Siglent SDG7000A 350, 500 MHz and 1 GHz AWG's  - Page 1
Forum section: electronics / testgear

author: tautech
author_rank: Super Contributor
timestamp: April 15, 2021, 09:40:39 am
content: New range of highly featured dual channel AWG's.SDG7032A 350 MHzSDG7052A 500 MHzSDG7102A 1 GHzReleased March 2022FeaturesDual-channel differential or single-ended analog outputs24 Vpp analog output capability with ±12V DC bias, maximum ±24V (48 V) output range (See datasheet)5 GSa/s digital-analog sampling rate and 14-bit vertical resolutionMem depth 512 MptsSine, Pulse, ARB, PRBS, Noise and IQ (option) waveformsArbitrary waveform sampling rate 2.5 GSa/s and vector waveforms to 500 Mb/sPRBS patterns up to 312.5 MbpsAM, FM, PM, FSK, ASK, PSK, DSB-AM and PWM analog and digital modulationMinimum pulse width 1 ns and minimum Rising/Falling edge 500 psHardware frequency counter5 inch capacitive touch screen, resolution 800x480; supports external mouse and keyboardI/O; USB Host, USB Device (USBTMC), LAN(VXI-11/Telnet/Socket), external modulation/frequency meter input, reference clock Input, reference clock output, Marker output, Trigger In/Out, etc.SCPI remote controlWebServerWireless mouse suppliedOptionsDigital bus 16-bit, LVTTL or LVDS output Bit rate 1 μbps ~ 1 Gbps10M_OCXO (factory install only)IQ signal generation function (software)Datasheet:https://int.siglent.com/u_file/document/SDG7000A_Datasheet_EN01A.pdfhttps://int.siglent.com/products-overview/sdg7000a/https://www.siglenteu.com/waveform-generators/sdg7000a-arbitrary-waveform-generator/https://siglentna.com/waveform-generators/sdg7000a-arbitrary-waveform-generator/

author: tv84
author_rank: Super Contributor
timestamp: April 15, 2021, 10:08:18 am
content: Slick design. Bad news for many and their SDG6000 unit...

author: TurboTom
author_rank: Super Contributor
timestamp: April 15, 2021, 10:37:43 am
content: Curious about the pricing. Will probably be a completely different league compared all their legacy AWGs. I agree with tv84 that this may be the "death sentence" for the SDG6000X units regarding "real" firmware polishing. It would be interesting to see if some of the suggestions posted here on improvements of the 6000x series have been implemented in this new AWG...

author: 2N3055
author_rank: Super Contributor
timestamp: April 15, 2021, 11:36:00 am
content: One interesting thing is mixed signal generation: 2 analog AWG + 16ch pattern gen.Big sucker too..

author: TurboTom
author_rank: Super Contributor
timestamp: April 15, 2021, 11:43:34 am
content: Wow -- seems to be dissipating some serious power:Or maybe Siglent implemented three fans so they can be ran at a lower speed, which would improve (acoustic) noise emission considerably. This would be a clever move.

author: Berni
author_rank: Super Contributor
timestamp: April 15, 2021, 11:52:54 am
content: The datasheet says it consumes 90W so you would want more than 1 fan blowing trough there for it to be nice and quiet.Very nice piece of kit this thing, tho it will most likely be way out of my price range.

author: 2N3055
author_rank: Super Contributor
timestamp: April 15, 2021, 12:00:46 pm
content: Quote from: tv84 on April 15, 2021, 10:08:18 amNot necessarily..This thing is high end, they still need SDG6000X for mid range AWG..

