They define an equivalent antenna as well.Įquivalent antennas must be of the same type (e.g., yagi, dish, etc.), must be of equal or less gain than an antenna previously authorized under the same grant of certification (FCC ID), and must have similar in-band and out-of-band characteristics (consult specification sheet for cutoff frequencies). The summary of these documents is that a Class 1 permissive change is allowed if the new antenna is equivalent to the antenna with which the product was tested. Part 15.204 describes using different antennas and the FCC issued KDB Publication 178919 D01 to provide more specific details on permissive changes, including speaking specifically to antenna changes. The Class 1 is preferred because no testing or filing is required. The modified equipment shall not be marketed under the existing grant of certification prior to an acknowledgment that the change is acceptable.Ī Class III permissive change includes modifications to the software of a software defined radio transmitter that change the frequency range, modulation type or maximum output power (either radiated or conducted) outside the parameters previously approved, or that change the circumstances under which the transmitter operates in accordance with Commission rules.Ĭhanges to the antenna will fall under either a Class 1 or Class 2 permissive change. When a Class II permissive change is made by the grantee, the grantee shall provide complete information and the results of tests of the characteristics affected by such change. Such degraded performance must still meet the minimum requirements of the applicable rules.

No filing is required for a Class I permissive change.Ī Class II permissive change includes those modifications which degrade the performance characteristics as reported to the Commission at the time of the initial certification. The answer is yes, but with some strings attached.ĬFR 47 Part 2.1043 defines three types of permissive changes:Ī Class I permissive change includes those modifications in the equipment which do not degrade the characteristics reported by the manufacturer and accepted by the Commission when certification is granted. We are often asked if it is possible to change the antenna that is used with a product after the product has FCC certification.

Changing Your Antenna After FCC Certification?

Fcc id number lookup