Oscilloscope Bode Plot Speed Comparison - Page 1
Forum section: electronics / testgear

author: Martin72
author_rank: Super Contributor
timestamp: June 22, 2023, 07:23:49 pm
content: Hi,Quotehttps://www.eevblog.com/forum/testgear/oscilloscope-recommendation-ds1054z-sds1104x-e-gds-1104b-etc/msg4919146/#msg4919146To keep the other thread "clean", I open up a new one.This is not meant to be a "mine is longer than yours" thread, just a matter-of-fact observation of how quickly each scope processes asingle sweep pass.The conditions should be as equal as possible, otherwise it makes no sense.I can contribute measurements with an SDS2104X+, an SDS2504X HD and an SDS1104X-E.The means:-Demoboard from Batronix with lowpass and bandpass filters(or similar filter)-External frequency generator via USB, also for the two SDS2000s, since the SDS1104X-E has no internal one.-Frequency range: 200Hz...10Mhz-Frequency mode: Decade-Number of measurement points per decade: 105-Amplitude: 0.71Vrms-1st pass with one DUT output (lowpass)-2nd pass with two DUT outputs (lowpass and bandpass)-3rd pass with three DUT outputs (LP,BP and "Linear", i.e. signal input)Today I did this at work with a SDS2104X+, here are the results:1.pass: 7min37sec2nd pass: 8min46sec3rd pass: 10min21secAt the weekend the 2504X HD and the 1104X-E will follow, I will make a table.Gladly seen are further results, from other models, like e.g. SDS5000X, SDS6000, Rigol MSO5000 and the R&S models.Conditions are clear, the same means must be applied.Then we can see what other tests we can do under what conditions.

author: jjoonathan
author_rank: Frequent Contributor
timestamp: June 22, 2023, 08:24:36 pm
content: Anritsu MS4630B:10Hz-10MHz1st pass: 200ms2nd pass: 200ms3rd pass: N/A (not enough channels)Points: 501Dynamic Range: 109dB (noise floor with input terminated, settings unchanged -- you can eek out more by sweeping slower)QuoteExactly, it's a "mine is shorter than yours" thread!Kidding aside, I would love to save the space and get rid of my low frequency network analyzer, even if it meant settling for something significantly less good. Unfortunately the integrated oscilloscope bode plotters I've seen are so terribly slow that I am not even tempted. Hopefully this will change, or has changed and we'll see proof in this thread -- but live updates are something I won't live without. They calibrate your intuition as to the quality of your setup and the sensitivity to environmental factors, fixturing, etc that you just don't get with "go get a coffee" sweep times.

author: Martin72
author_rank: Super Contributor
timestamp: June 22, 2023, 08:49:15 pm
content: Hi,QuoteNice to know how fast it can go - when you don´t use a scope for it.Not really comparable in the sense of this thread.

author: jjoonathan
author_rank: Frequent Contributor
timestamp: June 22, 2023, 09:44:27 pm
content: Scopes could plot this fast if they tried. I suspect they could hit the dynamic range too, possibly with a few caveats on the limitations of process gain. Scope bode plots don't suck because the architecture forces them to suck, they suck because they aren't trying very hard. What we have now are bode plots written by interns using SCPI functions, not bode plots written by graybeards using verilog.Now that I've said my piece I'll stand aside and enjoy the sloth race

author: nctnico
author_rank: Super Contributor
timestamp: June 22, 2023, 10:21:28 pm
content: Quote from: jjoonathan on June 22, 2023, 09:44:27 pmI don't think that is entirely true. What oscilloscopes lack is steep filters in hardware so there is quite a bit of processing involved so sift through the incoming signal. The R&S RTM3004 needs about 80 seconds to do a sweep from 200Hz to 10MHz which is over 5 times faster compared to the Siglent scope. I doubt the RTB2004 is slower as the basic platform is mostly the same.BTW: I have an Anritsu MS4630B as well which I use for my frequency analysis needs (paid around $450 for it which was money well spend).

author: thm_w
author_rank: Super Contributor
timestamp: June 22, 2023, 10:35:42 pm
content: Quote from: nctnico on June 22, 2023, 10:21:28 pmThere is no filtering processing is there, I don't think?Scope sets gen to 1kHz -> waits a bit for signal to stabilize -> measures amplitude and phase on CH1 -> scope sets gen to 1.1kHz -> etc. fairly simple process.Its mostly the waiting around bit that is taking the time. Which obviously goes way up when you put a large number of points in.

