C94-M8P - User GuideUBX-15031066 - R07 Early Production Information AppendixPage 35 of 47AppendixA GlossaryAbbreviation DefinitionBeiDou Chinese satellite systemECEF Earth Center Earth Fixed formatGLONASS Russian satellite systemGND GroundGNSS Global Navigation Satellite SystemGPS Global Positioning SystemMB Moving BaselinePCB Printed circuit boardPLL Phase Locked LoopPPS Pulse Per SecondQZSS Quasi-Zenith Satellite SystemRAIM Receiver Autonomous Integrity MonitoringRF Radio FrequencyRTCM Radio Technical Commission for Maritime ServicesRTK Real Time KinematicTTFF Time To First FixUART Universal Asynchronous Receiver/TransmitterTable 4: Explanation of abbreviations usedB Radio communication link configurationUsers do not need to make any configuration for the Radio communication link. The u-blox defaultconfigurations are tested and verified.Users need to take all responsibility for any changes against the default configuration.By default, u-blox has configured the radio link module to meet local radio frequency requirements. TheC94-M8P application boards are labeled according to different radio modem variants as follows: C94-M8P-1 for China C94-M8P-2 for USA and Canada C94-M8P-3 for Europe C94-M8P-4 for JapanThe default radio-link configurations in shipped C94-M8P boards are listed below: