Review/comparison of Siglent SDS1000X-U and SDS2000X PLUS anywhere? - Page 1
Forum section: electronics / testgear

author: larsdenmark
author_rank: Regular Contributor
timestamp: January 06, 2021, 09:41:45 am
content: HiHas anyone made a comparison of the Siglent SDS1000X-U and SDS2000X PLUS oscilloscopes?I only do microcontroller stuff. Hence I would like to have the SDS2000X PLUS scope, but the logic analyzer is 500€ in addition to the cost for the scope and then I think I can live without it (since I already have a Saleae logic analyzer).So from a practical point of view: what things will I be missing out by getting the Siglent SDS1000X-U instead of the (much nicer looking) SDS2000X PLUS?ThanksLars

author: tautech
author_rank: Super Contributor
timestamp: January 06, 2021, 10:13:36 am
content: Hold off doing anything for a week or so if you can as I'm getting a X-U to Defpom for him to do a vid on it.Mine are on the wharf but we have massive cargo congestion so I won't have them until next week when I'll run one straight to Defpom for him to have a look at.As he has a X-E he will be pretty familiar with the UI so should do a quite reasonable review.Other than them side by side which would be quite unfair as they are very different classes of scope, study of the datasheets can indicate their capability. There's threads here for each and I know rf-loop has one so study his posts on the X-U.

author: tautech
author_rank: Super Contributor
timestamp: January 08, 2021, 01:16:10 am
content: Quote from: larsdenmark on January 06, 2021, 09:41:45 amOverview of most differences.SDS1104X-U $ 399Compact form factor1 GSa/s shared over 4 channels~120 MHz BW14 Mpts memory7" display1mV/div max sensitivity.128Kpts FFTZero options available.Great table of specs from rf-loop:https://www.eevblog.com/forum/testgear/siglent-1120-new-sds1104x-u-4-channel-100mhz-1gsas-economy-oscilloscope/msg3356644/#msg3356644SDS2104X Plus $ 1399Two 2GSa/s ADC's each with 200Mpts memory support, shared over each 2 channel pair.~185 MHz BW. BW Option upgrade path to 500 MHz.10 Bit mode to 100 MHz.10" touch and mouse capable display.500uV/div sensitivityProbe sense.2 Mpts FFTBode PlotWeb serverInbuilt 50 MHz AWG (option)More decodes. (option)Power Analysis (option)16ch MSO (option)All options except MSO are free as per current promotion.Unknowns at this time.Fan noise X-U vs 2kX Plus

author: Performa01
author_rank: Super Contributor
timestamp: January 08, 2021, 02:47:46 pm
content: Quote from: larsdenmark on January 06, 2021, 09:41:45 amIn addition to the differences listed by tautech, here are some more features the SDS2104X Plus has to offer:1 ppm time base accuracyLow noise frontend, comparable to the best in classSelectable 50 ohms input impedance (indispensable for direct coax connections and signals whose spectra significantly exceed 100MHz)Advanced two channel freeform math, including average and extended resolutionAdvanced trigger suite with holdoff by time or event for most of the triggersZone trigger as a refinement for most triggersSelectable alternative representation formats for automatic and cursor measurementsThe list might still be incomplete...Edit: time base accuracy added

author: rf-loop
author_rank: Super Contributor
timestamp: January 09, 2021, 06:45:13 am
content: Quote from: Performa01 on January 08, 2021, 02:47:46 pmTimebase accuracy depends also how we define it. Or do we define it like some peoples claim GPS OCXO accuracy over 8 hour average ...It depends do we mean 10, 100 or 1000 second average or something else.1ppm accuracy inside 100s time window is ok for oscilloscope but there is other much more critical thing. Jitter, short time jitter.Now lets take this 1ppm just for thinking. If there is 1ppm peak to peak jitter it mean that over 10ms period there can be 10ns p-p jitter and it is not good at in this class of scope. It is acceptable in 1kX-U but not in 2kXPlus..Comparing jitter. Both run parallel and get same signal what signal itself jitter is here just nonsense. (very low jitter free running high grade DOCXO - no continuous discipline for avoid discipline changes). Freq 10.000000MHz+/-0.2Hz As can see in images SDS2104XPlus jitter in this test is around 0.02ppm peak - peakSDS1104X-U jitter in this test is over 0.45ppm peak-peakOf course both test include source jitter (nonsense) and then trigger jitter, also nearly nonsense here.I have not measured at all what is time base accuracy but looks like SDS2104XPlus is less than 0.4ppm off.SDS1104X-U is more off but not measured. Trigger counter show 10.0000 continuously.SDS2014XPlus trigger counter display 9.999996 and 9.999997 last digit changing continuously between 6 and 7.In these images both scopes have 30s persistence. I have also watched over half hour both scopes parallel with this same signal and not notable slower drift.SDS2104XPlus time jitter is - very good. Very good! Around 0.02ppm peak to peak.Also SDS1104X-U time jitter is, imho, not bad in its class. under 0.5ppm peak to peak.Of course these are just only individual one scopes. Both are random individual new ones not selected.Note. Signal level is 1.6Vp-p and pure sine. 20mV/div is for get slope more steep. Due to this it also overdrive input circuits. Effect can clearly see specially in SDS X-U image where result is S shape. SDS XPlus have less this effect. Yes this is "wrong use" but only what matters here is timing, not vertical....so.Just -- pay more get more/better.

