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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.
What is unit of jitter?
The units of jitter measurement are picoseconds peak-to-peak (ps p-p), rms, and percent of the unit interval (UI). The p-p measurement states the maximum to minimum amount of time deviation, usually in picoseconds. Jitter also is expressed as a percentage of time compared to the UI or one bit time.
What is absolute jitter?
Absolute jitter. The absolute difference in the position of a clock’s edge from where it would ideally be. Period jitter (a.k.a. cycle jitter) The difference between any one clock period and the ideal or average clock period.
How can deterministic jitter be reduced?
Careful layout, which should include minimizing discontinuities and placing termination of transmissions lines as close to the end as possible, can reduce the effects of deterministic jitter. For random (unbounded) jitter, there comes a point where these techniques won’t provide enough compensation.
Is the jitter in ppm the same as in NS?
But if you know the mean value you can. ppm is simply “Parts Per Million”, which works exactly like a percentage. One part per million (1 ppm) means 1/1000000th, or 1% is 10000 ppm. If the time-base is one milisecond (1 kHz) and the jitter is one ppm, the jitter will be one millionth of 1 ms, or 1 ns.
Which is the peak to peak jitter for RMS?
As an example, the peak-to-peak jitter can be found at a BER = 10-10 when the RMS jitter is 5ps. 2 10−10 =1 . The example shows that: Jitter −P P =α*JitterRMS The answer is JitterP-P = 12.723*5ps = 63.61ps.
What is the difference between frequency and jitter?
Frequency is only the average number of clock cycles in a second. Jitter is about the variance of the clock period. So, if your clock period varies randomly by Tj=10ns RMS (for example) but the period is still 1µs on average, then you can have a very accurate (but jittery) 1MHz clock.
What is the difference between jitter and accuracy?
Jitter is about the variance of the clock period. So, if your clock period varies randomly by Tj=10ns RMS (for example) but the period is still 1µs on average, then you can have a very accurate (but jittery) 1MHz clock. EDIT: …however if the accuracy is given in µs/minute (for example) then it is accuracy and not jitter.