Products > Test Equipment

SainSmart DDS120 & DDS140 USB Oscilloscope

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merbanan:
I've started adding more sample rates and some sample rates are possible to both have with a 48MHz clock or 30MHz clock. Am I correct in believing that a slower ADC clock might give slightly more stable samples?

doctormord:
I would say it just gives less "noise" due to less samples. (But it's not getting better, just looks like that)

Oversampling, averaging and/or decimation is another/better approach.

mmark:

--- Quote from: merbanan on April 05, 2016, 08:44:49 am ---
Can you send your changes as a github pull request so you get the proper attribution for this fix ?

--- End quote ---

Done! I also changed the VID:PID of the Sainsmart DDS-120 FW from the Hantek VID:PID (0x04b5:0x6022) to something unique (0x8102:0xd120).

BTW: pulseview crashes on both Linux (without my changes) and Mac OSX (with my changes) when I try to record 10M samples or more. 5M works fine...

MysticPixel:
So I read through the thread but there's been a lot of programs going back and forth, I'm not sure what I should be looking for software-wise if I'm considering picking one of these up.

Basically I just want something to check timings on uC projects. I have a Usbee (AX? older... it's like the DX but only 8 channels) but it just doesn't play nice with some ICD devices etc. Looking for something cheap but most importantly the software has to not be total rubbish. Honestly, vertical accuracy isn't too important for this app, I just need something that can reasonable capture signals, and my trusty Tek 2445 is starting to fritz... (also need something digital)

I'd be willing to spend the ~$90 US or so for a dds-140 but I'm kind of at a loss for what software is the best / most developed.

Anyone care to sum it up for newcomers to the thread? C'mon, pimp your badass programs and tell me which one I should be using! :-P

ninja edit: it looks like SanSmart has a Logic Analyzer add-on that's only another few $. Anyone tried it?

lavajumper:
I'm with MysticPixel on this count. I got a DDS140, siggen and logic unit as a christmas present. The software crashes more than a drunken stock car, and I'm getting different readings off the signal generator between versions  v1.4 vs. v6 . (Seriously, 5 major version bumps in 4 months???)

I'm impressed with the work I've been reading about here, but having a hard time figuring out what needs done, what's been done, what the current files are.
I'm more than willing to help with the porting/dev of the QT part.

Is there a github?
What do we need to do to get this hardware running?

I'm not bitching, I'm trying to roll up my sleeves.

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