200e

Serge spec calls for a 5 volt gate. That said, there are some modules
that just shoot a comparator to the positive rail and call it a gate,
like the middle of a SSG. However, in the case of a TKB you would most
likely have to mod it to send out a hotter gate.

Mark






--- In 200e@yahoogroups.com, "ezra buchla" <ezra.buchla@...> wrote:
>
> hm... i think i said that backwards in the old post. it was true for
> whatever i was actually looking at, which may have been an original
> 281,  or maybe some weird flavor of 249e.
> 
> BUT the 200e spec says that pulses are triggered on the rising edge of
> the 10v transient pulse. (lo -> hi transition); that said, i'm not
> totally sure that this is how pulse detection is implemented on all
> modules. it's unlikely we would notice if it was backwards because the
> 10v transients are so very very short.
> 
> if you are actually using a pulse generator where the 10v segments are
> long enough that it makes a difference, then you should be able to
> discern the 2__e-s behavior from that setup.
> if you can't discern the behavior, it's probably a moot point.
> if you can, and it's negative-edge triggered, that's technically a
> bug, and could be fixed pretty easily (in firmware).
> 
> i don't really know what serge pulses look like... if they don't go at
> least above 8v, they will not be recognized as pulses by 200e modules.
> 
> -eb
> 
> 
> On Thu, May 29, 2008 at 1:53 PM, jjsynth <jjsynth@...> wrote:
> > falling edge: that i extrapolated from a post by ezra buchla (msg
> > #618) where he explains about pulses used for clocking a sequencer. he
> > wrote: ... you could also use an analog pulse as a clock any voltage
> > with a
> > (>=10v) -> (<10v) transition will work as long as the voltage source
> > and the 200e share a ground. ... which I interpreted as triggering on
> > the falling edge of the pulse. But maybe I'm completely wrong, that's
> > why I asked.
> >
> > regards,
> >
> > J
> >
> > --- In 200e@yahoogroups.com, "Mark Verbos" <verbos2002@> wrote:
> >>
> >> Who said Buchlas trigger on the falling edge of a trigger? A 281
has a
> >> switch to select between AD and AR responses. What's happening when
> >> that switch is thrown is that the level is being shifted so that the
> >> input comparator is responding to either the 10 volt spike at the
> >> beginning or the 5 volt gate (with duration). The length of the spike
> >> at the beginning of a Buchla pulse is very short, but that really has
> >> no bearing on the speed of the triggering. I would worry more about
> >> the Serge sending out 5 volt gates. With those, you should be unable
> >> to use the AR mode on the 281.
> >>
> >>
> >> Mark
> >>
> >>
> >>
> >>
> >>
> >> --- In 200e@yahoogroups.com, "jjsynth" <jjsynth@> wrote:
> >> >
> >> > hello,
> >> >
> >> > after reading most of the posts in the archive I've come to
understand
> >> > that the falling edge of a pulse with a max level > 10V serves as a
> >> > trigger (leading me to believe that this trigger pulse must have a
> >> > very short duration). Has anyone in the group successfully
triggered a
> >> > 281e from a Serge? I have read that someone uses a TKB with his
> >> > Buchla, but I am not sure how you would get a trigger to the Buchla
> >> > that is in sync with other envelopes in the Serge when these are
> >> > triggered on the rising edge whereas the Buchla triggers in the
> >> > falling edge...
> >> >
> >> > thank you for your help,
> >> >
> >> > J
> >> >
> >>
> >
> >
>