Suggestion on getting a new Oscilloscope  - Page 1
Forum section: electronics / testgear

author: ashkan
author_rank: Newbie
timestamp: June 25, 2020, 02:23:46 am
content: Hi Guys, hope everyone is fine and healthy.I am looking to get a new oscilloscope and I am a beginner.Regardless to general use, i need something which helps me identifying noises in circuits. Also, shows the frequency and db (FFT , Math?).I came across Keysight brand and this modelhttps://au.mouser.com/ProductDetail/Keysight/DSOX1202G-DSOX1202A-100?qs=Fd5IDHV0WqxpqhPP4swfog%3D%3Dwould it be a good choice? would really appreciate any feedback and suggestion.CheersAshkan

author: tautech
author_rank: Super Contributor
timestamp: June 25, 2020, 07:26:11 am
content: I'm sure you can get something cheaper that will easily meet you needs or even be better.FYI TrioTest are the AU Keysight agents and could likely beat Mouser for price.https://www.triotest.com.au/electronic-and-rf/oscilloscopeWhile you're over at Trio's website check out something from the Siglent range.SDS1202X-E or SDS2202X-E are similarly spec'ed models and with a few features that are additional cost when compared to Keysight.

author: stafil
author_rank: Regular Contributor
timestamp: June 25, 2020, 05:22:45 pm
content: Quote from: ashkan on June 25, 2020, 02:23:46 amIt's a good scope, but way overpriced in comparison to Rigol, Siglent and GW Instek without giving you anything more other than the Keysight badge.

author: Fungus
author_rank: Super Contributor
timestamp: June 25, 2020, 06:14:32 pm
content: If I had that much money to spend I'd look at the Rigol MSO5000. It has built in signal generators and can easily be unlocked to get 350Mhz bandwidth and a load more stuff.

author: stafil
author_rank: Regular Contributor
timestamp: June 25, 2020, 06:18:52 pm
content: Quote from: Fungus on June 25, 2020, 06:14:32 pmThe signal generator on MSO5000 is pretty limited in regards to amplitude."Impedance is set to "HighZ", the available range is from 20mVppto 5 Vpp; when Impedance is set to "50Ω", the available range is from 10mVppto 2.5 Vpp"

author: Gandalf_Sr
author_rank: Super Contributor
timestamp: June 26, 2020, 11:08:33 am
content: Quote from: stafil on June 25, 2020, 06:18:52 pmThe signal generators that are built in to modern scopes tend to be limited. The 50Ω setting is only 2.5 Vpp when its connected to a 50Ω load, it you measured it open circuit, you'd see 5 Vpp.The MSO5000 is a great scope, I own one. In fact, having just sold my Keysight MSOX4054A, the MSO5074 is my 'best' scope and I really don't miss the Keysight.

author: EEVblog
author_rank: Unknown
timestamp: June 26, 2020, 11:12:04 am
content: If you are considering an $1800 scope, then you have many great options.As others have said, there are better "bang-per-buck" options than the Keysight. That being said, the Keysightisan excellent scope, and is my preferred daily driver.

author: tv84
author_rank: Super Contributor
timestamp: June 26, 2020, 11:32:46 am
content: Quote from: ashkan on June 25, 2020, 02:23:46 amIf you are a beginner and have decided to spend between €1000-1500, my advice is (as always) Rigol MSO5074 (1000€) or Siglent SDS2104X+ (1500€). Don't try to compare them.Think of it as doing bid sniping on an auction: decide your max bid and bid at the last moment and don't look back.Decide if you are better spending 1500, just 1000 or 500. For the 1st two cases, the options are the ones I've told you. The 500€ range is a whole new ballgame (several contenders).

