Products > Test Equipment
Rigol DG800/900 Pro Pulse Capabilities
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2N3055:

--- Quote from: Njk on August 30, 2024, 05:24:11 pm ---Perhaps this is the result of different business strategies. Siglent used to work for the other brands as well so it can enjoy a better access to help, consultations and advices from them, while Rigol insists on its own brand (probably for better access to government funding) so no one can educate them on the art of decision making

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I don't know about Rigol. But Siglent seems to be more professional exactly because they insist on quality of their brand. I don't think it others "patronizing" them, but quite the opposite direction. They want to learn and make quality products.
They remind me of "old HP" a bit.
Rigol seems to be less concerned about building quality brand. They seem to think they already are and there is no need to get better. They are approaching things like they make consumer products.
That is how it seems to me.
2N3055:

--- Quote from: Njk on August 30, 2024, 05:29:36 pm ---
--- Quote from: 2N3055 on August 30, 2024, 09:10:52 am ---If by superior you mean faster, than it is faster.. SDG2000X has cca 7-8 ns rise/fall times.

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BTW the times can depend on the output amplitude. Is that number for whole amplitude range or only for small amplitude values?

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As far as I know (from datasheet) that is guaranteed at 1 Vp-p /50 Ω... that is 2 V amplitude.
I don't know until what amplitude  they hold that, I don't have 1000x/2000x here, I can only check on 6000X...
I don't think 7000A is relevant here...
NE666:

--- Quote from: tautech on August 30, 2024, 09:13:35 am ---
--- Quote from: 2N3055 on August 30, 2024, 09:10:52 am ---
--- Quote from: zrq on August 30, 2024, 09:05:01 am ---True, and it seems the only way to get a controlled rise&fall time is to program an ARB. Hope burst of pulses is something that will be added to the half baked firmware.

BTW the fall time tested is even slightly faster of <1.7 ns . This is probably superior to SDG2000X though which specified to be <8ns iirc (only using one at work, no chance to test it).

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If by superior you mean faster, than it is faster.. SDG2000X has cca 7-8 ns rise/fall times.

But if you don't need edges faster than 8 ns but good control than SDG2000S is vastly superiors to Rigol. Eye of the beholder and actual needs in practice rule...

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SDS1000X ~1/2 that.

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That's not what the datasheet says. "<12ns (10% ~ 90%)"  for square waves and "7ns Rise/Fall time (10% ~ 90%,typical,1 kHz,1Vpp)" for pulse.

I stand corrected by myself, I'd been reading the SDG1000 (vs SDG1000X) specs. The SDS1000X isn't half, it's actually double (according to the specs): "Min. 16.8ns Rise/Fall" for pulse.  Which is one of the reasons that I'd hoped the 800 Pro would work out.
Njk:
Anyway for my Rigol DG800 the min. pulse rise/fall time setting is 8 ns for the amplitudes of up to 6V PP (into 50 ohm) and 20 ns for greater amplitudes. I think something similar can be the case with the other gens like this because the output amplifier capability depends on the amplitude.
2N3055:

--- Quote from: Njk on August 30, 2024, 06:56:46 pm ---Anyway for my Rigol DG800 the min. pulse rise/fall time setting is 8 ns for the amplitudes of up to 6V PP (into 50 ohm) and 20 ns for greater amplitudes. I think something similar can be the case with the other gens like this because the output amplifier capability depends on the amplitude.

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You are absolutely right. Output amplifiers will have slew rate limit..
These are NOT dedicated pulse generators, they are general purpose AWG that actually treat pulse same as any other signal, going through output amplifier. What you get is great versatility, not absolutely uncompromised cutting edge pulse performance.

But, for many uses they are good enough, or even great if slew rates and amplitudes numbers good enough for you, and they give you great options.
One thing I use a lot is WaveCombine, where you can mix bot channels right there on the AWG, easily creating aggressor signals, or some complex combinations.
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