Ingo,

you are right. The description of the sockets #5 and #6 are mixed up in
section 3. The manual has been corrected is already available on our web
site (both English and German). In the sketch the missing LP out socket has
been added too.

I will check why the LP setting influences the PC output. I assume that the
PC outputs of the PLL circuit have a higher impendance (probably some kOhm)
than expected. As the LP is a very simple RC type (1k fixed resistor + 50k
potentiometer + 10u capacitor) it may load the PC output as in the highest
frequency setting it loads the PC output with 1k against 10u and may
consequently affect even the PC output. An additional buffer in the PC
output (between PC output and LP input) would decouple the PC output from
the LP. I will see if I can find a simple solution. Another solution would
be to disconnect the PC output from the LP input as soon as a plug is
inserted into the PC out socket by using the switching contact of the PC
output socket.

Best wishes
Dieter Doepfer

> -----Ursprüngliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com
> [mailto: Doepfer_a100@yahoogroups.com ]Im Auftrag von selfoscillate
> Gesendet: Donnerstag, 19. Mai 2005 07:52
> An: Doepfer_a100@yahoogroups.com
> Betreff: 1 Re: a196 pll patch examples
>
>
>
> hello dieter,
>
> you are right, i apologize for the false information.
> the a196 front panel is absolutely correct.
> but i have a good excuse ;-)
>
> a few days ago i discovered that the lowpass frequency
> knob is still altering the signal output of the pll,
> even when the phase comp output is connected directly
> to the cv input of the vco part. this was surprising,
> i assumed that the lowpass part would be completely
> bypassed in this case. then the question about the
> description of my patch examples came up. while in the
> office, i checked the user manual about it and posted
> my "false information". and that's the problem, the
> user manual is wrong. please check section 3 (overview),
> outputs 5 and 6 are swapped there (on both english and
> german versions).
>
> best wishes
>
> ingo
>
>
>
> --- In Doepfer_a100@yahoogroups.com , "selfoscillate"
> <synaptic_music@y...> wrote:
> >
> > hello dieter,
> >
> > well, i stand corrected :-)
> > but there is one thing which i don't understand.
> > if i recall right and i patch a cable from phase comp output
> > to the vco cv input, the lowpass pot is still functional.
> > why is that
> >
> > best wishes
> >
> > ingo
> >
> >
> >
> >
> > --- In Doepfer_a100@yahoogroups.com , "Dieter Doepfer"
> <hardware@d...>
> > wrote:
> > > Ingo,
> > >
> > > I'm sorry but I have to contradict. Roland Mayer, who is no
> longer
> > in the
> > > company, had the A-196 under his wings. It took a while for me to
> > find out
> > > the internal connections and normalling (I had to check the
> > schematics, the
> > > front panel layout and the manual). Please find my replies in the
> > text.
> > >
> > > > -----Ursprüngliche Nachricht-----
> > > > Von: Doepfer_a100@yahoogroups.com
> > > > [mailto: Doepfer_a100@yahoogroups.com ]Im Auftrag von
> selfoscillate
> > > > Gesendet: Mittwoch, 18. Mai 2005 07:55
> > > > An: Doepfer_a100@yahoogroups.com
> > > > Betreff: 1 Re: a196 pll patch examples
> > > >
> > > >
> > > >
> > > > hello tom,
> > > >
> > > > the a196 front panel layout is not very clear.
> > > > the output of the a196 lowpass part is
> > > > the unfiltered signal, while the ouput
> > > > of the phase comparator is the filtered one.
> > >
> > > No. The socket labelled "Out" in the "Phase Comp." section (below
> > the "Type"
> > > switch) is the unfiltered Phase comparator output (connected via
> a
> > 1k
> > > protection resistor to PC1, PC2 or PC3 of the phase comparator
> > according to
> > > the position of the "Type" switch). The socket labelled "Out" in
> > the "Low
> > > Pass" section is the low pass filtered signal of the PC1/PC2/PC3
> > signal.
> > > Both sockets are not normalled as they are outputs (in general
> > outputs are
> > > not normalled but only inputs).
> > >
> > > > this is stated in the manual, but imho the
> > > > placement of the jacks is not optimal and
> > > > can lead to some confusion, because the layout
> > > > of the module and the printing on the panel
> > > > suggest that it is the other way around.
> > >
> > > I think the front panel printing is correct.
> > >
> > > May be a small mistake in the user's manual caused the
> > misunderstanding. The
> > > lowpass output socket is not shown in the sketch on page 3 of the
> > manual but
> > > only the normalled CV input socket of the VCO. I will add lowpass
> > output
> > > socket to the sketch of the manual and use the same labels as on
> > the front
> > > panel. I hope this will help to solve some misunderstandings.
> > >
> > > Best wishes
> > > Dieter Doepfer
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>