Doepfer

> I had a question about my new Velleman Panelscope which I've
> managed to hook up to my modular using the 197-2.
>
> I'm rather new to oscilloscopes and I was wondering should I
> expect it to be able to tell me the frequency of a slow-moving
> CV. I'm not seeing a way to read the frequency of a wave.
>
> thanks,
>
> Bryan

You cannot read the frequency from an oscilloscope directly. You have to
measure the period (P) of the waveform (i.e. the time difference between two
peaks or two zero-crossing points) and then calculate the reziprocal value f
= 1/Q. For example if the period is 0.2 seconds the frequency is 1/0.2 = 5
Hz.

There are more expensive digital scopes available that do this job for you.
The frequency is measured by means of two cursors which are manually moved
to the peak or zero-crossing points mentioned above. From the currently
selected time base of the scope and the difference between the cursor points
the frequency is calculated and displayed on the screen. Even scopes with
built in frequency meters are available but these are actually two different
devices built into one case.

Best wishes
Dieter Doepfer