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

[Stewart Pye]

I sent this about 10 hours ago but it didn't seem to get through, so 
here it is...

Hi Dan,

I think everyone assumed when you mentioned VCO that a sawtooth wave 
from the VCO was driving the input of the quantizer.

So, put a sawtooth signal from the VCO into channel 1 of the CRO and to 
the input of the quantizer. Put the output of the quantizer into channel 
2. Trigger from channel 1.

I guess you could check it using x-y mode too. I assume that would look 
like a square wave but you could see any difference in the steps. Am I 
visualising this correctly?

On a side note - Is the Australian-English spelling "quantiser". I 
instinctively wanted to type it that way. We dont use Z's so much down here!

Regards,
Stewart.


Dan Snazelle wrote:
> ok
>
> i am a bit lost as i have never done any external triggering
>
> here is what i think i should do
>
> 1, i connect the output of the quantizer to my vco input
>
> 2. i connect the square output of the vco into the channel 2 of my scope
>
> 3. i set trig mode to channel 2
>
> 4. i plug channel A of the scope INTO the output of the LFO i am driving the quantizer with (a saw wave)
>
> correct?????
>
>
>
>
>
>
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> ----------------------------------------
>   
>> 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 17:27:19 +0100
>> To: subjectivity at hotmail.com
>>
>> no, don't use X/Y mode. At least, I wouldn't.
>>
>> I'd stick the staircase into one input and the VCO into the other,
>> set to some easy-to-trigger-from waveform like a ramp or square, and
>> then set the trig to the VCO channel. Then just set the timebase long
>> enough that you can see a couple of wavecycles and you can compare
>> the VCO output with the quantizer output.
>>
>> T.
>>
>>
>> On 17 May 2009, at 16:12, Dan Snazelle wrote:
>>
>>     
>>> quick question
>>>
>>> how does one go about viewing/testing a stairstep on a scope?
>>>
>>> do i put it into x/y mode and put one probe to the output and one
>>> to the vco?
>>>
>>> i was told this is how to test the quantizer
>>>
>>>
>>> thanks so much!!
>>>
>>>
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>>> Synth-diy mailing list
>>> Synth-diy at dropmix.xs4all.nl
>>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
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>>>       
>>     
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