Hi Zoran and members,

Have you checked your PSU I recently changed the A-100 PSU to a new
Power-one +-12 at 1.5A, +5 at 3A and now all VCOs are drift free, all
modules very stable and the leds blink never affect other modules. Also
check your ground connections searching for ground loops, a ggod ground
is esential for some modules.

Best Regards,

Josue.