author: nctnico
author_rank: Super Contributor
timestamp: April 15, 2021, 12:20:16 pm
content: Quote from: 2N3055 on April 15, 2021, 12:00:46 pmI don't think the remark is about pricing but the effort Siglent is going to put into finishing the firmware for the SDG6000.I'm also not sure how useful the digital pattern outputs are going to be. In my experience a digital pattern generator needs a different approach compared to a signal generator. Being able to import (script) generated patterns for groups of digital bits (say 2 bits for an I2C bus, 3 bits for SPI, 8 bits for some counter logic) is essential. I have owned AWGs before which had this feature but the software side just wasn't powerful enough to make it useful.You may think that having digital outputs parallel to the output DACs is enough but it isn't. Makeing a good pattern generator takes an entirely different approach on the software side compared to an AWG. It needs treating each output bit as an individual output channel with the option of grouping them.

author: 2N3055
author_rank: Super Contributor
timestamp: April 15, 2021, 12:45:28 pm
content: Quote from: nctnico on April 15, 2021, 12:20:16 pmNeither did I comment about price. I meant that Siglent cannot casually abandon product because they still have to rely on it for a certain market segment.As for other comments about usefulness, I agree it will depend on how well it will be implemented.For that we will have to see.. I hope EasywaveX will be enhanced to make this work well on PC..

author: tv84
author_rank: Super Contributor
timestamp: April 15, 2021, 02:56:50 pm
content: Quote from: TurboTom on April 15, 2021, 10:37:43 amWith your contributions you should be entitled to a trade in voucher!

author: egonotto
author_rank: Super Contributor
timestamp: April 16, 2021, 12:39:37 am
content: Hello,"Mem depth 512 Mpts" with EasyWave it takes agesBest regardsegonotto

author: hpw
author_rank: Frequent Contributor
timestamp: April 16, 2021, 06:29:36 am
content: Quote from: TurboTom on April 15, 2021, 11:43:34 amLooks like a HP server rack... so Siglent needs to provide any dbSPL figures or as an option any hear protections..Anyway, using 16 bit with low levels, any proper dithering, 16Bit would generates -120dBFS signals and missing gear to measureGood is the larger front panel, while SDG2K & SDG6K using the keypad and gorilla fingersso nice Chinese girl with thin fingers to goHp

author: TurboTom
author_rank: Super Contributor
timestamp: April 16, 2021, 08:35:50 am
content: I also doubt the usefulness of the pattern generator module. But since apparently there are four "proper" output stages present, a rather interesting option would be to not only use them to provide two differential signals but to also implement a four-channel pulse mode. In this case, only single-bit "D/A converters" (i.e. analog switches to the min/max reference signals) are required per channel, and with this minimal additional hardware, all kinds of serial protocolls and also drive signals for multi-phase converters and the like could be generated. Of course, this approach won't feature the "easy Pulse" (or whatever it's called) benefits of low jitter, but for "everyday use", one sampling period of jitter wouldn't make any difference from a high-speed generator "screaming along" like that.

author: citizenrich
author_rank: Newbie
timestamp: April 17, 2021, 05:44:19 pm
content: The datasheet also shows a fancy Siglent scope, the SDS 6000 Pro. I've not heard about that one. Does anyone have some links? Google is not too helpful or perhaps my Googling skills are not too great.

author: tautech
author_rank: Super Contributor
timestamp: April 17, 2021, 07:28:48 pm
content: Quote from: citizenrich on April 17, 2021, 05:44:19 pmDon't yet have a release date.Bit about them here:https://www.eevblog.com/forum/testgear/siglent-sds6000-pro-10-and-12-bit-dso-coming/

author: hpw
author_rank: Frequent Contributor
timestamp: April 18, 2021, 07:36:27 am
content: @tautechan interesting option is this one:10M OCXOSo the question rises, will this an internal part or external device?While DSO, SPA & SDG all have the option to sync with an external 10MHz clock!(did already measurements with the Siglent SPA, but the synthesizer jitter of the SPA may made the investment)But any ventilation shacking will degrade the OXCO crystal to hell! So an external reference to use!So no external Siglent OXCO seen so farHp

author: tv84
author_rank: Super Contributor
timestamp: April 18, 2021, 08:36:36 am
content: Tautech's photos show exactly where the OCXO will be inserted. So, it's an additional HW module as usual in other brands.