author: larsdenmark
author_rank: Regular Contributor
timestamp: January 11, 2021, 08:22:57 am
content: Thanks.Except for the Inbuilt 50 MHz AWG I don't think the technical specs are making much of a difference to what I plan to use the scope for.A decision may depend more on having a larger touch screen and a nicer user interface.

author: tautech
author_rank: Super Contributor
timestamp: January 15, 2021, 08:48:26 am
content: Quote from: tautech on January 08, 2021, 01:16:10 amAmazingly not noticeably different.This is certainly where the 80mm fan in SDS2kX Plus vs the 50mm unit in the X-U comes into play.Side by side

author: tautech
author_rank: Super Contributor
timestamp: January 19, 2021, 07:37:11 pm
content: Quote from: tautech on January 06, 2021, 10:13:36 amFinally got a X-U to Defpom yesterday as they only arrived last Friday.Hopefully he'll have a review up in a few days.

author: bodzio_stawski
author_rank: Regular Contributor
timestamp: January 20, 2021, 01:36:56 pm
content: I wonder how the buttons behave in both models. In my 1104x-e for example some buttons below the screen are noisy and I don't know why.

author: tautech
author_rank: Super Contributor
timestamp: January 20, 2021, 07:06:32 pm
content: Quote from: bodzio_stawski on January 20, 2021, 01:36:56 pmNoisy ?Do you mean they have selection bounce issues ?

author: bodzio_stawski
author_rank: Regular Contributor
timestamp: January 20, 2021, 09:38:01 pm
content: Yes, I mean, the buttons work correct (their functions are ok), but after pushing some of them make some irregular "click" sounds (similar to gamepad for example). For example, on Keysight or even Rigol, all buttons sounds identically. In Siglent, the second and the last (return button) is loud.

author: tautech
author_rank: Super Contributor
timestamp: January 20, 2021, 09:39:55 pm
content: Quote from: bodzio_stawski on January 20, 2021, 09:38:01 pmOh, OK.Big you know you can turn sound OFF ?Utility menu>Sound.

author: bodzio_stawski
author_rank: Regular Contributor
timestamp: January 20, 2021, 10:12:16 pm
content: Quote from: tautech on January 20, 2021, 09:39:55 pmNo, it is not the "beep" sound being able to turn on/off in the system. When the beep is turned off and I start clicking with no system sound, you hear a button membrane sound. This sound comes out immediately after clicking as the diaphragm returns to its original position. And this sound is extremely different for the individual buttons below the screen (talking about these 6 rectangular buttons). Everyone clicks with a different sound, it sounds weird. As if some of them were more worn, some less. And the oscilloscope is practically new.

author: tautech
author_rank: Super Contributor
timestamp: January 20, 2021, 10:30:36 pm
content: Quote from: bodzio_stawski on January 20, 2021, 10:12:16 pmOk my 2017 unit is completely silent. Maybe the new membrane just needs work as a new unit I just opened has a different feel for the membrane with a tiny crunchy feel that’s nearly silent.

author: bodzio_stawski
author_rank: Regular Contributor
timestamp: January 20, 2021, 10:43:34 pm
content: QuoteYou mean this could normalize over time? Maybe so, but I am afraid that such anomalies can be a sign of imminent damage to the oscilloscope in the near future. Maybe it is actually the result of the manufacturer's interference with the material of the membrane and that "that's how it is, and that's it". However, I am very curious how such a membrane looks from the inside of the device.

author: tautech
author_rank: Super Contributor
timestamp: January 21, 2021, 12:06:00 am
content: Quote from: bodzio_stawski on January 20, 2021, 10:43:34 pmYes, exactly.I know of no membrane failures and now you have reported your concerns here and have a 3yr warranty please just continue to use it and if there turns out to be a problem we have this record of when you bought this to our attention.

author: bodzio_stawski
author_rank: Regular Contributor
timestamp: January 25, 2021, 03:20:27 pm
content: Ok, thank you, Sir:)

author: tautech
author_rank: Super Contributor
timestamp: February 02, 2021, 07:23:38 pm
content: Defpom has a look at the new SDS1104X-U:

author: MathWizard
author_rank: Super Contributor
timestamp: September 17, 2021, 11:16:14 pm
content: Wow I have a sds1104, I didn't realize how much bigger the sds2000x screens are. I already find my 1104 pretty big coming from old 1980's scope.Yep this fall/winter I'll be saving up for a 2104X+. I might have to move a shelf a bit higher, but that would still fit nicely in my bookshelf/cabinet type thing I have AWG, DMM and PSU on.

author: tautech
author_rank: Super Contributor
timestamp: September 17, 2021, 11:28:30 pm
content: Quote from: MathWizard on September 17, 2021, 11:16:14 pmI'm guessing you mean the 7" SDS110X-E ?The earlier and now discontinued SDS1102X had a 8" display and the 2kX Pus have 10" but being a touchscreen it really needs be bigger so fingers don't touch too much at once. Personally I like a mouse with these as it provides even speedier operation and keeps the display clean of smudge marks.