FCC Part 15 DFS Testing Requirements Change for U-NII Devices

To accommodate changes in the Federal Communication Commission’s (FCC) Docket 13-49, the Dynamic Frequency Selection (DFS) test procedure document KDB 905462 D02 UNII DFS Compliance Procedures New Rules has been issued. 

The document describes the compliance measurement procedures for performing DFS tests under FCC Part 15 Subpart E Rules required for U-NII (Unlicensed –National Information Infrastructure) equipment that operates in the frequency bands 5250-5350 MHz and/or 5470-5725 MHz.

A U-NII network will employ a DFS function to detect signals from radar systems and to avoid co-channel operation with these systems. 

Section 6 provides the parameters for required test waveforms, minimum percentage of successful detections, and the minimum number of trials that must be used for determining DFS conformance.

One of the new requirements is for devices to detect a new radar waveform for DFS testing.  Historically, the FCC has required devices to detect 5 radar types. The new rules require detection of a 6th radar type which they designated as Type 1. A previous waveform which was designated as Type 1 is now called Type 0.  See the accompanying Table 5.

These rules became effective on June 2, 2014.  FCC has established a transition period:

  • New devices will be permitted to be approved until June 1, 2015 under the old rules
  • Starting June 2, 2016, all devices approved partially or completely under the old rules cannot be marketed, and permissive changes will not be permitted for devices approved under the old rules, unless they meet the requirements of the new rules

MET Labs has the capability to generate the new radar type using Agilent hardware coupled with custom software. Get tested to the latest DFS requirements on new products or update an existing product with a Class II Permissive Change.  Get a free quote now.

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