author: tautech
author_rank: Super Contributor
timestamp: April 18, 2021, 10:11:54 am
content: Quote from: tv84 on April 18, 2021, 08:36:36 amAs yet it's unknown if it will be available as a post sales option or if the unit must be ordered with OCXO pre-fitted from the factory.Eg, the 16ch SC option for SDM bench meters is only available factory fitted.Only time will tell.............

author: TurboTom
author_rank: Super Contributor
timestamp: April 24, 2021, 09:07:10 am
content: Quote from: 2N3055 on April 15, 2021, 12:00:46 pmI tend to agree. And on a second thought, if Siglent is going to keep the existing SDG1000X~6000X design for some years to come, and they are developing a completely new Software/UI for the SDG7000X, it would be a clever move to "down-port" this new design to the existing AWGs to spice up their sales of these instruments. Time will tell which road Siglent follows. I'ld be very happy if it's the projected one but I won't hold my breath...

author: tautech
author_rank: Super Contributor
timestamp: March 02, 2022, 06:22:51 am
content: Now released and OP updated.

author: kaz911
author_rank: Super Contributor
timestamp: March 02, 2022, 01:06:44 pm
content: Quote from: tautech on March 02, 2022, 06:22:51 amSo where are the hacks? Don't they get released at the same time?

author: jjoonathan
author_rank: Frequent Contributor
timestamp: March 02, 2022, 03:06:23 pm
content: > Siglent SDG7032A - Arbitrary Waveform Generator, 2 Channels, 350 MHz> Your Price: $11,389.00

author: tv84
author_rank: Super Contributor
timestamp: March 02, 2022, 03:15:32 pm
content: Quote from: kaz911 on March 02, 2022, 01:06:44 pmMost probably they have preceded the HW. But you still have to buy the HW.

author: mawyatt
author_rank: Super Contributor
timestamp: March 02, 2022, 03:55:49 pm
content: Quote from: jjoonathan on March 02, 2022, 03:06:23 pmYes, pretty expensive AWG, well out of our reach!!We just settled for the SDG6022X instead, with visions of "enhancing/upgrading" it, thinking we were successful in "enhancing/upgrading" our SDG2042X.Unfortunately getting old has its' drawbacks, one is short term memory, and can't remember exactly how we were able to upgrade the SDG2042X!!So we are trying to follow the convoluted path to upgrade the SDG6022X, and not being a computer, firmware, linux, hacker guru makes finding this proper upgrade path all the more difficult, not to mention not remembering how we did the SDG2042X, or the SDS2000X+, or the SSA3012X+ awhile backGetting old sucks, but better than the alternativeBest,

author: tautech
author_rank: Super Contributor
timestamp: March 02, 2022, 07:38:14 pm
content: Quote from: jjoonathan on March 02, 2022, 03:06:23 pmNot sure how you came to that when our pricelist has SDG7032A at $ 9789

author: tv84
author_rank: Super Contributor
timestamp: March 02, 2022, 08:42:43 pm
content: SDG7032A - $11,389.00SDG7052A - $13,989.00SDG7102A - $18,389.00https://www.logicbus.com/SDG7032A_p_31100.htmlSDG7032A - €7,920+VATSDG7052A - €9,730+VATSDG7102A - €12,800+VAThttps://www.siglenteu.com/waveform-generators/sdg7000a-arbitrary-waveform-generator/https://www.batronix.com/shop/siglent/SDG7000A.html

author: tautech
author_rank: Super Contributor
timestamp: March 02, 2022, 10:44:13 pm
content: Who needs a demo unit !Been playing with SDG7102A and a X Plus scope via their webservers in the US.Thanks to a certain undisclosed member that provided access to his network.

