> Yes Dieter,
>
> Gutemorgen :-) ... Exactly that's what I didn't pay attention to.
> The pulsewidth....
> But because all other clockmodules responded well to that same pulse.
>
> Thanks the wakeupcall.
>
> Jacco Ville

It has to do with the fact that the A-157 has a microcontroller that "polls" the clock input. If the incoming pulse is too short it
may overlook the clock signal. Hardware based clock modules (like A-160, A-161) do not have this problem as they are made from
hardware digital logic elements (no microcontrollers). I had a discussion with other module manufacturers during the Superbooth and
we think about an expansion of the eurorack standard that includes also specs like minimum trigger length (1 ms or 5ms are under
discussion) and minimum gate/trigger levels. Some manufacturers voted for 3V (because they use internal controllers with 3.3V
supplies and want to keep the circuits as simple as possible) but I'd recommend at least 5V even if this requires additional level
shifters (for some of our modules these level shifters are 30% or more of the circuit, e.g. A-160-1/2, A-161).

Best wishes
Dieter Doepfer