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Inside Frequency Control

Key Developments in mmWave Radio Spectrum Research

Posted by Bliley Technologies on Apr 29, 2020 8:15:00 AM

5G Wireless is Right Around the Corner thanks to mmWave

Fifth generation wireless systems are not far from becoming a reality, thanks to recent research being done on the millimeter wave (mmWave) radio spectrum.

Experts agree the way forward is to manufacture mass deployable wireless devices across a range of markets and for different applications. Among other things, these applications include mobile computing and data processing over networks. The technology also has applications in the field of medicine and healthcare.

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Topics: engineering, RF Technology

Common Misconceptions About Crystal Oscillator Stability

Posted by Bliley Technologies on Feb 2, 2020 10:14:00 AM

RF engineers would love to get their hands on ideal crystal oscillator circuits. That is, a quartz crystal oscillator that transmits at the designated frequency for the entire life of the device without any frequency deviation. Unfortunately, that ideal circuit world is a mathematical fantasy.

There are many factors that contribute to quartz oscillator stability and frequency drift issues. To prevent these problems as much as possible, having a firm understanding of precise frequency stability will help give you the tools to keep your applications performing optimally. But there's another problem...

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Topics: crystal oscillators, RF Technology

Is a Swept Quartz Crystal Necessary in your Timing Application?

Posted by Rob Rutkowski on Dec 11, 2019 8:45:00 AM

What is a Swept Quartz Crystal?

Like many other things, radiation can impact a crystal oscillator's frequency. This is because radiation physically alters the quartz crystal inside the oscillator (changes position of weakly bound compensators that change the elastic constants of quartz). In some cases, radiation can even impact the crystal series resonance. The increase of resonance can be serious enough to cause the oscillator to stop oscillating if the crystal isn't radiation resistant. When a quartz crystal is manufactured to be radiation resistant, the crystal is referred to as a swept quartz crystal.

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Topics: crystal oscillators, RF Technology

How EFC Over-Specification May Be Costing You (AT vs. SC Cut Crystals)

Posted by Rob Rutkowski on Oct 2, 2019 11:14:09 AM

What if I told you that specifying more Electronic Frequency Control (EFC) than you need could actually be hurting your pocketbook? Well, it very well may be! Paying attention to whether your supplier is using AT cut vs SC cut crystals will help you save money in the long run with OCXOs.

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Topics: crystal oscillators, Clocks & Crystals, RF Technology

6 Innovative Markets Where Precise Timing & Sync Will Be Crucial

Posted by Rob Rutkowski on Aug 6, 2019 8:20:00 AM

Precise timing across a variety of networks and industries is becoming a necessity. Both operationally and legally.  It's actually pretty amazing to see the evolution of timing & frequency control throughout different industries. There's been significant timing innovations over the past 5-10 years alone.

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Topics: Clocks & Crystals, RF Technology

The Ultimate Guide to Atomic Clocks in Space

Posted by Rob Rutkowski on Jul 9, 2019 11:20:13 AM

Do you know all about Atomic Clocks in space and how they work? If not, it's about TIME you do. (Haha. Ha. Ha...)

Timing is everything when it comes to GPS satellites and other space applications. Even just a one microsecond error in timing can lead to an error of 300 meters on the ground. Atomic clocks can maintain very precise timing, making them a great timing solution for GPS and other LEO satellites.

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Topics: Clocks & Crystals, RF Technology, Space & Satellites

How to use Electronic Frequency Control to Enhance Crystal Oscillator Design

Posted by Rob Rutkowski on May 14, 2019 8:45:00 AM

Want to know what's better than a crystal oscillator? A crystal oscillator combined with Electronic Frequency Control (EFC). Of course, it really comes down to your specific application and what requirements you're looking for to determine if EFC would be a good addition to your crystal oscillator circuit design, and if so, which method is best for you.

There are 4 options to choose from when selecting an Electronic Frequency Control method for your crystal oscillator. These 4 options are

  1. Pulse Width Modulation & Low Pass Filter
  2. Reference RF Signal & Phase Locked Loop (PLL)
  3. Voltage Divide
  4. Digital-to-Analog Converter (DAC)

In this post, let's take a closer look at each option and compare the pros and cons between them.

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Topics: crystal oscillators, RF Technology

What You Should Know About Stratum System Levels

Posted by Rob Rutkowski on Sep 18, 2018 9:55:30 AM

What You should know about stratum levels graphic

When it comes to stratum levels and minimum performance requirements for digital network synchronization, there's definitely a lot to know. A standard first released in 1987 entitled "Synchronization Interface Standards for Digital Networks" from the American National Standards Institute (ANSI) lays out all the official information and requirements. 

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Topics: RF Technology

Laser Communication in Space Could Multiply Data Rates by 100x

Posted by Rob Rutkowski on May 15, 2018 8:06:00 AM

Since the beginning of NASA, radio communication has been the go-to method of communication for spacecrafts. Well, that's about to change. NASA has recently announced they will be making a major change to some of their upcoming communication systems by implementing new, cutting-edge, laser communication technology. 

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Topics: RF Technology, Space & Satellites

Vodafone & Nokia Team Up for the Moon's First Mobile Phone Network

Posted by Bliley Technologies on May 8, 2018 8:06:00 AM

A Berlin-based team known as PTScientists (Part Time Scientists) will be celebrating the 50th anniversary of the Apollo 11 moon landing in high-style in 2019. The group was a participant in the private race to the moon, the Google Lunar X Prize, which will wrap up this year without a winner. Their mission for 2019? To bring a 4G wireless mobile network to the moon!

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Topics: Press Release, RF Technology

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