author: Sighound36
author_rank: Frequent Contributor
timestamp: June 26, 2020, 12:03:19 pm
content: Having owned or still owning a great many of the scopes mentioned.Simple break down, the Rigol 5000 series best horsepower (8G/s) 200Mpts and a decent amount of features plus it has a bode plot nowBuilt in FG, Mey not really ok at a pinch but not for serious work imho. However a DG812/2 can be Tv84'd was ease its 16 bits and is far more accurate than any of the inbuilt FG's,The Siglent is more polished and slicker and the help and a lot of arm twisting for everyone's favorite Kiwi Siglent vendor keep on top of firmware bugs and features.The Keysight will be good, in a direct comparison I can not answer that one you would need to ask an owner for that one!Both the Siglent and Rigol can be opened up very easily, plenty of supporters on here for both brands. I have both scopes, my son uses the 5000 and Siglent equivalent unit. Both represent stonking value when upgraded.I prefer the Rigol's but that's personal, for my field they are better suited, however the Siglent is good the person to really ask would be Martin 72 he is a Rigol defector to Siglentbut has great experience with both scopes and is a well balanced and genuine individual his options carry weight imho.

author: stafil
author_rank: Regular Contributor
timestamp: June 26, 2020, 05:59:25 pm
content: Quote from: Gandalf_Sr on June 26, 2020, 11:08:33 am> The MSO5000 is a great scopeMy comment was limited to the signal generator. 100% agree, it's a great, feature packed, hackable and at an amazing price point. The DSOX1200 is not even in the same league. Didn't mean to take that away from it.

author: martinot
author_rank: Regular Contributor
timestamp: July 03, 2020, 10:49:38 pm
content: Quote from: ashkan on June 25, 2020, 02:23:46 amI personally think it looks like a potentially very good combination between high quality software and polished user interface (hardware is usually quite equal between different brands), and still a a very low affordable budget price.*I will check it out and test it myself (will come back with impressions).* even if you can always go even cheaper if you do not care about anything else than features/price, and if quality is not high on the list.

author: ashkan
author_rank: Newbie
timestamp: July 05, 2020, 10:59:17 pm
content: Dear All , Thanks a lot for your comments and suggestions.I end up getting "DSOX1204G" 100Mhz version.I think it will be ok for at least 5 years!.I will try to share my experience with it.CheersAshkan

author: Gandalf_Sr
author_rank: Super Contributor
timestamp: July 06, 2020, 11:10:36 am
content: For less money you could have got the Rigol MSO5074. The Keysight is an OK scope but very expensive in terms of what it does. I guess you could return the Keysight and still get the Rigol?I just sold a used Keysight MSOX4054A on eBay with the all features bundle for around $7,000 US, the Rigol MSO5074 is a worthy replacement and cost me $1,000. I'm retiring and couldn't justify having that much money tied up in a scope.

author: 2N3055
author_rank: Super Contributor
timestamp: July 06, 2020, 11:54:32 am
content: Quote from: Gandalf_Sr on July 06, 2020, 11:10:36 amI learned my lesson. More often than not, whenever someone opens the topic with preference to some A-brand piece of equipment, whatever you say, they will buy exactly that one, no matter if that is really the best option. Every person has their priorities, and it doesn't have to be based on technical merits.

author: Gandalf_Sr
author_rank: Super Contributor
timestamp: July 06, 2020, 12:28:54 pm
content: Quote from: 2N3055 on July 06, 2020, 11:54:32 amYeah, I read through the whole thread and saw that the advice was all along the same lines... the Keysight is a good quality scope but it's left in the dust as far as bang for the buck is concerned by the likes of the MSO5074, especially after the upgrade.

