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Spirent KB Article
Doc ID: FAQ14011
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Spirent TestCenter : How to use the different Time Sources in IEEE1588v2 emulation?
Below are the details on various Time Source values in IEEE1588v2:
Atomic Clock - Hex Value (0x10)
Any device, or device directly connected to such a device, that is based on atomic resonance for frequency and that has been calibrated against international standards for frequency and if the PTP timescale is used
Terrestrial Radio – Hex Value (0x30)
Any device synchronized via any of the radio distribution systems that distribute time and frequency tied to international standards
PTP – Hex Value (0x40)
Any device synchronized to a PTP based source of time external to the domain
Hand set – Hex Value (0x60)
Used in all cases for any device whose time has been set by means of a human interface based on observation of an international standards source of time to within the claimed clock accuracy
PTP Profile 240, 241, 242 ……. 254 Hex Value (0xF0-0xFE)
For use by alternate PTP profiles
As a test tool, TestCenter allows the user to configure values outside of the ones specified in the standard. The “PTP profile” setting selections allow these non-standard values to be configured for an emulated clock.
Note that these are all values that simply set the appropriate byte values within the PTP messages.
This is for communicating between devices participating in BMCA about the time source.
Product : Spirent TestCenter,Spirent TestCenter,IEEE 1588