Evaluation of Marine VHF Radios: Compliance to IEC (International Electrotechnical) Receiver Standards

摘要

The results of these tests show that the Coast Guard and RTCM should consider the following items when developing a marine VHF radio receiver standard based on the IEC standard: the IEC 1097-7 test procedures and performance objectives do not adequately take into account the severe intermodulation and blocking interference that is occurring in major US ports and waterways such as Savannah and New Orleans, the receiver standards should be based on the power levels of the unwanted signals that have been measured in Savannah and New Orleans, and the intermodulation rejection ratio test should be referenced from a specific wanted signal power level and a minimum SINAD, rather than a receivers maximum usable sensitivity for a 20 dB SINAD.