author: Fungus
author_rank: Super Contributor
timestamp: June 22, 2023, 10:55:01 pm
content: Quote from: jjoonathan on June 22, 2023, 08:24:36 pmI was told very sternly by forum members that a Bode Plot should show phase as well, otherwise I can just feed some white noise into my 'scope and do an FFT to get a real time display of frequency response.

author: Martin72
author_rank: Super Contributor
timestamp: June 22, 2023, 11:01:16 pm
content: QuoteYap,you can watch this on the display of the gen - tick...tick...tick and from 1Mhz on it goes faster.I don´t have a problem with the "speed" of this process, I´m not in a hurry.And I already knew it from other applications like ARTA ( Speaker measure program suite).Where the frequency response is measured very fast (due impulse) and thd is real "slow".There are other things around this bode mode that are annoying.But this is not a point here.

author: nctnico
author_rank: Super Contributor
timestamp: June 22, 2023, 11:49:01 pm
content: Quote from: thm_w on June 22, 2023, 10:35:42 pmNo, it is not simple as thatThe software needs to apply a steep filter (single tone FFT / Goertzel filter) to retrieve the transmitted tone from the signal and determine magnitude & phase from that. Otherwise the result is affected by noise, auxilary frequencies (switching power supplies for examples) and harmonics from non-linear DUTs. It is possible the tone that is measured is swamped by a tone at a different frequency.

author: Someone
author_rank: Super Contributor
timestamp: June 23, 2023, 12:26:27 am
content: Looks like a rehash of:https://www.eevblog.com/forum/testgear/bode-plot-computational-time-for-various-dsos/?all

author: thm_w
author_rank: Super Contributor
timestamp: June 23, 2023, 01:25:08 am
content: Quote from: nctnico on June 22, 2023, 11:49:01 pmIs that confirmed on all scopes though? There is a post from Someone here stating cursor measurements may be used:https://www.eevblog.com/forum/testgear/bode-plot-computational-time-for-various-dsos/msg4510168/#msg4510168For the ones that use FFT, a comparison might mostly depend on whatever memory depth/timing parameters the manufacturer decided to go with. Although R&S did have a fast FFT so it could help.

author: Anthocyanina
author_rank: Frequent Contributor
timestamp: June 23, 2023, 04:34:32 am
content: the AD2 does it in under 20 seconds. this is an active low pass filter, the same test conditions, 200Hz to 10MHz, 105 points per decade. It shows the bandwidth warning, and in the yellow trace you can see the measured wavegen gain compared to what it is supposed to be, it goes to -3db at around 9MHz and remains flat up to about 2.2MHz, but still, that doesn't affect the bode plot speed, only its accuracy. I'll do keysight 1102g next and report!1102G takes 5 minutes 24 seconds, and things get very weird near -18dB

author: Berni
author_rank: Super Contributor
timestamp: June 23, 2023, 05:42:40 am
content: Quote from: Fungus on June 22, 2023, 10:55:01 pmThe Agilent 89410A will do a bode plot just as fast as that and can display phase or group delay too.On top of that it will also do 85dB of dynamic range. See signals down to -140dBm and will also compensate for the DUT loading it down the signal source as it has 2 inputs and plots the difference between the two inputs.It really is a bode plotting machine. Tho due to this thing being from the 90s it has taken a lot of hardware to pull this off, making it a huge 21kg boat anchor and draws 100s of watts of power.

author: skander36
author_rank: Frequent Contributor
timestamp: June 23, 2023, 08:19:06 am
content: Quote from: nctnico on June 22, 2023, 10:21:28 pmRight! RTB2K 74.1 s for 200Hz-10MHz, 105 points, low pass filter.Rigol 5K - 5min 45s same parameters.

