Siemens SIMEAS Q80 Operating Instruction page 120

E-44 SIMEAS Q80 7KG8080
10.3.3.3 IRIG-B time
IRIG-B time: Each device is synchronized to absolute IRIG-B time and thus all devices are mutually synchronized
10.3.3.4 NTP time via LAN
NTP time via LAN: Each device is synchronized to absolute NTP time. The mutual synchronization is limited, since
NTP typically only achieves precision to a range of 10 ms to 20 ms.
Power Quality Recorder SIMEAS Q80 7KG8080, Operating instruction
E50417-B1074-C419-A2, Release 09.02.2011
Example for synchronization with IRIG-B for stand alone devices
Example for synchronization with NTP for stand alone devices