As I'm forever saying, please read the forum guidelines as these politely ask you not to post on the end of very old threads as it makes it much harder for somebody to find a relevant answer later. Anyway, in this case I'd suggest you use a "bit" source (the Source Type being bit): I've used the Rise Delay to allow the duty cycle to be altered - this is using two ADE variables - one for the period of the clock, and the second (DUTY) which is the duty cycle as a percentage (so 25 for 25%). The bit pattern is 01 to generate a regular clock train, with -1 as the number of repetitions (any negative number means continuously repeating). Then because it's a bit source, you can enter the jitter parameters for both random and periodic (deterministic) jitter. It would be good if this was possible for a pulse source, but right now it isn't - however, it's easy enough to implement using a bit source. Regards, Andrew.
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