Doepfer

thank you-
it is not a big matter, because if i need to use the "pure" phase 
comparator out i can adjust the 50k pot so it's not filtering the 
signal.  in any case, i'd be curious what the real cause is and how 
you'd "solve" the problem.
--tom


> 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

> >