RF System Synchronization - Baseband
summary
Compares concrete methods for baseband sync on USRP hardware: use a shared 10 MHz reference, distribute PPS for a common timekeeper, and prefer a star/matched‑length topology over daisy chains to avoid converter‑clock and PLL phase ambiguity. Notes FPGA flip‑flop setup/hold metastability and temperature‑driven drift. Reports practical numbers: White Rabbit enables baseband clock and time synchronization of less than 1 ns at distances up to 10 km, and measured ~200 ps typical across 5 km on N310/N320 family.
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chapters (9)
- 0:00Start
- 1:45The Rf Subsystem
- 2:08The Reference Clock Input and Fan Out
- 4:32Data in the Time Domain
- 7:03External Reference Clock
- 18:21Geographically Distributed Systems
- 20:08Introduction
- 22:24Summary
- 23:41Does White Rabbit Require Xilinx Ip
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