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[Code of Federal Regulations]
[Title 47, Volume 5]
[Revised as of October 1, 2005]
From the U.S. Government Printing Office via GPO Access
[CITE: 47CFR90.219]
TITLE 47--TELECOMMUNICATION
Subpart I_General Technical Standards
Sec. 90.219 Use of
signal boosters.
Use of signal boosters. Licensees authorized to operate radio systems in the
frequency bands above 150 MHz may employ signal boosters at fixed locations
in accordance with the following criteria:
(a) The amplified signal is retransmitted only on the
exact frequency(ies) of the originating base, fixed, mobile, or portable
station(s). The booster will fill in only weak signal areas and cannot
extend the system's normal signal coverage area.
(b) Class A narrowband signal boosters must be equipped with automatic
gain control circuitry which will limit the total effective radiated power
(ERP) of the unit to a maximum of 5 watts under all conditions. Class B
broadband signal boosters are limited to 5 watts ERP for each authorized
frequency that the booster is designed to amplify.
(c) Class A narrowband boosters must meet the out-of-band emission limits
of § 90.209 for each narrowband channel that the booster is designed to
amplify. Class B broadband signal boosters must meet the emission limits
of § 90.209 for frequencies outside of the booster's design passband.
(d) Class B broadband signal boosters are permitted to be used only in
confined or indoor areas such as buildings, tunnels, underground areas,
etc., or in remote areas, i.e., areas where there is little or no risk of
interference to other users.
(e) The licensee is given authority to operate signal boosters without
separate authorization from the Commission. Certificated equipment must be
employed and the licensee must ensure that all applicable rule
requirements are met.
(f) Licensees employing either Class A narrowband or Class B broadband
signal boosters as defined in § 90.7 are responsible for correcting any
harmful interference that the equipment may cause to other systems. Normal
cochannel transmissions will not be considered as harmful interference.
Licensees will be required to resolve interference problems pursuant to §
90.173(b).
[61 FR 31052, June 19, 1996, as amended at 63 FR 36610,
July 7, 1998]
From 90.7 (Definitions)
of Class A and Class B signal boosters:
A signal booster may be either narrowband (Class A), in
which case the booster amplifies only those discrete frequencies intended
to be retransmitted, or broadband (Class B), in which case all signals
within the passband of the signal booster filter are amplified.
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