author: jjoonathan
author_rank: Frequent Contributor
timestamp: March 02, 2022, 10:49:35 pm
content: Nice!I want access. I have a burning need to determine the root mean square deviation of a differential dick-and-balls signal.

author: tautech
author_rank: Super Contributor
timestamp: March 02, 2022, 10:57:43 pm
content: Quote from: jjoonathan on March 02, 2022, 10:49:35 pmLOL but seriously when doing this stuff with someone else's gear you really need know what you're doing as it would be so easy to blow 50 Ohm scope inputs with the 48V differential signals SDG7000A can provide.

author: tautech
author_rank: Super Contributor
timestamp: March 03, 2022, 01:03:14 am
content: A couple more screenshots captured remotely from my gracious US host.

author: tautech
author_rank: Super Contributor
timestamp: March 03, 2022, 08:54:15 am
content: More nabbed remotely as a guest......1 active channel in differential output mode.

author: Performa01
author_rank: Super Contributor
timestamp: March 03, 2022, 11:34:53 am
content: Some screenshots demonstrating the pulse function of the SDG7102A, captured on a 2 GHz SDS6204.First a 4 ns wide pulse with ~1 ns edges.SDG7102A_Pulse_10MHz_4ns_RT1nsThe minimum pulse width for 1 ns transitions is 1.785 ns.SDG7102A_Pulse_10MHz_1785ps_RT1nsIn unspecified mode, we can get 1 ns pulse width and ~500 ps transitions.SDG7102A_Pulse_10MHz_1ns_RT500ps

author: egonotto
author_rank: Super Contributor
timestamp: March 03, 2022, 03:58:16 pm
content: Quote from: tautech on March 02, 2022, 10:44:13 pmHello,in SDG6000X the arbitrary waveform occupied memory in the small (<83 MB) intern memory.more than two 20 MS arbitrary waveforms have no room.Can you please try this in SDG7102A. And how large is the intern memory.Thanks.Best regardsegonottoPS.: Is it possible to get 48 Vpp output?

author: tautech
author_rank: Super Contributor
timestamp: March 03, 2022, 05:56:48 pm
content: Quote from: egonotto on March 03, 2022, 03:58:16 pmSpecified as 512MB.QuoteCurrently don't have access, maybe Performa01 can display it.

author: rf-loop
author_rank: Super Contributor
timestamp: March 03, 2022, 07:35:54 pm
content: Quote from: egonotto on March 03, 2022, 03:58:16 pmSimply answer afaik. No.It is also very clear told in data sheet.Single-ended- Page 13, (note also note about load and then different max depending frequency)- Page 4 (top of page image)- Page 1 (The24Vppanalog output issuperimposedwith± 12 Vdcoffsetto provide a maximum output range of ± 24 V (48 V).(note load)Differential (page 13)Amplitude flatness -0.3 +0.3 dB 100Ω load , 0.5 Vpp, compare to 1 MHz SineOutput 20 m 2 Vpp Differential peak to peak, 100 Ω differential load, common offset = 0 VOffset -1 +1 V Differential offset, 100 Ω differential loadCommon mode -1 +1 V Load = HiZ

author: 2N3055
author_rank: Super Contributor
timestamp: March 03, 2022, 07:56:51 pm
content: Quote from: egonotto on March 03, 2022, 03:58:16 pmThe 24 Vpp analog output is superimposed with ± 12 Vdcoffset to provide a maximum output range of ± 24 V (48V).P.S. I just saw RF was faster...P.P.S There is LAN mapping storage option. You can pull the files directly from network...

author: egonotto
author_rank: Super Contributor
timestamp: March 03, 2022, 08:20:51 pm
content: Quote from: tautechHello,the intern memory has to store the arbitrary waveform. One arbitrary waveform can need till 1 GB.I can not find info about the intern memory in the datasheet or in the User Manual.Best regardsegonotto

author: Performa01
author_rank: Super Contributor
timestamp: March 03, 2022, 10:16:22 pm
content: Internal Memory is about 3.5 GB.Max. amplitude is 24 Vpp, max. offset is +/- 12 V, both figures valid for High Z load.Attached screenshot demonstrates a 24 Vpp signal with -12 V offset from channel 1 of the SDG7102 into channel 1 of the SDS6204 and another 24 Vpp signal with +12 V offset from channel 2 of the SDG7102 into channel 2 of the SDS6204.

