Re: Rigol Rubbish DG800 - An expensive piece of Junk
Aldo22 on 12 May, 2024 18:52 in Test Equipment
Quote from: 2N3055 on 12 May, 2024 18:04You 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? 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 "bad" is not so easy to determine here.P.S. Attached is a 50MHz Hantek square wave (AWF 2*square), clearly at the limits of the scope and the signal generator, but quite stable and no sine wave.