author: rf-loop
author_rank: Super Contributor
timestamp: June 23, 2023, 08:21:17 am
content: Some common comments about FRA aka BodePlot. Bit OT because this do not include speed test but some comments relative to this and specially relative to comparing.There are different ways to do it in normal oscilloscope. And when do compare then need carefully think what we compare... ok now speed but without caring any other things...But also there are many differences in performance and example in speed.Different oscilloscopes may use very different way to do BodePlot what leads then also very different performance. .Also user can set most optimal settings for different cases (after he well know how it works and how to setup)Some tiny examples.Full dynamic range when Channel Gain = AutoFrom displayed noise floor to +40dBm. Yes it can do whole range (up to 140dB) in single sweep. (when 1M input or External 50 ohm load what can handle these max powers)Example: one 455kHz IF filter (lot of better than in normal cheap radio)There are many oscilloscopes what have BP... many of them can not do this, not even close.Also this Siglent oscilloscope FRA can not measure where is real stop band... because oscilloscope noise level is far too high. But with this we still know stop band is least what is displayed.Simple example: One 84.050kHz resonator. Even in this simple example dynamic range is over 100dB(in this picture one div is 5 Hz)There are many oscilloscopes what have BP... many of them can not do this, not even close. IN many oscilloscopes BodePlot is just for checkbox feature for marketing. They can do some RLC filter etc very simple cases, lot of fun but in bit more challenging cases they fails. Of course there are also oscilloscopes what have good FRA also for bit more difficult things than just for easy playing... also example some Nnao like VNA's are out as...snow man in summer.Then what it mean it is based to frequency selective receiver...Systems what do not have frequency selectivity can not do good job when there exist strong harmonics or spurs what also DUT can produce and specially in many cases when we do control loop analysis is some PSU etc.Some random example about Siglent FRA frequency selectvity when it sweeps.Keep in mind that this is not normal BodePlot sweep when BodePlot control Generator.Here BodePlot "sweep" over 200kHz to 700kHz frequency band, but input to Channel 4 is 455kHz fixed frequency signal so we can see BodePlot selectivity figure in this point.About speed.It is good to remember that with Channel Gain Auto sweep is much slow than Ghannel Gain Hold.Also speed may be different depending input levels when Channel Gain Auto (some may call it as AGC).Also speed may be different depending communication between oscilloscope and generator.It is good to realize that after every frequency hop first it need solve level and adjust optimal V/div using input channels fine steps. After every step it can do full adjust for all channels in use (500uV to 1V/div when 50ohm and 500uV - 10V/div when 1Mohm)Naturally when AGC is off (HOLD) measurement dynamic range is reduced. Still enough for most cases (but it need also that user carefully set first this optimal settings for input channels so that input signals do not clip in any case.)Also for normal passive low order filters we really do not need so many steps as is used in OP test example (naturally this is ok for speed test purpose as used well ok)With low frequencies this is still slow. It simply can not do it faster as long as we keep same measurement performance because this IS time domain oscilloscope and all is still based to it.Example for low frequencies (10Hz - 100Hz)100ms/div horizontal speed takes 100ms/div. 10 div take 1s and then... whole this 100kpts need FFT and repeating... repeating until enough for solve level and specially phase, and then go to next frequency step. Higher frequencies naturally t/dif is faster and FRA steps are then faster.If reduce this, also performance is reduced.Example some AD2 can do it much faster. AFAIK it do not work as frequency selective sweeping receicver. If there is some other signals, say example harmonics or non harmonic spurs it also listen these.Naturally there can do quite fast in oscilloscope BodePlot if use more or less different method, and reducing reducing performance. Also Siglent can do. But 100dB or max 140dB dynamic range (with also good harmonics and spurs attenuation) is not so easy peace of cake.So, When compare do not compare oranges and shoes. Not even apples and oranges or let us also then know all about performance differences. Speed is just one thing.Then as @Berni well said... some real "bodeplotters", as example Hewlett-Packard 89410A (Sadly Lady Fiorina destroyed Hewlett-Packard, later known as Agilent and Keyshitg)These instruments are very extremely different "animals" and expesive and they do just this but, and well, but not lot of other things. These BodePlot performance is really in different level.. as also price.I remeber in old times I have some R&S dedicated "bode plotter". One was heavy and expensive R&S SWOB IV. Fast and "nice" to use for some filters etc. But not nice to move (heavy).

author: nctnico
author_rank: Super Contributor
timestamp: June 23, 2023, 10:09:44 am
content: Quote from: Berni on June 23, 2023, 05:42:40 amThe MS4630B can do all that (and much more as it is a network analyser) but jjoonathan just didn't show it.

author: tautech
author_rank: Super Contributor
timestamp: June 23, 2023, 10:25:32 am
content: Quote from: nctnico on June 23, 2023, 10:09:44 amJust as the 4 port 4.5 GHz SNA5004A then hacked to 8.5 GHz I had could do too but where does one stop ?I believe it would be useful for the OP to add 'Oscilloscope' to the topic title of this thread.

