Five Minute Facts About Packet Timing This post discusses GNSS jamming, for a discusstion of GNSS Spoofing see the follow up post. Before a timeserver transmits messages with timing information it usually gets that information from a GNSS … [Continue reading]
The Sync Monitor reverse PTP mechanism
Five Minute Facts About Packet Timing By Doug Arnold Since timing is a critical component of many networked systems, there is a desire among network operators to measure the time distribution performance in their networks. This includes … [Continue reading]
TLVs in PTP Messages
Five Minute Facts About Packet Timing By Doug Arnold What is with al of these TLVs in the Precision Time Protocol?Let’s start at the beginning, TLV stands for “type, length, value.” It is a general means to extend a PTP message with some … [Continue reading]
Performance Level Options for the Meinberg HPS100 card
Five Minute Facts About Packet Timing By Andreja Jarc. I promised you in my earlier post, that I will update you on how to pick the right license model and performance level of your High-Performance Synchronization (HPS100) card. Each … [Continue reading]
Meinberg High-Performance Sync card (HPS100)
Five Minute Facts About Packet Timing By Andreja Jarc. Those of you who know Meinberg may have noticed that Meinberg typically does not talk about licenses. The reason for this is, that Meinberg, in most cases, does not charge you extra for … [Continue reading]
What’s in the 2019 edition of IEEE 1588: Performance Monitoring
Five Minute Facts About Packet Timing By Doug Arnold Every implementation of PTP includes some information about the state and performance of the device. So in principle a monitoring node could gather all the data and determine the health … [Continue reading]
What’s in the 2019 edition of IEEE 1588: Profile isolation
Five Minute Facts About Packet Timing Next in the series on What is in the 2019 edition of IEEE 1588 is profile isolation. And while we are looking at that we will take a peak at the PTP common message header, the part of PTP message which … [Continue reading]
Use Cases for Timing in Power Grids
Five Minute Facts About Packet TimingBy Andreja Jarc. Evolution of Grids The power grid has been operating for a long time, long before data networks and ethernet systems were popular. It is one of the world's largest infrastructures and also … [Continue reading]
What’s in the 2019 edition of 1588: Slave port monitoring
Five Minute Facts About Packet Timing By Doug Arnold Next in the series on What is in the 2019 edition of IEEE 1588 is slave port monitoring, also known as slave event monitoring. Sometimes it is not enough to transfer time accurately from a PTP … [Continue reading]
PTP Timescale (and what the heck is Arb time?)
Five Minute Facts About Packet Timing By Doug Arnold Most application which use PTP to distribute time, don’t actually need standard time, as understood by national laboratories. All that is needed is for the clocks in a network to have … [Continue reading]