"The layout is eerily similar. Like the Keysight, all of the Chinese unit’s knobs can be pressed in to change some functionality. For instance, on both units pushing a vertical gain knob toggles the gain from the normal 1-2-5 sequence to a “variable” mode, where the gain is continuously adjustable. I don’t find it useful but perhaps it makes sense if one were using the unit for automated testing.
The Keysight’s knobs feel better, and the Siglent’s buttons have a little bit of a mushy feel rather than a sharp snap.
Other features are different – for instance the Keysight has twice the lower unit’s sample rate. It takes a wider range of probes.
But it is five times the price.
The Siglent’s user interface is almost identical to Keysight’s and is just as intuitive. It’s a very easy scope to operate. There are a lot of modes, though, and I found myself referring to the 200 page pretty decent manual (supplied as a PDF without clickable links in the table of contents) for the more obscure functions. The 800 x 480 eight-inch screen is very crisp and, unlike on their $359 model, I didn’t find myself wishing for more resolution. Sometimes a lot of information is displayed and the characters can be quite small. The layout is an odd 8 by 14 divisions which is not a problem; just don’t assume the usual 10 on the horizontal axis when measuring time.
One of the great things about digital scopes is the deep memory. With 140 Mpts there’s a lot of data captured. You can take a single slow sweep and then crank up the time base to see lots of detail about the signal.
Read more here: http://www.embedded.com/electronics-blogs/break-points/4442429/Siglent-s-SDS-2000X-oscilloscopes
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