author: 2N3055
author_rank: Super Contributor
timestamp: March 04, 2022, 08:14:19 pm
content: Each channel has two outputs. Channels can function in single ended mode (when only + output is active) or diff mode (where output is differential between two BNCs).When in single ended mode it can swing signal of +/-12V (24V p-p) with +/-12V offset. So output amplifiers have dynamic range of 48V from -24 to +24V. That is in High-Z. With 50 Ohm load, half of all.But when set to differential mode each channel output is limited to 4V p-p with +/-2V common mode (High Z), and 2V p-p with +/-1V common mode (100Ohm diff load).What you see on that scope is that if you settwo different channelsto generate same waveform, set them tomaximum amplitude and invert channel 2 you can get 48V p-p between two different channels + outputs (with high Z load).

author: Performa01
author_rank: Super Contributor
timestamp: March 04, 2022, 08:19:43 pm
content: Quote from: tautech on March 04, 2022, 07:27:38 pmSorry, I'm not sure what you're trying to say. The screenshot you've copied from the data sheet pretty much shows what I've shown before - with the only difference that I chose to use different waveforms (sine and rectangle) to make it clear that these are independent signals.While these screenshots demonstrate the maximum output range of +/-24 V they do not show any signal exceeding 24 Vpp nor does the text next to that datasheet image say anything like that.We could construct a 48 Vpp differential signal by phase locking the two single ended output channels with 180° phase shift, see attached screenshot.Differential output mode of an individual channel is a whole different story and limited to 4 Vpp into High Z (2 Vpp into 100 ohms).EDIT: oh dear! this old piece of rugged silicon (2N3055) had the exact same thoughts - just a tad faster!

author: tautech
author_rank: Super Contributor
timestamp: March 04, 2022, 08:32:34 pm
content: OK so the screenshots nabbed of a single channel differential output inhttps://www.eevblog.com/forum/testgear/siglent-sdg7000a-350-500-mhz-and-1-ghz-awgs-coming/msg4040836/#msg4040836are correct then.Will remove earlier misleading post.

author: 2N3055
author_rank: Super Contributor
timestamp: March 04, 2022, 09:15:32 pm
content: Quote from: Performa01 on March 04, 2022, 08:19:43 pmI'm epitaxial version... Not so robust but a bit faster...

author: Plasmateur
author_rank: Regular Contributor
timestamp: March 13, 2022, 05:54:44 am
content: so....anyone hack the SDG7032A yet. Asking for a friend.

author: ResistorRob
author_rank: Regular Contributor
timestamp: May 02, 2022, 02:11:25 am
content: I didn't read the specs or any description. From the photo only I thought these might start at $2k to $3k. OMG 5 years ago I could never imagine a Siglent AWG costing $10 grand or more. lol

author: tv84
author_rank: Super Contributor
timestamp: May 02, 2022, 01:51:03 pm
content: Quote from: Plasmateur on March 13, 2022, 05:54:44 amTell your friend to buy one and then we'll check it out.

