General > General Technical Chat
Review: Hantek DDS 3X25. Anyone own one?
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onlooker:
marmad,

Thanks for checking it out. Hopefully, the device can be eventually hacked to be more useful for everyone.

The other thing is : instead of, using square waves to show sweeping to check for glichs, using sine waves could also be useful to see if the waves are really transitioning at zero voltage and zero phase crossings. For square wave, small changes in modulation factor are hard to see graphically.
marmad:

--- Quote ---The other thing is : instead of, using square waves to show sweeping to check for glichs, using sine waves could also be useful to see if the waves are really transitioning at zero voltage and zero phase crossings. For square wave, small changes in modulation factor are hard to see graphically.
--- End quote ---

True... I had it set to square waves from previous post.  I'll redo the 4000/1000 sweep right now with sine wave.  Well, actually, that will be only a 4 point sine - kind of a Empire state building shape instead.  I'll leave that .png and instead add one here with slightly less periods for a reasonable sine shape.
marmad:
Here is a sweep from 10kHz to 5MHz, using total points of 4000 with 100 periods (i.e. 40 point sine wave shape).  First .png is start of sweep - output starts at 0v - sync starts at ~+3.5v. The second .png is a close-up of a transition.  You can actually count the points on the sine wave  :D
onlooker:
madmad,

Very good and promising. Hopefully this will be held true to the highest frequency setting. I guess now I can sit back and wait for your software release with all other tweakes and hacks.

Thanks


marmad:

--- Quote ---Very good and promising. Hopefully this will be held true to the highest frequency setting. I guess now I can sit back and wait for your software release with all other tweakes and hacks.
--- End quote ---

Thanks onlooker.  I'm happy to release the source when I get it cleaned-up and commented a bit.  I'm a sloppy coder - old school and bad form ;)
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