> Just a minor question on the PLL. In the manual it states that
> PC2 is linked to the LED. However there is a fair amount of
> activity occurring when using the other two modes. What is the
> light indicating if not locking
>
> Thanks for any help in understanding this.
>
> Raul Pena

The data sheet of the PLL circuit (74HC4046) mentions the function of this
pin (PCPout) only if phase comparatur PC2 is used (the PCPout is part of the
PC2 circuit). In this case it works as a "locked indicator". The data sheet
does not say what this pin does if PC1 or PC3 are used.

Best wishes
Dieter Doepfer