author: Ctrlocti
author_rank: Regular Contributor
timestamp: July 06, 2020, 01:40:28 pm
content: Quote from: tv84 on June 26, 2020, 11:32:46 amOh I'm knee deep in comparing those two and I'm tired of it.I guess I'm going to hijack this thread rather than make a new one since it seems that the OP got the keysight.I want to upgrade from my 1054z but I'm really stuck between the rigol and the siglent. I'm looking for quality of life upgrades, as in bigger/nicer screen, easier UI (knob per function ideally but I know I am not getting that in either scopes) etc. I've been reading everything I can find on user experience and basic specs, and so far I have this:The Rigol's screen is a bit dim and off-axis performance is so-so? Not sure if this is fixed with latest firmware? (the brightness I mean)the Rigol is a bit sluggish on the UI ? But it's not clear if that's for the touch screen or the knobs/buttons? Speaking of touchscreen, do Ihaveto use it for some things or can I get around with the knobs and buttons for everything?Whiny fan on the rigol?The Siglent has a bigger (better?) screen than the Rigol. Matte screen vs glossy on the rigol ?Siglent has one rotary encoder that's shared across the channels vs per channel on the rigol.Siglent seems a bit more menu-diving than the Rigol or am I wrong?8g/s for the rigol vs 2g/s of the siglent (don't remember how low those figures drop for multichannel but the rigol wins IIRC)no hi-rez on the rigol ? how's the siglent doing it in this aspect?50ohm input on the siglentRigol looks pretty in black. Siglent is the same boring off-white beige...I know people like them but I think it's nice to have some color. I'd buy the hello kitty version, if you know what I mean.Anyway, just looking for a good scope - I'm happy with my 1054z but I got cash to burn and want to upgrade. I work in the audio range mostly, analog circuits. oscillators, envellopes, filters, stuff like that.I know Tautech will champion the Siglent, is there anybody to champion the Rigol? I'm leaning towards Siglent to be honest, just the lower sample rate and shared channel controls put me down a little bit.

author: tautech
author_rank: Super Contributor
timestamp: July 06, 2020, 01:50:15 pm
content: Quote from: Ctrlocti on July 06, 2020, 01:40:28 pmWelcome to the forum.Yeah well it's not like you haven't used multiplexed controls with your 54Z so a switch shouldn't give you any issues.QuoteSDS2kX Plus models have 10 bit and ERES modes.Check out the first few pages in the SDS2kX Plus thread for Performa01's posts.

author: tv84
author_rank: Super Contributor
timestamp: July 06, 2020, 01:50:35 pm
content: Quote from: Ctrlocti on July 06, 2020, 01:40:28 pmThe Rigol is 1000. The Siglent is 1500. Do you have anything else to do with those 500 bucks? If yes, buy the Rigol. If not buy the Siglent. (I'll create myself a tagline with this...)

author: tv84
author_rank: Super Contributor
timestamp: July 06, 2020, 01:53:10 pm
content: Quote from: ashkan on July 05, 2020, 10:59:17 pmAs a sign of respect for the forum you should write here the reasons that made you choose the KS after all that was said.Then, after you receive it and have experienced it, come here and comment on your expectations fulfillment.

author: tautech
author_rank: Super Contributor
timestamp: July 06, 2020, 01:55:25 pm
content: Quote from: tv84 on July 06, 2020, 01:50:35 pmCorrections made.

author: Gandalf_Sr
author_rank: Super Contributor
timestamp: July 06, 2020, 02:00:05 pm
content: The display brightness and viewability on the new MSO5000s is fine.

author: Ctrlocti
author_rank: Regular Contributor
timestamp: July 06, 2020, 02:02:20 pm
content: Quote from: tautech on July 06, 2020, 01:50:15 pmRe the multiplexed controls, that's exactly the thing. I have used them in the 1054z and would like to upgrade. It's not a deal breaker but eh. I guess it's bigger screen vs more knobs thing. But I want bothED: And thanks for the welcomeI'll check the SDS2kX Plus thread for the posts you mentioned

author: Ctrlocti
author_rank: Regular Contributor
timestamp: July 06, 2020, 02:05:45 pm
content: Quote from: tv84 on July 06, 2020, 01:50:35 pmBut I'm not seeing how the Siglent is 500$ better than the Rigol. It does some things better than the Rigol and some things less so. I mean, if we just added all the advantages of the Siglent to the Rigol for an extra 500 then yeah it would be an easy more $ = more features but it's not the case. at least to my eyes anyway, happy to be corrected if I am being dense. That would make my life easier

author: Ctrlocti
author_rank: Regular Contributor
timestamp: July 06, 2020, 02:07:37 pm
content: Quote from: Gandalf_Sr on July 06, 2020, 02:00:05 pmGood to know, thanks. Is it a matt or glossy screen?IS the UI slow only when using the touch screen or also when using the physical interface (knobs/buttons)?

