§90.221. Adjacent channel power limits.
47 C.F.R. § 90.221
For the frequency bands indicated below, operations using equipment designed to operate with a 25 kHz channel bandwidth may be authorized up to a 22 kHz bandwidth if the equipment meets the adjacent channel power (ACP) limits below. The table specifies a value for the ACP as a function of the displacement from the channel center frequency and a measurement bandwidth of 18 kHz.
Maximum adjacent power levels for frequencies in the 450-470 MHz band—
In any case, no requirement in excess of −36 dBm shall apply.
Maximum adjacent power levels for frequencies in the 809-824/854-869 MHz band—
In any case, no requirement in excess of −36 dBm shall apply.
On any frequency removed from the assigned frequency by more than 75 kHz, the attenuation of any emission must be at least 43 + 10 log (Pwatts) dB.
Notes, amendments, and revision history
Amendments
[77 FR 61538, Oct. 10, 2012]
Authority
Authority: 47 U.S.C. 154(i), 161, 303(g), 303(r), 332(c)(7), 1401-1473
Source
Source: 43 FR 54791, Nov. 22, 1978, unless otherwise noted.
Amendments
[77 FR 61538, Oct. 10, 2012]