Doepfer

Hello everybody,
my english is not very good but i try to explain my problems.
when i use the A-188-2, if i try to use the delay knob in his first
half, all the output give a high  frequency ( depend on the delay )
sound and i can't suppress it without going thru a LP-VCF wich
drastically modify my sound, A notch filter does'nt supress it because
it's not a sinus sound. Is this sound the clock sound wich is describe
in the module's presentation ?
My second problem is when i try to use the clock in : what kind of
signal have i to put in, is it only to chain BBD modules ?
Third, i haven't really understood the use of the CV out on this
module : what exactly is going out.
thanks for your answer.

Patrick Maurel