author: tv84
author_rank: Super Contributor
timestamp: July 06, 2020, 02:09:55 pm
content: Quote from: tautech on July 06, 2020, 01:55:25 pmDamn! I'll have to incorporate a ticker tape in my tagline!

author: tv84
author_rank: Super Contributor
timestamp: July 06, 2020, 02:14:26 pm
content: Quote from: Ctrlocti on July 06, 2020, 02:05:45 pmI didn't say it was $500 better. I said it is $500 more expensive.You are precisely at the point that you should be. When you solve the above doubts (and believe me, ONLY YOU, can solve them), you'll have your decision.You're on the right track!

author: Ctrlocti
author_rank: Regular Contributor
timestamp: July 06, 2020, 02:53:15 pm
content: Quote from: tv84 on July 06, 2020, 02:14:26 pmThat's a hard but fair answer man. I like it. I'll study some more and post back.

author: nctnico
author_rank: Super Contributor
timestamp: July 06, 2020, 03:10:18 pm
content: Quote from: Ctrlocti on July 06, 2020, 02:07:37 pmDo not worry about matt or glossy screen. It doesn't matter.

author: 2N3055
author_rank: Super Contributor
timestamp: July 06, 2020, 03:24:29 pm
content: Quote from: Ctrlocti on July 06, 2020, 02:05:45 pmHello and welcome!These two scope are sufficiently different that it might be important to you.Rigol will have faster Wfms/second, so screen will look a bit more like analog scope. Rigol does analog like display very good.Also Rigol will have a bit limited sensitivity at lower range it goes to 4 mV/div (less than that is digital zoom), while Siglent will go all they down to real 500uV/div and together with 10 Bit mode it is better suited for low level analog work..Siglent has more modern touch screen GUI, with a little better usage of screen for decoding...Also measurements have more logical layout on Siglent, together with histicons and other nice stuff.On the other hand Rigol has 4 decodes and 4 math channels while Siglent has 2 decodes and 2 math channels.So both of them have pros and cons....Regards,Sinisa

author: Elasia
author_rank: Frequent Contributor
timestamp: July 06, 2020, 03:56:51 pm
content: CAN FD was the deal maker for me.. thats a vital protocol im moving into which needs study, otherwise i might have gone with the rigolThey are both good scopes so really does come down to the fine details like others are getting at... just read over the spec sheets and go with what you like better or is more useful

author: tv84
author_rank: Super Contributor
timestamp: July 06, 2020, 04:24:48 pm
content: Quote from: Elasia on July 06, 2020, 03:56:51 pmRigol hasn't got CAN FD?

author: bdunham7
author_rank: Super Contributor
timestamp: July 06, 2020, 05:16:06 pm
content: Quote from: ashkan on July 05, 2020, 10:59:17 pmGood choice, actually. I was going to suggest an EDUX version if you are just starting out, but if the price isn't too much for you, this should serve you very well for a very long time. Let us know if you find any bugs.

author: tautech
author_rank: Super Contributor
timestamp: July 06, 2020, 09:14:25 pm
content: Quote from: Ctrlocti on July 06, 2020, 02:05:45 pmThere's a few subtle differences easily overlooked that you might miss if you need/want them:Probe sense.2x 200Mpts mem depth. (200Mpts for each ADC)50 MHz AWG.10" display.2 Mpts FFT500 MHz analog front end and option.50 ohm inputs.Mouse control capable.

author: Fungus
author_rank: Super Contributor
timestamp: July 06, 2020, 09:20:30 pm
content: Quote from: Ctrlocti on July 06, 2020, 01:40:28 pmLots of people around here own the Rigol, not many people own the Siglent. Think about that.Quote from: Ctrlocti on July 06, 2020, 01:40:28 pmYou should definitely consider getting a Micsig instead:http://www.micsig.com/html/86.html

author: nctnico
author_rank: Super Contributor
timestamp: July 06, 2020, 09:36:19 pm
content: Quote from: Fungus on July 06, 2020, 09:20:30 pmWell... I'd like to see some hard numbers to back that statement. Several people have returned their Rigol MSO5000 due to bugs and missing of features. Siglent does seem to have a better handle on things and for audio the higher sensitivity is good to have.

