What is jitter in clock?
Clock jitter is deviation of a clock edge from its ideal location. Understanding clock jitter is very important in applications as it plays a key role in the timing budget in a system. Clock timing jitter can be measured in time domain and in frequency domain.
How do I get rid of the jitter on my clock?
Decreasing the jitter of the system clock circuit can be achieved in many ways, including improving the clock source, as discussed, as well as filtering, frequency division, and proper choice of clock circuit hardware.
How is clock jitter calculated?
The standard procedure for measuring cycle-to-cycle jitter involves randomly measuring the duration of two clock periods 10,000 times, and taking the absolute difference between the two. Typically, a histogram is necessary to plot the measurement values against the frequency of occurrence of the measurements.
What frequency do atomic clocks use?
60 kHz
WWVB broadcasts on a frequency of 60 kHz. Your radio controlled clock actually has a miniature radio receiver inside, which is permanently tuned to receive the 60 kHz signal….How They Work.
| Time Zone | Difference from UTC During Standard Time | Difference from UTC During Daylight Time |
|---|---|---|
| Eastern | -5 hours | -4 hours |
What is a good jitter speed?
Ideally, jitter should be below 30ms. Packet loss should be no more than 1%, and network latency shouldn’t exceed 150 ms one-way (300 ms return).
What is a jitter attenuator?
A jitter attenuator (aka jitter cleaner) is used to reduce the magnitude of jitter on a given timing signal. Jitter can be defined as the undesired deviation from an ideal periodic timing signal, and may be observed in characteristics such as the frequency, phase, or amplitude of successive pulses.
How do I reduce the jitter in my signal?
To reduce deterministic jitter, adding pre-emphasis (or de-emphasis) helps by improving the signal’s high-frequency content. The linear loss of a transmission line looks like a low-pass filter and, by increasing the high-frequency content, improves SNR.
How does a jitter cleaner work?
The typical use case of a dual loop jitter cleaner is to accept a dirty or low-frequency reference into the first PLL, which operates with a very narrow-loop bandwidth to attenuate reference and PLL noise. The VCO is capable of “cleaning” both the reference oscillator and PLL noise.
What is peak to peak jitter?
Peak-to-peak period jitter is the difference between the largest clock period and the smallest clock period for all individual clock periods within an observation window, typically 1,000 or 10,000 cycles.
How are atomic clocks synchronized?
Atomic clocks automatically synchronize to a radio signal called WWVB that the National Institute of Standards and Technology (NIST) broadcasts continuously from Fort Collins, Colorado. This signal transmits the official time from the Atomic Clock in Boulder, Colorado.
Which is the most accurate atomic clock?
Atomic clocks are the most accurate time and frequency standards known, and are used as primary standards for international time distribution services, to control the wave frequency of television broadcasts, and in global navigation satellite systems such as GPS….
| Atomic clock | |
|---|---|
| Powered | Yes |