New Analog Discovery User .... HELP!

[Pete Basel]

Hi All,

I'm an electrical engineer who's been working in both digital, CPU design, DSP, etc, and 

analog, filters, amps, audio for over 30 years.  I wanted a portable scope and waveform 

generator for testing audio amps.  I'm not finding the waveform generator to work in any

way that I would expect.  I simply want to get a long sine burst, have that be 10% of the 

duty cycle so the other 90% is off.  I found the menu but it doesn't seem to work in any

reasonable way.  I suppose that I should post this in the correct sub-forum.

I am borrowing this from a friend who has a very high opinion of it, I'll buy one if I can get

it to work.

Hi all!

Pete Basel

[attila]

Hello,

I'm not sure if I understand correctly what you want.

With Analog Discovery 2 you can generate bursts using the Independent or Synchronized mode of the Wavegen interface.

[Pete Basel]

Thanks very much,

I posted to the main forum right after I posted here but that got lost, operator error perhaps.

Thanks for this,  so I read the manual more carefully and eventually came to something very similar

to what you are showing and I think I understand it better.  I was expecting to put the entire waveform

including the off time in memory, thinking there was plenty of memory.  Now I see that (I think) timers

are used for the off and repeat time.  I assume that is what happens, if you fill the memory with one

cycle and it is shorter than the run time it just repeats?

I think the wavegen is doing what I want, I need to try looping it back and see what I get on the scope.

I was not getting reasonable results the first time when I was not using the wavegen correctly.  Going

to try it now.

I assume math functions are used to do a raised cosine enevelope - I think I can figure that out.  In this

case I assume that I'd put say 10 cycles of 1KHz in the memory, then muliply it by a 50 Hz cosine to

get just the first half?  Then use the timers to repeat?  This type of signal makes an interesting test

for speakers.

Thanks very much,  Pete B.

[Pete Basel]

I tried looking at this with the scope and I'm thinking that perhaps the scope memory depth is not enough

to have a high sampling rate.  

I changed the parameters to wait 9.9s run for .1s in order to have 100 cycles, and I counted 25

in the burst viewed on the scope.  I can't seem to find how to change the trigger position in the

memory.  I'll read the manual.

Thanks again.