47 C.F.R. § 2.1507 Test frequencies.
Title 47 - Telecommunication
Testing of an EPIRB for compliance outside a shielded room on a distress frequency is prohibited, since this may interfere with emergency communications. Therefore, all compliance testing outside a shielded room should be conducted on one of the pairs of alternate frequencies specified below:
121.600/243.200 MHz 121.650/243.300 MHz 121.700/243.400 MHz 121.750/243.500 MHz 121.800/243.600 MHz 121.850/243.700 MHz 121.900/243.800 MHz The above frequencies are to be used for limited testing of EPIRBs for compliance with FCC Rules, subject to the following conditions: (a) The testing shall not cause harmful interference to authorized communications on these frequencies. (b) The testing shall be coordinated with the nearest FCC district office. For simplicity, 121.5 MHz and 243 MHz will be used throughout this test procedure to indicate the alternate test frequency.
Title 47: Telecommunication
PART 2—FREQUENCY ALLOCATIONS AND RADIO TREATY MATTERS; GENERAL RULES AND REGULATIONS
Subpart N—FCC Procedure for Testing Class A, B and S Emergency Position Indicating Radiobeacons (EPIRBs)
Environmental and Operational Test Procedures
§ 2.1507 Test frequencies.
