Grandmasters, reference clocks and holdover.

7 technologies in spectrum, timing and PNT.

Technologies

PRTC and enhanced PRTC GNSS-traceable time references at 100 ns or 30 ns accuracy that anchor a timing network.
Primary reference clocks for frequency Frequency references for SyncE and legacy networks.
Atomic and quartz oscillators Caesium, rubidium, chip-scale atomic and oven-controlled quartz oscillators chosen by holdover needs.
Holdover design Keeping time within budget for hours or days when GNSS is lost.
Timing performance monitoring Measuring time error, MTIE and TDEV across the network to catch degradation early.
Traceability to national time scales Linking network time to UTC through a national metrology institute.
Edge and distributed grandmasters Grandmaster functions at cell sites and edge nodes to shorten timing chains.