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I am not sure I understood this part. Are you suggesting to use the pulse as clock for all the counter FFs? How about that using gray-code?
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Nope. The pulse should clock a single FF. The output of this FF should be sampled by the system clock, thus bringing it in the synchronous domain. This status would be used as clock enable for the actual counter. Then, the next system clock event will reset the FF and make it ready to latch the following pulse.
Anyway in your last post you talked of superposed pulses: in this case the method doesn't apply, since you'll miss the pulse edges whenever they merge.
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