author: Berni
author_rank: Super Contributor
timestamp: June 23, 2023, 11:34:21 am
content: Tho now that i look back at this, most of what makes the Agilent 89410A so fast could be done on any modern scope too.The 89410A has a weird semi digital architecture that actually has quite a bit in common with digital oscilloscopes. The architecture of it is basically a SDR, the analog side is just an analog front end feeding a ADC. All the rest happens in the digital domain where it has dedicated DSP hardware for processing all that data in real time as it streams out of the ADC. All the spectral analysis features are actually done in the digital domain.Sure the ADC it uses has more bits (14bit i think) and the front end is lower noise, but apart from that it is basically the same as a scope. With how much more powerful CPUs have gotten since the 90s we could probably run all the processing in software now.The way it does bode plots is by generating a sine sweep waveform and feeding it into the arbitrary signal source. Then it synchronizes the acquisition with the source and does FFT on what it got back. So the sweep is basically just a more predictable replacement for 'white noise' in other to get a broad frequency signal to excite the DUT. This means it only needs to do one FFT per sweep, so it can do multiple sweeps per second.I don't see why oscilloscopes don't do the same thing given that they have ARB signal generators and already have FFT capability. All of the scopes with bode plot functionality seam to do the thing where they step trough frequencies one by one and do a one shot amplitude/phase measurement at each one, this is obviously very very slow.

author: jasonRF
author_rank: Regular Contributor
timestamp: June 23, 2023, 12:25:27 pm
content: Unless you know the gory details of how the scope is doing the analysis, these will all be apples to emu comparisons.For example, using my picoscope 5244B with the FRA4Picoscope app I can change the time by orders of magnitude by adjusting the parameters. If I assume it is a low-noise environment and ask for at least 16 cycles of the waveform, then it takes about 24 seconds. On the other hand, if I assume a high-noise environment and ask for at least 10 Hz resolution bandwidth, I get just a couple of samples per second even at the highest frequencies. Of course at those high frequencies it needs to collect (and transfer over usb 2) huge numbers of samples. I'm sure if I go to even narrower resolution it will slow down accordingly.I have never dug into the details of how that app works, so don't even know if it does averaging. In principle, this is another knob that can be adjusted (if it isn't already). And then the app has an adaptive mode where it adjusts the signal amplitude, in order to use it with SMPS where too large of a signal can of course cause problems. I have never worked with that, but presumably that can make it even slower.When writing my own code to do FRA with simple, shallow-memory scopes (Owon vds1022 and Pico 2204a), I usually assumed a low-noise environment so did no averaging. I still get ~70 dB dynamic range (~40 from the scope, ~30 from the several-kSample FFT). In this case at low frequencies I just wanted X cycles of the waveform and maximized the sample rate given the number of samples available; but at high frequencies where I need to use the max sample rate, I end up with a 'constant resolution bandwidth' approach since I don't want use smaller FFTs at the higher frequencies. If you go down to, say, 1 Hz, then collecting data and needing to do things like adjust the vertical scale just slows things down a ton, so I always start with the highest frequencies and work backwards to minimize those low-frequency vertical scale adjustments. The AD2 has the advantage of not needing any such adjustments, which can help speed it up.jason

author: mawyatt
author_rank: Super Contributor
timestamp: June 23, 2023, 03:13:31 pm
content: Quote from: tautech on June 23, 2023, 10:25:32 amAgree, this should be aboutScopeBode Function, FRA or whatever one wishes to call this capability, not all inclusive of other instruments. We all know, or should know, that the dedicated instruments mentioned (likely many more) are going to perform better than the DSO under Bode display & analysis.A DSO is a Time Domain instrument, designed as such, however does respectable service (at least some do) when asked to perform some service in the Frequency Domain (FFT or Bode).To put this in perspective, would anyone consider comparing a SA, VNA, Frequency Response Analyzer, Bode Analyzer to display Time Domain waveforms and expect it to perform on par with a modern DSOBest,

author: nctnico
author_rank: Super Contributor
timestamp: June 23, 2023, 04:51:01 pm
content: Quote from: jasonRF on June 23, 2023, 12:25:27 pmLogic dictates that every FRA implementation uses narrow bandwidth filtering aka selective frequency detection. Otherwise any DUT other than a simple RC filter will give false readings.