author: Fungus
author_rank: Super Contributor
timestamp: July 06, 2020, 09:42:41 pm
content: Quote from: nctnico on July 06, 2020, 09:36:19 pmNo surprises there.You could start a poll...Quote from: nctnico on July 06, 2020, 09:36:19 pmBugs get fixed later on, but... what did they buy instead?

author: Elasia
author_rank: Frequent Contributor
timestamp: July 06, 2020, 11:22:07 pm
content: Quote from: tv84 on July 06, 2020, 04:24:48 pmnah... it probly would have though if released a tad later.. just has CAN listed; that said.. fantastic scope the siglent has turned out to be.. no regrets

author: ashkan
author_rank: Newbie
timestamp: July 07, 2020, 01:45:37 am
content: Thanks for your time and suggestions,It seems that Keysight has less issue than others and better customer service. so I did not mind paying some extra. and this model covers my expectation at this stage.I will definitely share my experience with others.Cheers

author: Ctrlocti
author_rank: Regular Contributor
timestamp: July 07, 2020, 02:53:04 pm
content: Quote from: 2N3055 on July 06, 2020, 03:24:29 pmThanks!re wfms/s: the siglent says 120k for "normal" mode and 500k for "sequence". I assume normal is single shot and sequence is ETS/reconstruction. The rigol just says 500k max. What's the single shot capture rate? I can't find it anywhere in the spec sheet.re uv/dv . You are so right! I found this footnote, I would not have caught it otherwise (it's like 20pages after the reference is made)Note: 1 mV/div and 2 mV/div are a magnification of 4 mV/div setting. For vertical accuracy calculations, use full scale of 32 mV for 1 mV/div and 2 mV/div sensitivity settingabout the sample rate :siglent: 2gsa/s (single / half channel) and 1gsa/s (4 channel)rigol: 8 GSa/s (single-channel), 4 GSa/s (half-channel), 2 GSa/s (all channels)this I don't know how to deal with. Obviously more is better but at what point does it stop mattering to me? let's say I don't have any sinusoid signals over 100mhz or squares over 10-20mhz. 1 gsa/s is 10x the signal frequency, right (1ghz/100mhz? can we convert gsa/s to ghz for this comparison?) ? so nyquist-shannon theorem is satisfied and most literature i have read says 3-4 sample rate over the signal frequency. How much more detail do I see with 40x and 80x sample rate:signal frequency ? does it matter in real life applications? anybody have pics?ED: should I move the conversation to the main thread on the siglent?

author: 2N3055
author_rank: Super Contributor
timestamp: July 07, 2020, 03:18:00 pm
content: Quote from: Ctrlocti on July 07, 2020, 02:53:04 pmwfms/s of 120kwfms/s and 500kwfms/s respectively for Rigol are both for real time acquisitions (that is basically trigger event + grabbing of memory buffer as set) and it is MAX for both in ideal circumstances and on very short timebases. Both are good and more than fast enough in practice. These scope don't support classic ETS, only realtime. Using dot mode and short persistence will create effect similar to RIS sampling.I'm glad you found it it datasheet. It is not obvious so I like to point it out.Faster sample rate is better in theory. In practice both are good enough.

author: Ctrlocti
author_rank: Regular Contributor
timestamp: July 08, 2020, 01:24:49 pm
content: Quote from: 2N3055 on July 07, 2020, 03:18:00 pmThanks, I've been reading the siglent manual and it's clear. Haven't read the rigoil one yet so I'm not clear on how they apply their 500kwfrms/s yet. I'll get to it.Anyway, it's a pretty tough comparison between the two. The siglent is 40% more expensive so I'm trying to see what I'm getting:+a bigger screen,+more sensitivity,+ hi res 10bit mode (im going to go ask on the rigol thread what the status is on this)-less samples (1/2 to 1/4)?maybe better software.i guess I'm getting the siglent

author: Sighound36
author_rank: Frequent Contributor
timestamp: July 08, 2020, 01:37:12 pm
content: Just follow what you want to do.Personally I would loan both units and make your own mind up in your test lab.

