[ntp:questions] calculating peak to peak error

Drk Ryan ryandrk at hotmail.com
Wed Aug 27 19:40:06 UTC 2003

>>Without the kernel PLL, the time obtained will have an error
component that >>is a sawtooth shape and has a max peak to peak
amplitude of about 500us, at a >>CPU clock frequency error of 250ppm. 
A well managed system will have a >>frequency error of close to 50ppm,
in which case the peak to peak error >>should be short of 200 us.

How is the 200us calculated?

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