author: tautech
author_rank: Super Contributor
timestamp: April 17, 2023, 09:53:03 am
content: New firmware for SDG7000A models.Version： 1.1.1.29R884 MBhttps://int.siglent.com/upload_file/zip/firmware/Signal_generator/SDG7000A_V1.1.1.29R8_EN.zipRelease notes:Fixed the bug of pulse output error under specific configurationAdded amplitude sweep functionAdded the adjustment of channel skewSupported multi-file operation in the file managerOptimized the storage strategy of waveform data in sequence playback (The digital channel does not support sequence playback)The PRBS rate up to 625MbpsFixed the bug of abnormal signal output during waveform switching

author: Performa01
author_rank: Super Contributor
timestamp: September 22, 2023, 12:48:31 pm
content: Recently I got the idea to do some practical experiments to inspect the spectrum of a pulse train and to get a feeling how rise time and pulse width affect the bandwidth of the uniform level part of the spectrum. It was an obvious choice to use the pulse generator function in the SDG7102A for this. For all the following measurements, a pulse train with 10 kHz repetition rate has been used.First screenshot shows a train of 5 ns wide pulses with 1 ns rise/fall time. As we can see, the spectral line amplitude starts decreasing at about 50 MHz:SDS6204 Pro H12_FFT_Log_PR_10kHz_T1ns_W5nsSecond screenshot shows a train of 2 ns wide pulses with 1 ns rise/fall time. The spectral line amplitude stays nearly constant up to about 100 MHz:SDS6204 Pro H12_FFT_Log_PR_10kHz_T1ns_W2nsThird screenshot shows a train of 1 ns wide pulses with 500 ps rise/fall time. The spectral line amplitude stays nearly constant up to about 200 MHz:SDS6204 Pro H12_FFT_Log_PR_10kHz_T500ps_W1ns

author: Performa01
author_rank: Super Contributor
timestamp: October 05, 2023, 10:46:47 am
content: I have evaluated the “Wave Combine” feature in the SDG6052X and found that it is only useful at (very) low frequencies (Reply #460):https://www.eevblog.com/forum/testgear/siglent-sdg6000-series-awg_s/msg5093877/#msg5093877Knowing the challenges in an AWG and the particular history of the SDG6000X, I thought it would be interesting how the SDG7102A would perform in this regard. This is not just a big brother of the SDG2000X series (like the SDG6000X actually is), but a very ambitious design right from the start.For the SDG6052X, I have tested three different setups suitable for the full frequency range:1. Resistive power combiner with two attenuators in the source paths from the generators.2. Resistive power combiner with a single attenuator at its output.3. Internal “Wave Combine” function with external attenuator.The first setup tests the SA rather than the generator, so there’s no use to repeat it once again. That leaves the tests 2 and 3.The attenuators in this test are 20dB. The big advantage of this arrangement is that we need not touch the generator settings (except for frequency) and get the exact same output levels. As a consequence, the spectrum analyzer always sees the same signal levels of about -30 dBm, which is the standard test level for intermodulation distortion in most spectrum analyzers.I’ve tested 4 MHz and 400 MHz in order to get comparable results to the SDG6000X test, but have added a 900 MHz test to scratch the limits of the SDG7000A. As always, we expect the generator output buffer performance to degrade at higher frequencies. The 2nd tone is just 10 kHz above the first one. An automatic Intermodulation measurement has been used to get the results quickly and accurately.Let’s start with a single attenuator at the output of the power splitter. The isolation between the two generator outputs is only 6 dB, so any non-linearity will show up pretty clearly.Not a problem at 4 MHz:SDG7102A_Ext_1x20dB_4MHz_-4dBmStill not bad at 400 MHz (the SDG605X was at -58 dBc here, whereas the SDG7102A manages respectable -80 dBc.SDG7102A_Ext_1x20dB_400MHz_-4dBmEven at 900 MHz, the intermodulation distortion is very reasonable at -78 dBc.SDG7102A_Ext_1x20dB_900MHz_-4dBmNow let’s have a look at the internal wave combine function, 4 MHz at first:SDG7102A_Int_1x20dB_4MHz_-4dBmOnce again the distortion is already significantly higher than with the external splitter – and it is even worse than the SDG6052X: -80 dBc, yet this might be still good enough for many tasks.The truth gets revealed if we try to use the “Wave Combine” at high frequencies – first at 400 MHz. The result is not grat at -61 dBc, but certainly a lot better than the -38 dBc we got with the SDG 6052X.SDG7102A_Int_1x20dB_400MHz_-4dBmFinally the result for 900 MHz. At -57 dBc the distortion is still 19 dB better as the SDG6000X at just 400 MHz:SDG7102A_Int_1x20dB_900MHz_-4dBmVerdict:Even though the SDG7000A is significantly better than the SDG6000X, the internal “Wave Combine” feature is not really suitable for characterizing the distortion performance of highly linear test objects at higher frequencies.

