Electronics > Beginners
Is the Rigol DS1054Z still the best entry level digital scope for the price?
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rstofer:

--- Quote from: james_s on May 01, 2017, 05:14:02 pm ---Bandwidth largely determines the max rise time you can accurately display. 100MHz is probably enough for most stuff but it never hurts to have more bandwidth. I got by with a 100MHz analog scope for many years, but now that I have a newer high bandwidth scope I wonder how I got by without it. Still, for entry level 100MHz is probably enough. You can still look at somewhat faster signals than that, you just have to understand how the limited bandwidth affects what you see.

--- End quote ---

In the video, the author runs the 200 MHz scope up to 400 MHz.  The display is messed up with aliasing but you can still see the waveform.  300 MHz actually looked pretty good.  Attenuated, sure, but the waveform was there.  Then again, it was a sine wave.  I would have rather seen a square wave.

I need to understand a lot more about the decoding to get interested in yet another scope.  Does it just decode the screen image?  Does it decode the entire buffer?

I like the idea of being able to turn off all of the measurements with a single button.

I still have no idea what segmented memory is all about and why I would care.  The author seems to understand it and praises the scope so it must be important.
tautech:

--- Quote from: Karel on May 01, 2017, 03:23:02 pm ---Don't buy anything from Siglent if you are not sure you don't want to sell it on Ebay later...

https://www.eevblog.com/forum/testgear/siglent-they-filed-a-'wrongful-trademark-claim'/

--- End quote ---
Really ?

You must be aware Rigol tried this on too, or have you conveniently forgotten ?
https://www.eevblog.com/forum/beginners/ds1052e-removed-from-ebay/

rstofer:

--- Quote from: tautech on May 01, 2017, 08:17:59 pm ---
--- Quote from: Karel on May 01, 2017, 03:23:02 pm ---Don't buy anything from Siglent if you are not sure you don't want to sell it on Ebay later...

https://www.eevblog.com/forum/testgear/siglent-they-filed-a-'wrongful-trademark-claim'/

--- End quote ---
Really ?

You must be aware Rigol tried this on too, or have you conveniently forgotten ?
https://www.eevblog.com/forum/beginners/ds1052e-removed-from-ebay/

--- End quote ---

Both brands are all over eBay today.  Including this new scope but is shown as overpriced out of Hong Kong.  At least one of the Siglents is 'used'.

james_s:
Why the issues with ebay? Are there fake Siglent and Rigol scopes out there? I would not buy one out of China on ebay but a used one from the US would not raise any red flags.
rstofer:

--- Quote from: james_s on May 01, 2017, 08:36:03 pm ---Why the issues with ebay? Are there fake Siglent and Rigol scopes out there? I would not buy one out of China on ebay but a used one from the US would not raise any red flags.

--- End quote ---

The manufacturers didn't want a 'gray market' in their products.  This is actually pretty common and a huge problem in the SCUBA industry where regulators are available in foreign countries (relative to US) for considerably less money.  The customers in the US are getting ripped and will often order from foreign sources but the manufacturer claims you won't get a warranty and your local retailer may no perform the usual maintenance.  Sometimes retailers order from these sources in bulk and sell the products for less than MSRP.  Not the kind of thing the manufacturer wants to see as they try to protect their authorized resellers.

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