请教一个关于jitter的问题
时间:12-12
整理:3721RD
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以下内容摘自wiki
http://en.wikipedia.org/wiki/Jitter
Total jitter
Total jitter (T) is the combination of random jitter (R) and deterministic jitter (D):
T = Dpeak-to-peak + 2× n×Rrms,
in which the value of n is based on the bit error rate (BER) required of the link.
A common bit error rate used in communication standards such as Ethernet is 10^-12.
n BER
6.4 10^-10
6.7 10^-11
7 10^-12
7.3 10^-13
7.6 10^-14
为什么误码率越低,对应的总jitter的值也越大?
如果系统已经确定了,则的D和R也就确定,那么T为什么会根据ber而变化呢?
http://en.wikipedia.org/wiki/Jitter
Total jitter
Total jitter (T) is the combination of random jitter (R) and deterministic jitter (D):
T = Dpeak-to-peak + 2× n×Rrms,
in which the value of n is based on the bit error rate (BER) required of the link.
A common bit error rate used in communication standards such as Ethernet is 10^-12.
n BER
6.4 10^-10
6.7 10^-11
7 10^-12
7.3 10^-13
7.6 10^-14
为什么误码率越低,对应的总jitter的值也越大?
如果系统已经确定了,则的D和R也就确定,那么T为什么会根据ber而变化呢?
我的理解是这个jitter是指jitter budget,也就是接收机能容忍的data里面混进的最大jitter值,接收机performance越好应该能容忍的TJ越大BER越小。