DIN EN 301843-4-2018 船用无线电设备和业务的电磁兼容性(EMC)标准.电磁兼容协调标准.第4部分:窄带直接印字电报 (NBDP) 的特殊条件(英文版本EN 301843-4 V2.2.1 (2017-11)的核准本作为德国标准)
ElectroMagnetic Compatibility (EMC) standard for marine radio equipment and services - Harmonised Standard for electromagnetic compatibility - Part 4: Specific conditions for Narrow-Band Direct-Printing (NBDP) NAVTEX receivers (Endorsement of the English
This European Standard (EN) has been developed by the European Standardization Organization ETSI (European Telecommunication Standardization Institute) and specifies requirements in the telecommunications sector.