Modules
The Atom GNSS timing system includes two types of modules: Atom GNSS modules and clock/time processing modules on routers.
Related Modules
Figure 1 Atom GNSS timing
Atom GNSS timing involves two modules: Atom GNSS timing module and clock/time processing module on the router.
Atom GNSS Modules
- GNSS antenna: receives signals from GNSS satellites.
- GNSS receiver: processes GNSS RF signals and obtains frequency and time information from the GNSS RF signals.
Phase-locked loop (PLL):
Frequency PLL: locks the 1PPS reference clocks and outputs a high-frequency clock.
- Analog PLL (APLL): multiplies the system clock to a higher frequency clock.
- Time PLL: locks the UTC time and outputs the system time.
- Real-time clock (RTC): provides real-time timestamps for PTP event messages.
- PTP grandmaster (GM): functions as the SyncE slave to obtain SyncE clock data.
Clock/Time Processing Modules on routers
An Atom GNSS module must work in conjunction with clock/time
processing modules to implement clock and time synchronization. routers support two types of clock/time processing modules:
- SyncE Slave: This module is used to obtain SyncE clock data.
- PTP BC: This module typically functions as a slave BC to process PTP messages and extract PTP information.