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| Arb generator that is worth owning? |
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| rstofer:
When looking at specs, find out how many harmonics you can add to each channel. Can the harmonics have individual phase shifts and adjustable amplitude? One of the cool things to do is generate a square(ish) waveform from odd harmonics of a sine wave at appropriate amplitudes. Each harmonic has a phase shift of zero and an amplitude of 1/harmonic number. The fundamental might as well be 1V so the 3rd harmonic is 1/3V and the 5th harmonic is 1/5V and so on. https://en.wikipedia.org/wiki/Square_wave#Fourier_analysis As you watch this Fourier series begin to approximate a square wave (probably out around the 9th harmonic) you will suddenly realize why a 100 MHz scope can only approximate a square wave of 10 MHz (9th harmonic inside bandwidth of scope) or maybe 14 MHz if the 7th harmonic is all that is required. Even then, the frequency response of the scope is falling off. A good waveform generator can provide a lot of education. That's the difference between a real waveform generator and some of the low dollar kits. At best they are a signal generator, not a waveform generator. Not that they don't work, I have one. But I'm not likely to use it again unless portability is important. Then I would probably use my AD2. |
| Old Printer:
--- Quote from: rstofer on September 15, 2019, 04:05:05 pm --- A good waveform generator can provide a lot of education. That's the difference between a real waveform generator and some of the low dollar kits. At best they are a signal generator, not a waveform generator. Not that they don't work, I have one. But I'm not likely to use it again unless portability is important. Then I would probably use my AD2. --- End quote --- Agreed, I picked up the Sainsmart when I was traveling but did not have a laptop available to run my Analog Discovery. Capability wise there is no comparison, the AD 1 or 2 can do most any thing you can think of. I always try to point out how close the AD1 and AD2 are, except for the sexy green case. At $100 or less a working AD1 is really a steal to a beginning hobbyist or student. |
| TK:
--- Quote from: tautech on September 14, 2019, 10:04:31 am ---SDG1032X easily meets all your requirements. https://www.siglenteu.com/waveform-generators/sdg1000x-series-functionarbitrary-waveform-generators/ However SDG2042X for 16 bit and touch display is right at the top of your budget. Check the datasheets as I think they both can supply 200mA. --- End quote --- the SDG1032X can be hacked to the 60MHz model |
| tautech:
--- Quote from: TK on September 15, 2019, 08:17:57 pm --- --- Quote from: tautech on September 14, 2019, 10:04:31 am ---SDG1032X easily meets all your requirements. https://www.siglenteu.com/waveform-generators/sdg1000x-series-functionarbitrary-waveform-generators/ However SDG2042X for 16 bit and touch display is right at the top of your budget. Check the datasheets as I think they both can supply 200mA. --- End quote --- the SDG1032X can be hacked to the 60MHz model --- End quote --- Yep and SDG2042X to the 120 MHz model. ;) |
| rstofer:
--- Quote from: tautech on September 15, 2019, 09:29:19 pm ---Yep and SDG2042X to the 120 MHz model. ;) --- End quote --- And the SDG2082? Not that I plan on doing it... |
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