author: jasonRF
author_rank: Regular Contributor
timestamp: June 23, 2023, 05:27:50 pm
content: Quote from: nctnico on June 23, 2023, 04:51:01 pmAgreed, but even in this framework you can adjust parameters that can change the time dramatically by changing how “narrow” you desire, determining how much averaging you need, etc. Of course some measures of performance will also change with these decisions (dynamic range, immunity to noise, phase estimate accuracy, etc). With the picoscope example, with 1% resolution bandwidth (at least 100 cycles) it takes < a minute. Requiring at least 10 Hz absolute resolution takes about 10 times as long. I would call both “narrow”, but they do not yield identical performance.Jason

author: mawyatt
author_rank: Super Contributor
timestamp: June 24, 2023, 04:11:46 pm
content: Had a few moments late last night and decided to give the PicoScope 4262 a try, this has 16 bit ADCs and a high quality built-in AWG, however the AWG is limited too <20KHz, and the scope to <5MHz.The FRA software for the PicoScopes was created by Aaron Hexamer, we are using version 0.7.3b (need to look for a later version if available). This is quite a nice implementation by Aaron, and definitely utilizing a Frequency Selective sampling scheme, with various parameters controlling such available to the user.The only criticism of this software is the lack of a linear frequency scale, however the hardware (4262) has very limited AWG frequency range of <20KHz, so the ability to work with an external AWG would be nice.We conjured up a Peltz Oscillator at ~10KHz for the Bode plot of the Injected Oscillator. After some fiddling around with the various parameters working with a Noise Rejection BW of 3Hz with high levels of oversampling and Noise Rejection parameter, this was very slow but produced some outstanding resultsThis morning we decided to try the Analog Discovery 2, only to "Discover" that we couldn't download the basic scope operating software for either a Mac nor PC after jumping thru a bunch of hoops and getting an"access denied error messages"when attempting the download from a Mac or PC. This sent us searching for an answer on their user site, only to find nothing specific regarding such, which then required site registration and a very unusual method of verification which employs getting various letters from certain words and then added another with other letters which we failed to understand or execute properly, after several failed attempts finally getting thru. So not very impressed with Diligent so farIf we get the AD2 working we'll attempt a Bode plot of the mentioned oscillator.Best,

author: Fungus
author_rank: Super Contributor
timestamp: June 24, 2023, 04:48:42 pm
content: Quote from: mawyatt on June 24, 2023, 04:11:46 pmAll this test gear but no stopwatch or enough disk space for a screenshot?

author: 2N3055
author_rank: Super Contributor
timestamp: June 24, 2023, 04:55:20 pm
content: Quote from: Fungus on June 24, 2023, 04:48:42 pmNo need to be disrespectful and rude...

author: 2N3055
author_rank: Super Contributor
timestamp: June 24, 2023, 05:07:04 pm
content: Had a bit of time.Keysight MSOX3104T.200Hz - 10MHz101 points per decade (boils down to 478 points).ONLY ONE (1) channel analysis (Siglent can have 3 simultaneously).4 minutes, 34 secondsSo in order to measure 3 band active X-over 13 minutes, 30 seconds roughly with probes reconnecting overhead between 3 runs...It shows how everything is relative, depending what you do...Some comments: Keysight uses some different method. With Siglent's and Hexamer FRA approach measuring at lower frequencies takes more time at lower frequencies and gets faster as it goes to higher ones. With MSOX3104T, it is almost same speed all the time... As if almost like it uses standard phase/amplitude measurements on just few periods...

author: nctnico
author_rank: Super Contributor
timestamp: June 24, 2023, 05:32:05 pm
content: More likely the algorithm is more optimised. You can pre-filter / mix a signal to decimate it to a dataset with a fixed length and thus make the time needed for analysis constant.

author: Martin72
author_rank: Super Contributor
timestamp: June 24, 2023, 05:45:13 pm
content: QuoteYousay that...

author: 2N3055
author_rank: Super Contributor
timestamp: June 24, 2023, 06:05:51 pm
content: Quote from: nctnico on June 24, 2023, 05:32:05 pmYeah I get what you're saying, but it shows time domain data, and it is always a screen with exactly 4 periods shown. At every frequency..Could be just display..

author: Martin72
author_rank: Super Contributor
timestamp: June 24, 2023, 06:53:06 pm
content: Hi,Today the tests with 2504X-HD and 1104X-E.Same settings as before because we want to compare apples with apples.To my surprise the bodeplot on the 1104X-E allows three outputs just like the 2000 series.So I test the 2014X-plus, 2504X-HD and 1104X-E.And the "winner" is...The little 1104X-E.Nearly the half of time for all situations and :Bode stopping and Bode ending is executed immediately, unlike the large models.Here the times, later a little table:SDS2504X-HD:1. 6min54sec2. 8min33sec3. 10min11secSDS1104X-E:1. 3min39sec2. 4min43sec.3. 5min47secWould like to see other results, ideally with the demoboard or similar filter*And with R&S RTB, SDS5000X, SDS6000A or similar model..Martin*) will examine the board, then present the circuit (it´s passive)

author: KungFuJosh
author_rank: Super Contributor
timestamp: June 24, 2023, 07:55:26 pm
content: Quote from: Martin72 on June 24, 2023, 06:53:06 pmDid you use the same AWG for all of the tests, or did the models with internal AWGs get the internal AWGs used?

