Archive for the ‘Timing & Synchronization’ Category

Network Time Servers: Is Security Hardening Disclosure a Roadmap for Exploitation?

I think we would agree the publishing of Common Vulnerabilities and Exposures (CVEs) is a very useful mechanism to collectively evolve and harden our networks and products. It starts the timer, if you will, on a race between the black hats and organizations to respectively exploit or neutralize the CVE. Read more »

Microsemi’s Space Chip-Scale Atomic Clock Update: Customers Appreciate Careful COTS Design

As we continue to introduce Space CSAC to the market, it is important to point out that while customers bring varying requirements when seeking an atomic reference for space missions, they share a curiosity about how the CSAC becomes a Space CSAC. Read more »

Banking Security Eclipses Accuracy in a Network Time Server

Things change in unexpected ways, even in network time servers, which in their most basic form are “just clocks.” Back in the day, new software releases came out chock full of new features and, to a lesser extent, bug fixes. We promoted those new features and benefits Read more »

Five Dangers of Poor Network Timekeeping + Easy and Cost Effective Solutions (Part 9 of 10)

In the second part of “providing good network time,” this article will go into more detail on redundant time sources, reliable time synchronization, secure time source, ease-of-use, and cost efficiency. Read more »

Five Dangers of Poor Network Timekeeping + Easy and Cost Effective Solutions (Part 5 of 10)

How organizations keep track of time has a major impact on the overall security of the organization’s IT infrastructure, for two reasons. First, the mechanisms used to keep track of time are among the most vulnerable to exploitation by a hacker. Read more »

Five Dangers of Poor Network Timekeeping + Easy and Cost Effective Solutions (Part 3 of 10)

In the first post of this series, we wrote about how most organizations today rely on networks of computers, all of which rely on clocks. If the clocks in these computers don’t agree with each other or reflect the correct time, it’s a bomb ticking away in the heart of IT infrastructure. Read more »

Five Dangers of Poor Network Timekeeping + Easy and Cost Effective Solutions (Part 2 of 10)

In the first post of this series, we wrote about how most organizations today rely on networks of computers, all of which rely on clocks. If the clocks in these computers don’t agree with each other or reflect the correct time, it’s a bomb ticking away Read more »

5 Essential Elements of Network Time Synchronization: Element 4 (Part 6 of 8)

The Five Elements – Part 4: Robust Network Time Management

Managing a network of devices as a whole is different from managing specific devices. The availability and reliability of accurate time across the entire network—not just a part of it—must be guaranteed. Read more »

5 Essential Elements of Network Time Synchronization: Element 2 (Part 4 of 8)

The Five Elements – Part 2: A Timekeeping Architecture that Fits

Acquiring UTC from GPS requires taking the signal off the air and delivering it to the clients (PCs, workstations, servers, controllers, etc.) that rely on accurate time Read more »

Network-Based Time Delivery for 5G: Low Latency, Scalable Synchronization in Highly

In the past couple of articles in this series, my colleague, Barry Dropping, wrote about wireless networks, specifically laying the groundwork for 5G and the standards for distribution of time and phase in these networks. Read more »

Microsemi’s TimeProvider 4100 Enables Denmark’s Stofa to Launch First Trial of Remote PHY in Europe

Microsemi has enabled cable TV and internet provider Stofa, based in Denmark, to successfully complete the first trial in Europe deploying a new type of architecture—Remote PHY (R-PHY)—based upon the DOCSIS® 3.1 standard in Europe. Read more »

Microsemi’s SyncServer S80 Wins Security Industry Association’s Network Support Solutions Award

ALISO VIEJO, Calif., April 25, 2018 /PRNewswire/ — Microsemi Corporation (Nasdaq: MSCC), a leading provider of semiconductor solutions differentiated by power, security, reliability and performance, today announced it is the recipient of the Security Industry Association’s (SIA) New Product Showcase (NPS) award Read more »

If You Can’t Measure It, You Can’t Fix It

As timing and synchronization has grown in importance within Critical Infrastructure networks, centralized management and visibility of this vital function has become essential Read more »

GNSS Errors Impacting Position, Navigation, and Timing (PNT)

GNSS errors and anomalies can be caused by a range of issues. Because real world signals from the satellites do not travel in a vacuum, but pass through Read more »

Protecting Critical Infrastructure: Time May Not Be on Your Side

GPS revolutionized the world with its ability to provide an accurate, reliable, and cost-effective positioning, navigation, and timing (PNT) service with Read more »

MiFID II Compliance: Is Your Network Time Server ‟Reliable Enough?”

In recent articles, I’ve talked about ESMA’s MiFID II requirements and how this regulation – effective January 2018 – will require trading systems to time stamp key trading event records within an assured level of accuracy… Read more »

New SyncServer S80 NTP Network Time Server Delivers for Physical Security Networks

Microsemi also recently announced the availability of the SyncServer S80 Network Time Server that integrates the GPS antenna, receiver, and Network Time Protocol (NTP) timing server into a single ruggedized, environmentally-hardened unit ideal for outdoor installation with physical security systems. Read more »

Understanding Power Supply Rejection Ratio

What is PSRR?

Power Supply Rejection Ratio or Power Supply Ripple Rejection (PSRR) is a measure of how well a circuit rejects noise, of various frequencies, injected at its voltage input.  The ripple can be induced from a number of sources, such as a 50Hz/60Hz supply ripple, a switching ripple from a DC/DC converter, or a ripple due to the sharing of an input supply between different circuit blocks on the board.  In the timing solutions world, when discussing PSRR we are typically referring to supply ripple.

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Understanding VCXO Specifications: APR

Like most oscillators, VCXOs have many specifications. APR – Absolute Pull Range – is a single specification that combines many of them to make selection easy. The term “Pull” is unique to the oscillator industry and refers to the small frequency tuning available via the voltage control pin. Pull is measured as df/fnom in ppm.

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