[sdiy] how to view a quantizer staircase on a scope?

[Dan Snazelle]

hmmmm


the output of my quantizer is flat lines that go up and down

so that part is right

but when i set up everything as you said i have no idea what i am looking at and how to properly adjust it!!

i have a pot for reference voltage
i have a pot for input gain

i have been able to get sta

am i supposed to get the little lines that go up and down to fit into the ramp wave in the mode where you see both channel A and channel B?


i might have to stop today. to many hours in this shop and too much time staring at a scope...my eyes are going

thanks







----------------------------------------
> CC: synth-diy at dropmix.xs4all.nl
> From: tom at electricdruid.net
> Subject: Re: [sdiy] how to view a quantizer staircase on a scope?
> Date: Sun, 17 May 2009 21:54:54 +0100
> To: subjectivity at hotmail.com
>
>
> On 17 May 2009, at 21:43, Dan Snazelle wrote:
>
>> 1, i connect the output of the quantizer to my vco input
>
> No, output of quantizer to channel one of scope.
>
>> 2. i connect the square output of the vco into the channel 2 of my
>> scope
>>
>> 3. i set trig mode to channel 2
>
> Yep, both good.
>
>> 4. i plug channel A of the scope INTO the output of the LFO i am
>> driving the quantizer with (a saw wave)
>
> Nope, channel one of scope to output of quantizer (said this already).
>
>> correct?????
>
> Pretty much!!!
>
> There's one thing I'm not clear about; are you driving the quantizer
> with an LFO or a VCO? Either way, let's call it the oscillator. You
> want the oscillator into one channel of the scope (with the
> triggering from that channel) and the quantizer output into the other
> channel. Then you can compare and contrast to your heart's content!
>
> Probably a VCO is easier for testing on a scope than an LFO, since
> you'll be able to display a whole wavecycle without the image
> flickering (which tends to be a problem with slow waveforms).
>
> HTH,
> T.
>