FCC Seeks Comment on TETRA Association’s Request for Waiver (12/29/09)
Tuesday, December 29, 2009 | Comments

The TETRA Association filed a request for waiver of Parts 2 and 90 of the FCC’s rules to allow TETRA technology to be used in the United States. The commission’s Office of Engineering and Technology (OET) is reviewing the waiver request.

OET has concluded that in order to develop a complete record on the complex issues presented by this request, this proceeding will be treated, for ex parte purposes, as a “permit-but-disclose” proceeding. Interested parties may file comments by Jan. 15, and reply comments by Jan. 29.

The association states that the TETRA standard meets all Part 90 requirements except for those pertaining to occupied bandwidth and emission masks. It seeks a waiver of Section 90.209(b)(5), which authorizes operations at an occupied bandwidth of up to 20 kilohertz, noting that the occupied bandwidth of TETRA equipment is 21.5 ± 0.5 kilohertz.

The association also seeks a waiver of Section 90.210(b)(c) and (g) of the commission’s rules governing emission masks B, C, and G to allow for up to 5 dB excursions around 10-kilohertz offset from the center frequency. The association states that the ETSI standard relies on a measure of adjacent channel coupled power, rather than an occupied bandwidth limit and an emission mask, and that TETRA devices outperform the FCC emission masks.

The association notes that certain TETRA manufacturers are seeking FCC certification of TETRA radios using reduced power that will permit compliance with existing Part 90 rules, because of the immediate demand for TETRA-style radios while the waiver request is being processed. It seeks a waiver of Section 2.1043 of the commission’s permissive change rules to allow TETRA manufacturers who have received interim equipment authorizations using reduced power to upgrade to the TETRA standard without requiring a new FCC ID.

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