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| Arb generator that is worth owning? |
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| rstofer:
I bought the SDG2082 because I could and there was a thread about generating a Valentine's Heart by combining a bunch of harmonics with phase shift. It's around here somewhere. It is typical that waveforms other than sine have a maximum frequency well below that stated for the sine. The Siglent SDG2000x series is limited to around 25 MHz (if I'm reading the specs correctly). It states 9 ns rise and fall times (10%-90%) so if we considered just the edges we would see about 50 MHz. But there really ought to be a flat spot on top of a square wave and that's probably why it is limited to 25 MHz. http://www.spinelectronics.eu/ftp/datasheets/SDG2000X_datasheet.pdf https://mediacdn.eu/mage/media/downloads/SDG2000X_UserManual.pdf So, you probably aren't going to get the full frequency on other than sine waves. As I said, I bought it because I could and I wanted to play with the "Heart". I can generate very nice waveforms with my Analog Discovery 2 for a lot less money. A lot of people slide right on past the AD2 thinking of it as a toy. That's a mistake! They could do a LOT of electronics for $279 in equipment costs. Yup! It's on the lower end of frequency but more than adequate for just about anything a hobbyist could get into. https://store.digilentinc.com/analog-discovery-2-100msps-usb-oscilloscope-logic-analyzer-and-variable-power-supply And it has a 2 channel arbitrary waveform generator... Don't overlook the advantage of a 27" screen! |
| Old Printer:
And the AD1 is 98% as good as the AD2, and Digilent sold a ton of them to EE students for $99. They are out there sitting in drawers waiting to be found. At $279 for an AD2 against the price of a 1054z in the mid $300s it's a tough sell, but for under a hundreds bucks, a no brainier. |
| FriedMule:
I thank you all a lot and will look at every product you write about. :-) |
| Mattjd:
--- Quote from: bd139 on September 14, 2019, 12:18:30 pm ---I like the Rigol DG1022Z. Cheap, two channels, excellent performance (better than most of the rivals) and you can crack it to 60MHz. --- End quote --- I haven't seen this one, I have the dg1022z. |
| rstofer:
--- Quote from: Old Printer on September 15, 2019, 04:06:31 am ---And the AD1 is 98% as good as the AD2, and Digilent sold a ton of them to EE students for $99. They are out there sitting in drawers waiting to be found. At $279 for an AD2 against the price of a 1054z in the mid $300s it's a tough sell, but for under a hundreds bucks, a no brainier. --- End quote --- eBay has a couple of AD 1s for sale at reasonable prices but mostly they are trying to sell the AD2s for half again more than they cost. But it isn't just a 2 channel scope, it includes two arbitrary waveform generators, two power supplies (limited), digital IO/pattern generator and so on. Priced against just a scope, the scope wins. Priced against a bench full of instruments, I'm not so sure. And the scope channels have differential input (until you use the BNC adapter) which can be fairly handy when you want to specifically measure the voltage drop across a component that is not tied to ground. It's probably true that the market for this gadget is students, not hobbyists. Add a breadboard and a handful of components then toss in a laptop and you have a lab in a backpack. |
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