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| Rigol Rubbish DG800 - An expensive piece of Junk |
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| Aldo22:
--- Quote from: 2N3055 on May 12, 2024, 06:04:40 pm ---You always have to read specifications carefully and decide if they are useful to you. For high end expensive equipment even more so because stakes are higher. There are many details to pay attention to. For instance that Hantek 1MHz ramp, does it specify linearity error? Triangle wave is hard to do linear at high frequencies. At highest square wave frequency, what are rise/fall times of edges? Are they so slow that it is trapezoidal wave instead? Are rise/fall times guaranteed at highest output amplitude? --- End quote --- Don't get me wrong, I'm not trying to talk up my cheap Hantek. It's just an example that I know. I just find it very difficult to orientate myself with the specifications of a signal generator because they vary so much. It would be easy if the specifications went in the same direction. e.g. 16bit vert. res., 300Msa/s, square rise time 3ns etc. But it's not like that. It's 12bit, 250MSa/s, 3ns RT OR 16bit, 125MSa/s, 16ns RT etc. A beginner doesn't know which spec is more important. I think this is also eTobey's problem. He thought he had a "good" signal generator. But apparently he is not happy with some of the specs. Apparently "good" and "better" is not so easy to determine here. P.S. Attached is a 50MHz Hantek square wave (AWF 2*square, 50Ohm load 2V->1V), clearly at the limits of the scope and the signal generator, but quite stable and no sine wave. And a 1MHz ramp @7Vpp. |
| Martin72:
--- Quote ---Rigol Rubbish DG800 - An expensive piece of Junk --- End quote --- It is about time that this title was changed, even if it would ultimately serve the purpose of self-protection. |
| KungFuJosh:
--- Quote from: Martin72 on May 12, 2024, 11:17:45 pm --- --- Quote ---Rigol Rubbish DG800 - An expensive piece of Junk --- End quote --- It is about time that this title was changed, even if it would ultimately serve the purpose of self-protection. --- End quote --- Yeah, it's redundant anyway. 😉😉 |
| jonpaul:
Just usual junk from China, suggest for the $300, get a used 1980s or 1990s HP FG AWG j |
| ebastler:
--- Quote from: jonpaul on May 13, 2024, 05:08:09 am ---get a used 1980s or 1990s HP FG AWG --- End quote --- What would be your recommendation for a dual-channel HP AWG in that price range? The HP 33120A looks plausible but is single-channel only. Did they make a comparable model with two channels? |
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