A.首周波檢測(cè)功能 B.采樣同步功能 C.對(duì)時(shí)功能 D.守時(shí)功能
A.IRIG-B B.1PPS C.1PPM D.1PPH
A.IEC61850-9-1 B.IEEE1588 C.IEC61850-9-2 D.IEC60044-8