Usable bandwidth for a decent (nondistorted) signal maybe 2-3 MHz. The connector, while better than the audio connectors used on the 1-channel ones, isn't great. You can get it to work well for a higher frequency at the expense of distortion at lower frequencies, though. There's a trimmer pot (or cap, didn't look closely). That's not the greatest solution.
The 50MHz Rigol can, I hear, be made into a 100 MHz with a firmware hack. We have two at the Asylum, and aside from the UI being a little odd, they're decent scopes. I'd still rather have a Tek or LeCroy, but I don't prefer them by as many dollars as you have to sacrifice to summon the Elder Scope Gods. No experience with the Atten. * Drew Van Zandt Artisan's Asylum Craft Lead, Electronics & Robotics Cam # US2010035593 (M:Liam Hopkins R: Bastian Rotgeld) Domain Coordinator, MA-003-D. Masquerade aVST * On Tue, May 1, 2012 at 4:39 PM, Tom Metro <[email protected]> wrote: > Drew Van Zandt wrote: > > * Not actually 4 channels. 2 O-scope channels, 2 digital inputs. > > Right, I noted that. > > > > * Distortion is terrible. 72 MS/s is an egregious enough exaggeration > > of something that is technically true that I would be tempted to punch > > their marketing guy in the snoot. > > Good to know. > > What is the source of the problem? Cheap ADC? > > A well built DSO should be able to capture consistently repetitive > signals that exceed 1/2 its sampling rate. Though in most cases the > whole reason why you are using a scope is to spot anomalies in the > signal, and for that you need your DSO's Nyquist to well exceed your > signal frequency. > > What, in your opinion, is the usable bandwidth of this scope? > > > > * Better than nothing. Marginally. > > I'm sure given time they will get better, but it sounds like they aren't > there yet. > > For now, it might be better to spend a bit more for something like: > > http://www.amazon.com/Rigol-DS1102E-Oscilloscope-Channels-Sampling/dp/B001VKCJ0M/ > > or > > > http://www.amazon.com/Atten-ADS1102CA-Oscilloscope-Channels-Sampling/dp/B0055B4JKG/ > > Both of which are sub-$500 (if you shop around) 1 GS (100 MHz BW) DSOs. > They appear relatively compact and portable, but they're not handheld. > > > > * Asylum has one, as well as a pile of the single-channel version. > > How about a Rigol or Atten? > > -Tom > > _______________________________________________ > Hardwarehacking mailing list > [email protected] > http://lists.blu.org/mailman/listinfo/hardwarehacking >
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