author: tv84
author_rank: Super Contributor
timestamp: July 08, 2020, 01:57:11 pm
content: Quote from: Ctrlocti on July 08, 2020, 01:24:49 pmYou are basically only listing Siglent pros. And it seems you have the additional $500... So your mind/pocket is set.What are you waiting for?

author: Ctrlocti
author_rank: Regular Contributor
timestamp: July 08, 2020, 02:14:20 pm
content: well I did put "-less samples (1/2 to 1/4)"to expand on that, the rigol has the 8gsamples, 500kwfrms/s (still gotta check if that's on all the time) and per channel controlsthe siglent has all the other stuff I listed.that's all I managed to get so far. am I missing anything important.I don't know if the positives of the rigol make it a better choice for me over the siglent. It's not like I've compared 8gs vs 2gs IRL. I think that's why Sighound36 is suggesting that i try them both.you are right, I'm set. just last moment hesitation , making sure I didn't miss anything obvious.it's not about the 400$ as such. just trying to see if it's "well spent".

author: tv84
author_rank: Super Contributor
timestamp: July 08, 2020, 02:19:05 pm
content: Many guys here can add plenty to the list of Rigol pros BUT that's not important anymore!!You have already selected what you think are the most (subconcious or not) relevant factors for you.So pull the trigger. As I've said before, remember, this is your decision. If you have the $1500 you won't regret it.

author: Ctrlocti
author_rank: Regular Contributor
timestamp: July 08, 2020, 02:41:57 pm
content: eh I can still swing either way. I'm set, but its a soft set. just making sure it's an informed decision. I would love to hear more pros for the rigol. I've been reading spec sheets and manuals for a couple days now but spec sheets and numbers can't tell you everything.Let's say that theoretically both scopes were the same price. both 1500 or 1000 (different scenario). how would that change the value proposition of either scope?It's not directly relevant to my choice between the two scopes. It was just a question I had going through my mind earlier, I thought it would be interesting to hear your thoughts.

author: tv84
author_rank: Super Contributor
timestamp: July 08, 2020, 02:57:42 pm
content: Quote from: Ctrlocti on July 08, 2020, 02:41:57 pmIn China the Siglent is $1000!In that case it's a no brainer.So, the Siglent is the best one? No, for $1000 (in the west) the Rigol is best.So, you just have to see if the Rigol covers all your needs (as many guys have advised). If so, why go higher? If there is a fancy detail (screen size, hires BS, etc) that tickles you, then add the extra cash.

author: Ctrlocti
author_rank: Regular Contributor
timestamp: July 08, 2020, 07:33:56 pm
content: OK, I see what you mean. Yeah I'm definitely splurging with the Siglent. It's luxury. On the other hand, my main question is what are the trade-offs? What am I losing that the Rigol has to offer, but the Siglent is lacking?8 and 4 gigasamples4 math channelsper channel controlshdmi outputI couldn't find any info on the wfm/s capture rate in the manual. just says over 500k lolI think I can live with this.

author: Martin72
author_rank: Super Contributor
timestamp: July 08, 2020, 10:41:11 pm
content: Quote from: nctnico on July 06, 2020, 09:36:19 pmHere, hands up...Owned formerly a full optioned MSO5K I was disappointed on how they handle firmware update rate, also the noiselevel of the frontend was disappointing.Then the siglent sds2k+ came along...Bigger, brighter, better screen, better response of touchscreen, better UI, better performance in general (not overall), 50ohm inputs, autosense inputs, eres functions which works, comes with 200mpt memory without hacking, comes with several serial decodings without hacking, could be upgraded up to 500Mhz, more quality build and look in general and the first fw update got two new features...Didn´t regret the change at any time, but both scopes got one thing in common:For a beginner, there are more models wide under their prices avaible.

