Doepfer

When I was noodling on my system, the bottom S&H on the A148 went
glitchy (short spurts of noise at the start of every trigger) out of
the blue. Thinking it was getting modulated by some other module, I
disconnected everything and tried it again. Same glitch. Plugged the
system out, again the same thing happened. I then tried the top S&H
thinking it was glitchy too, but it was working perfectly.

Even though I fixed this problem by disconnecting the module and
checking the jumper settings, I'm afraid the same problem will arise
again like the last time. I'd hate to continously connect/disconnect
the module to get it working because it's too much hassle.

Has anyone else experienced something like this?

> -----Ursprüngliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com
> [mailto:Doepfer_a100@yahoogroups.com]Im Auftrag von shleedance
> Gesendet: Donnerstag, 19. Juli 2007 03:44
> An: Doepfer_a100@yahoogroups.com
> Betreff: [Doepfer_a100] Glitchy a148
>
>
> When I was noodling on my system, the bottom S&H on the A148 went
> glitchy (short spurts of noise at the start of every trigger) out of
> the blue. Thinking it was getting modulated by some other module, I
> disconnected everything and tried it again. Same glitch. Plugged the
> system out, again the same thing happened. I then tried the top S&H
> thinking it was glitchy too, but it was working perfectly.
>
> Even though I fixed this problem by disconnecting the module and
> checking the jumper settings, I'm afraid the same problem will arise
> again like the last time. I'd hate to continously connect/disconnect
> the module to get it working because it's too much hassle.
>
> Has anyone else experienced something like this?

The new version of the S&H module A-148 has two jumpers available that are
used to choose between S&H (sample and hold) or T&H (track&hold) for each
sub-unit. For the upper sub-unit the left position of the jumper JP2 stands
for S&H, the right for T&H. For the lower sub-unit the lower position of the
jumper JP3 stands for S&H, the upper for T&H.

In T&H mode the output signal follows the input signal while the trigger
input is "high". As soon as the trigger input turns to "low" the last
voltage is stored. The factory setting is S&H for the upper device and T&H
for the lower device. In addition the complete A-100 voltage
range -12...+12V can be processed by the new version of the A-148 (no longer
limited to -8...+8V as for the previous version).

Best wishes
Dieter Doepfer


The difference between S&H and T&H is desc+#

--- In Doepfer_a100@yahoogroups.com, <hardware@...> wrote:
>
> > -----Ursprüngliche Nachricht-----
> > Von: Doepfer_a100@yahoogroups.com
> > [mailto:Doepfer_a100@yahoogroups.com]Im Auftrag von shleedance
> > Gesendet: Donnerstag, 19. Juli 2007 03:44
> > An: Doepfer_a100@yahoogroups.com
> > Betreff: [Doepfer_a100] Glitchy a148
> >
> >
> > When I was noodling on my system, the bottom S&H on the A148 went
> > glitchy (short spurts of noise at the start of every trigger) out of
> > the blue. Thinking it was getting modulated by some other module, I
> > disconnected everything and tried it again. Same glitch. Plugged the
> > system out, again the same thing happened. I then tried the top S&H
> > thinking it was glitchy too, but it was working perfectly.
> >
> > Even though I fixed this problem by disconnecting the module and
> > checking the jumper settings, I'm afraid the same problem will arise
> > again like the last time. I'd hate to continously connect/disconnect
> > the module to get it working because it's too much hassle.
> >
> > Has anyone else experienced something like this?
> 
> The new version of the S&H module A-148 has two jumpers available
that are
> used to choose between S&H (sample and hold) or T&H (track&hold) for
each
> sub-unit. For the upper sub-unit the left position of the jumper JP2
stands
> for S&H, the right for T&H. For the lower sub-unit the lower
position of the
> jumper JP3 stands for S&H, the upper for T&H.
> 
> In T&H mode the output signal follows the input signal while the trigger
> input is "high". As soon as the trigger input turns to "low" the last
> voltage is stored. The factory setting is S&H for the upper device
and T&H
> for the lower device. In addition the complete A-100 voltage
> range -12...+12V can be processed by the new version of the A-148
(no longer
> limited to -8...+8V as for the previous version).
> 
> Best wishes
> Dieter Doepfer
> 
> 
> The difference between S&H and T&H is desc+#
>

Ah I see, so the bottom S&H wasn't glitchy at all, but was doing T&H
instead? Thanks for clearing that up. :)