hi damian，as you said,when the bit rate increase,the dispersion should be spread,then the jitter would be lager than those low bit rate.however,from my slide or project ,you can find that it is not the same but inverse function.I really confused about that.as far as i know,i we increase the bit rate ,the jitter should be larger.can you help me understand it ?(In my opinion,the jitter is relative to the time length between the samples point.for example,if the bit rate is low like 1Mbps,if we set the samples per bit 32,then the time length should be ~30ns(1us/32) and the jitter should be the same level.if we increase the bit rate to 1Gbps, the time length should be ~30ps(1ns/32)then the jitter should be that level.as a conclusion,if we increase the bit rate and decrease the samples per bit to make the time length between the samples point the same level,the jitter should be also the same level.however,i found that is not true.)
Also i found that the jitter increase when the sample rate increase.so is it right that the jitter value getting from the high sample rate will be more accurate.