author: Martin72
author_rank: Super Contributor
timestamp: June 24, 2023, 08:15:19 pm
content: Hi,As described in the first post, I also use an external generator for the 2000 models because the 1104 does not have an internal one.At work, with the 2104X+, it was a SDG1062X, here at home a SDG2122X.That should not play a role for the speed.And as I'm writing this, I could have done without the external ones on the 2000s, because their internal generators should also run via usb (internal).

author: Martin72
author_rank: Super Contributor
timestamp: June 24, 2023, 09:31:06 pm
content: QuoteUnder the (wonderful) andonstar microscope you can see three components for the filter, a coil, cap, resistor.Measuring them with my mastech LCR tweezer, the Resistor is 470ohm, the coil 118µH (I guess 100µH)a and the cap varies between 1µF and 1nF depending on the testfrequency.Not to forget the jumpers on the board for termination:50 ohm to ground, 75 ohm terminal in to the filter.Because of the "unknown" cap I run a simulation, 100nF should be the right value..The simulation is close enough to say these are the values you could take for the filter ( Lowpass: Signal after the coil, bandpass: signal after the cap.) when you don´t have the demoboard(99.99% of all contributors here I guess..)Martin

author: M Harris
author_rank: Newbie
timestamp: June 25, 2023, 03:19:49 am
content: Keysight MXR608A, about 1.2s per point.

author: Performa01
author_rank: Super Contributor
timestamp: June 25, 2023, 08:00:40 am
content: Quote from: M Harris on June 25, 2023, 03:19:49 amSo for ~500 points its a total of 10 minutes.

author: mawyatt
author_rank: Super Contributor
timestamp: June 27, 2023, 05:43:19 pm
content: Not to confound this thread, which is about DSO Bode Plot relative speed with a given DUT, but to update our issues with the Analog Discovery 2 we mentioned earlier. The site for the operational software for the AD 2 was fixed, and we were able to download such.We were able to get the AD 2 to perform with the mentioned 10.5KHz Peltz Oscillator under Injection Locking conditions. To get meaningful displays required narrow bandwidth, multiple waveform cycles and averaging, all settable parameters like the PicoScope FRA utilizes, and also slow as expected. Once these parameters were honed in the AD 2 performed admirably, actually better than expectedKeep in mind we are asking these measurements to be performed on a difficult DUT. Where the large "noise" or "interference" is considered, as this "noise" will get very close to the measurement frequency, then actually becomes the measurement frequency under locked conditions, then releases after lock is lost and the measurement frequency moves away when sweeping upwards.Would be nice if the knowledgable folks at Siglent (and others) would offer some user selectable parameters which have a direct influence on the measurements at hand, such as those offered with the PicoScope FRA and the Analog Discovery 2Best,

author: teddychn
author_rank: Regular Contributor
timestamp: July 03, 2023, 09:11:15 am
content: Here is the comparison of 61-points Bode test between AD2, SDS2074X Plus and SDS2104X HD. The generator signal amplitude was fixed at 500mV.AD2 : 17.6 SecSDS2074X Plus : ~ 177 SecSDS2104X HD : ~ 177 Sec

author: tautech
author_rank: Super Contributor
timestamp: July 03, 2023, 09:16:13 am
content: Quote from: teddychn on July 03, 2023, 09:11:15 amUse of the blue Print/Save button for screenshots on the front panel preserves the menu in use showing your settings.

author: techneut
author_rank: Regular Contributor
timestamp: July 03, 2023, 04:08:45 pm
content: And here is the SDS5034X:1 9.05,292 11.03.933 Timing error, will do it again

author: teddychn
author_rank: Regular Contributor
timestamp: July 05, 2023, 04:24:35 am
content: Sorry, I haven't noticed the testing criteria and posted my previous test data for the SMPS loop gain test.Here is the test result of AD2 with a very similar configuration:Bandbass : 21.5 SecBypass : 21.1 Sec