author: gf
author_rank: Super Contributor
timestamp: October 07, 2023, 04:13:33 pm
content: Quote from: Performa01 on September 22, 2023, 12:48:31 pmI see that the measured pulse width and rise time in the third screenshot are more than 1ns/500ps.Is the third screenshot really the same pulse as here?https://www.eevblog.com/forum/testgear/siglent-sdg7000a-350-500-mhz-and-1-ghz-awgs-coming/?action=dlattach;attach=1428967;image[ The latter really measures approx. 1ns/500ps pulse width and rise time. ]EDIT: Since this is the 1GHz model, I wonder if it is really impossible to generate a pulse train with a reasonably flat comb envelope is in the frequency domain up to 500...1000MHz?If this is just a limitation of the pulse mode, would it possibly work in AWG or even AFG (DDS) mode?The idea would be to transmit a [ 1 0 0 ... 0 ] waveform via AWG or AFG, choosing a waveform memory size and repetition rate so that the waveform memory contents can be sent 1:1 to the DAC at 2.5 GSa/s, without phase truncation or resampling. Ideally, after perfect reconstruction, this should result in a sinc pulse train having a comb spectrum with a flat envelope from 0...1.25GHz, and zero above 1.25GHz. In practice, I'd expect the envelope to reflect the frequency response of the generator's reconstruction filter, which will hopefully be fairly flat up to 1GHz (since this is the 1GHz model), and then roll off steeply. But who knows...Btw, is my assumption correct that the "true" sample rate of the SDG7000 is only 2.5 GSa/s, while 5GSa/s is merely the oversampling rate of the DAC?

author: Performa01
author_rank: Super Contributor
timestamp: October 08, 2023, 10:57:33 am
content: Quote from: gf on October 07, 2023, 04:13:33 pmHave you compared the conditions?The reference measurement you're referring to was a 600 mVpp pulse measured at 2 ns/div using 10 GSa/s (ESR).The pulse train in my last post was 3 Vpp and has been captured at 200 µs/div using 5 GSa/s.Siglent scopes have deep measurements, so we get numbers that are reasonably close to the truth even at slow time bases, but of course resolution and also accuracy are finally limited by the sample rate. Only at very short time bases, like 10 ns/div and below (without ESR) and 5 ns/div and below (with ESR), additional interpolation is used to increase time resolution.But the most important reason is the limited slew rate of the generator output. It can deliver a clean sine wave up to 1 GHz at 3 Vpp amplitude max., but it cannot deliver 500 ps risetime pulses at that amplitude level. This was an oversight on my part and so I’ve repeated the old measurement with comparable parameters and got quite similar results, see first screenshot.SDS6204_Pulse_1MHz_W1ns_RT500psQuote from: gf on October 07, 2023, 04:13:33 pmIt’s the slew rate limit of the output amplifiers. 500 ps rise time is certainly a bit of a challenge for a linear power amplifier, don’t you think?Quote from: gf on October 07, 2023, 04:13:33 pmI’m not the designer of that generator, but as far as I can tell, it has 2.5 GSa/s for the arbitrary waveforms and this is most likely the true sample rate, whereas the 5 GSa/s probably are some interpolation within the DAC.Anyway, I’ve repeated the pulse train experiment at 1 MHz repetition rate and low 600 mVpp amplitude and it actually yields better results, see 2nd screenshot.SDS6204_Train_1MHz_W1ns_RT500psWe still don’t get 612.5 MHz, but -3 dB at 378 MHz is still significantly better than the first attempt at 3 Vpp amplitude.

