(2) Their base station or fixed station is not located in the United
States/Mexico or United States/Canada border areas.
[ 62 FR 15996 , Apr. 3, 1997, as amended at 63 FR 32590 , June 12, 1998]
Goto Section: 90.727 | 90.733
Goto Year: 2007 |
2009
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