Electronics > Beginners
Function generator - need a jungle guide:-)
<< < (3/4) > >>
bd139:
Yes I’m going to kick the 33120A while it is down now. 33120A I certainly wouldn’t recommend now explicitly. No output on/off switch, some of the parts are unobtainable, noisy fan, horrid menu system, only 15Mhz, single output. Only good but is the output is floating. They go for 2/3 of the price of a new Rigol unit here which is insane.

New keysight ones I’m no fan of. Might as well go Rigol and Siglent now. It’s all same made in China stuff. Warranty is the same. Keysight service is the same now (replace entire unit or major assemblies).
rstofer:

--- Quote from: FriedMule on October 27, 2019, 06:18:33 pm ---Thanks guys! Sorry for my apparent reluctants in this comment but a unit like Siglent with a mountain of features, nice GUI, 2ch and what not for nearly nothing... Do that unit really work? To get a GUI, one ch and less MHz in an Agilent, you have to pay maybe about 6x that price. Just asking because when tings seems to good, they normally are:-)

--- End quote ---

The Siglent SDS2082X certainly works but, at over $600, it better.  I seriously think the 2042 is completely adequate even though it is only 40 MHz. It's about $100 cheaper.

I just don't see the purpose in higher frequencies any more than I see the utility in 30V 5A PSUs.  It just doesn't come up for my projects.

Here's the project:
https://www.eevblog.com/forum/chat/a-valentine_s-day-activity-for-your-scope-and-function-generator/msg1143021/#msg1143021

If a competing waveform generator won't allow all of these harmonics/phases, it is off the list of candidates.  In my view...

With DSP, it is fairly easy, and inexpensive, to create waveform generators.  FPGAs are all over the place!  This is a lot different than 20 or 25 years ago when the systems were fairly complex because they were likely to have a lot more discrete components.
FriedMule:
so if I understand right, the 33120A is a bit like some computers were in "the good old days" fine for it's time and maybe still okay, until something goes wrong, then where you just screwed?
Yes everything is mostly made in China now, even most of the "Made in USA", they should write "made in USA, of parts from China"

About hacking, no problem in my book, I have bought the unit, it's mine and how I use / abuse my property is my decision:-)
But what model gives most after tinkering? I mean in signal quality and frequency?
The Rigol did go to 60MHz.
rstofer:

--- Quote from: FriedMule on October 27, 2019, 07:11:58 pm ---so if I understand right, the 33120A is a bit like some computers were in "the good old days" fine for it's time and maybe still okay, until something goes

--- End quote ---

In the first place, the 33120A is a single channel generator.  Most of the more modern AWGs will have two channels.  That's kind of a big deal.  I can't do the Valentine Heart with only one channel.  Among other things...

I BRIEFLY looked at the User Manual and I didn't see a way to add the 3rd, 5th, 7th, 9th and 11th harmonics to a fundamental sine wave.  Maybe I missed it.  The maximum harmonic frequency still has to fit inside the bandwidth so for a Siglent 60 MHz unit, so a 5 MHz signal is all we can use as a fundamental if we really need the 11th harmonic.  Everything has limits

The 33120A has 10 internal waveforms, the SDG2082X has 196 internal arbitrary waveforms

On its best day, the 33120A isn't any significant fraction of the Siglent with the possible exception that it has lower harmonic distortion.  Then again, it has much lower bandwidth.

I'm not going to do it but I suspect an Excel spreadsheet of specifications might be interesting.

I don't know why we're not including the Siglent SDG1000 series AWGs.  They are considerably cheaper but, of course, they won't have the features of the SDS2000 series.  The only one I can really talk about is the SDG2082X because it is on my bench.  Again, the buyer needs to compare the specs.

There is also the SDG800 series that is even cheaper.

Tautech needs to weigh in here.  This thread rightly belongs in the Test Equipment forum where the TEA people can weigh in.


tautech:
I'm here.  :)

The key here is signal purity and for general sig gen use it doesn't matter too much as 14 bit AWG's are fine for lots of requirements.
SDG1032X is your cheapest entry level 2ch AWG and the feature set is much the same as the 16 bit SDG2000X models.
Both SDG1032X and SDG2042X can be hacked to max BW's for their ranges.
SDG1000X models do square wave to their max BW's while most other brands and models limit square wave BW to some figure much lower than their sine wave spec.

I have all the Siglent AWG models and could pick any one but the SDG1032X is what lives on my bench as it perfectly meets my current needs.
If I need to venture into the RF world I drag out my SSG3021X hacked to the 3.2 GHz model.
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod