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Articles

FCC Denies Motorola Waiver for Non-Standard Pairing of Low Power Frequencies in 450-470 MHz Band

November 9, 2010

Articles

FCC Denies Motorola Waiver for Non-Standard Pairing of Low Power Frequencies in 450-470 MHz Band

November 9, 2010

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The Federal Communications Commission (FCC) has denied a request by Motorola for a blanket waiver of the required 5 MHz separation between paired 450-470 MHz band base and mobile frequencies.

Section 90.173 of the FCC’s rules provides that frequencies in the 450 MHz band are ordinarily assigned in pairs, with the mobile transmit frequency 5 MHz above the paired base station transmit frequency.  Section 90.267 provides that certain frequencies in the 450 MHz band are designated for low power use subject to varying coordination and operating conditions or restrictions.  Motorola had requested a blanket waiver of the separation standard with respect to all applications for low power operations in the 450 MHz band that are submitted pursuant to Section 90.267.  Motorola’s waiver request was opposed by the Association of Public Safety Communications Officials International, Inc. (APCO) and Enterprise Wireless Alliance (EWA).

The FCC concluded that grant of a blanket waiver is not in the public interest because it would increase the complexity of frequency coordination in the 450 MHz band, would raise the potential for increased interference, and would harm spectrum efficiency.  The FCC found that Motorola did not demonstrate that the occurrence of intermodulation interference when multiple repeater cells are used within close proximity is such a common problem that a blanket waiver is warranted.  The FCC stated that requests for waiver of the required 5 MHz separation will continue to be addressed on a case-by-case basis, and granted only where the applicant demonstrates that standard frequency pairs are not usable.

A copy of the FCC’s Order is available at: http://www.fcc.gov/Daily_Releases/Daily_Business/2010/db1109/DA-10-2163A1.pdf

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