author: Ctrlocti
author_rank: Regular Contributor
timestamp: July 09, 2020, 04:41:45 am
content: Quote from: Martin72 on July 08, 2020, 10:41:11 pmWhat does the difference in gigasamples between the two scopes actually look like in real life? Did it make a difference to you and if yes, at what bandwidth?

author: tautech
author_rank: Super Contributor
timestamp: July 09, 2020, 05:53:27 am
content: Quote from: Ctrlocti on July 09, 2020, 04:41:45 amRemember you need factor in how many channels are used and how they are used for 4ch Siglent DSO'sAll current 4ch Siglent models use 2 ADC's and in case of SDS2004X Plus models 2*2 GSa/s, each with 200 MPts support.Therefore using 2 channels, one on each ADC both have 2 GHz sampling and 200 Mpts mem depth.A fully optioned SDS2354X Plus with 500 MHz option still offers 2 GSa/s on 2 channels which comfortably meets Nyquist.When 4 channels are active sampling falls to 1 GSa/s/ch and the total memory depth is divided equally for 100 Mpts/ch where @ 350 MHz Nyquist is still met.If we were to use the scope exclusively in Dot mode the lesser sampling rate would be apparent in captures where less data points would be present.

author: Ctrlocti
author_rank: Regular Contributor
timestamp: July 09, 2020, 09:42:42 pm
content: Quote from: tautech on July 09, 2020, 05:53:27 amyep, I'm aware. Just pondering about the real-life application of the difference between 8gs vs 2gs, 4 vs 2 and 2 vs 1 on a trace at X signal frequency. Nyquist is technically met even with the 500mhz on the Siglent, but what does it really mean to have 40 sample rate: signal frequency compared to 10 or 20 ratio? In real terms I mean. Does it matter? What's that golden ratio? Nyquist says 2 but eh...It's like when talking about any tool - we all want the bigger, better number but there is a point where that number is good enough and it doesn't matter after that point. I like finding those points, it's interestingAnyway this is more of a theoretical conversation.

author: bdunham7
author_rank: Super Contributor
timestamp: July 09, 2020, 10:21:37 pm
content: Quote from: Ctrlocti on July 09, 2020, 09:42:42 pmI think 10 is good enough, but others claim the correct answer is 42.

author: tautech
author_rank: Super Contributor
timestamp: July 09, 2020, 11:23:04 pm
content: Quote from: Ctrlocti on July 09, 2020, 09:42:42 pmYes, and examined in the Scope Wars thread.You might find the info in this post interesting:https://www.eevblog.com/forum/testgear/scope-wars/msg3121780/#msg3121780

author: Martin72
author_rank: Super Contributor
timestamp: July 09, 2020, 11:55:31 pm
content: We have some good old classics from lecroy here, Waverunner LT series.200Mhz/200MSa/s, 500Mhz/1GSa/s, 350Mhz/1GSa/s...And they all did their job.First I was expressed from the 8GSa/s the rigol mso 5k offers ( and to be honest, this value is still a groundbreaker in it´s class and beyond, noticed on the paper).But very soon I´ll take notice that in practice you won´t loose a thing having this or "only" 2GSa/s.So as always I go along with tv84 when he say, if you can spend max. 1000 bucks get the rigol 5000, if you can spend 400 bucks more, go for the siglent 2k+.Mic drop...

author: Ctrlocti
author_rank: Regular Contributor
timestamp: July 10, 2020, 05:49:30 am
content: Quote from: bdunham7 on July 09, 2020, 10:21:37 pmnice one

author: Ctrlocti
author_rank: Regular Contributor
timestamp: July 10, 2020, 05:50:12 am
content: Quote from: tautech on July 09, 2020, 11:23:04 pminteresting thread, thanks

author: Ctrlocti
author_rank: Regular Contributor
timestamp: July 10, 2020, 05:52:58 am
content: Quote from: Martin72 on July 09, 2020, 11:55:31 pmI already got it yesterday. Just musing on the difference of gigasamples. Did you notice a point (in signal frequency) where the extra GSa/s of the rigol were useful to you? Or you didn't push the scopes that high?