author: mawyatt
author_rank: Super Contributor
timestamp: October 08, 2023, 06:56:05 pm
content: We were quite interested in this new high end AWG, and were scheduled to have it for awhile to demo. Siglent NA kindly offered to allow us to evaluate, and our plan was looking into the NPR (Noise Power Ratio) at various frequencies up to 1GHz.When we found out the price, we couldn't afford this and notified Siglent we were not able to acquire and didn't want to take time away from potential other customers.Would be appreciative of someone looking into the NPR at various frequencies, and 1GHz if possible. NPR has a long history with us, culminating in evaluation of a very high performance DACs awhile back.Will discuss further if folks are interested.Edit: BTW does anyone know what DACs Siglent is utilizing, and what type amps in the output channels?Best,

author: gf
author_rank: Super Contributor
timestamp: October 09, 2023, 09:20:54 am
content: Quote from: Performa01 on October 08, 2023, 10:57:33 amSure, it's challenging, and obviously reducing the amplitude did help.But how can it reproduce a 1GHz sine wave at 3Vpp if it cannot reproduce this pulse at 3Vpp?Don't underestimate the slew rate required for a 1GHz sine wave either, it's 9.42 kV/µs at 3Vpp! And its 10-90% rise time is 295ps.The maximum dV/dt of a 1GHz sine wave is IMO almost 2x higher than the maximum dV/dt of this pulse, if both have the same Vpp.So regarding dV/dt, the 1GHz sine wave is the bigger challenge.QuoteLooks very plausible nowThe "flat region" in the spectrum is of course still limited by the smallest pulse width and rise time you can set. A rectangular pulse with 1ns width has a sinc-shaped spectrum (with its first zero at 1GHz, which we can clearly see in your FFT plot), and the edge softening does some additional low pass filtering. While this is obviously the limit achievable in pulse mode, my guess is still that the generator per se can likely produce even narrower pulses in AWG or DDS mode (leading to an even wider flat region of the comb).

author: Performa01
author_rank: Super Contributor
timestamp: October 09, 2023, 04:49:56 pm
content: Quote from: mawyatt on October 08, 2023, 06:56:05 pmI would be glad to help out if time and circumstances permit, but I'm not sure what you want and how it should be done.What do you want to check? Since there is no explicit DUT, is it the linearity of the output stage? Is the dual tone test with internal (numeric) combiner not indicative enough for that?

author: Performa01
author_rank: Super Contributor
timestamp: October 09, 2023, 06:00:24 pm
content: Quote from: gf on October 09, 2023, 09:20:54 amYou are right of course that the 1 GHz sine wave has a faster “rise time” and that it requires an even higher slew rate than a perfect pulse with equivalent rise time on top of that. And the generator manages this quite well, as can be seen in the first screenshot.SDS6204_Sine_10MHz_W1ns_RT500ps_3VIronically, we get a “pulse width” of less than 500 ps and “transition times” of <350 ps. So your thoughts are perfectly valid: why can’t we get a 1ns wide pulse with 500 ps at full amplitude?I only can remind you that we are moving on unspecified territory here. The minimum specified rise time is 1 ns. The SDG7102A can do rise times down to 500 ps, but nothing is guaranteed in this region. This seems to indicate that we are indeed moving at the edge of technical feasibility and I’m inclined to believe that Siglent engineers would have been happy to make this instrument even more powerful and impressive – but they had to stick with the limits of practical implementations.By the way, we need not go as low as 600 mVpp to get closer to the 500 ps rise time. I’ve done a couple of measurements on 2 ns wide pulses with 500 ps rise time at 1 MHz to illustrate this.At 3 V amplitude, the pulse is rather ugly – just look at the undershoot at the end of the falling edge:SDS6204_Pulse_1MHz_W2ns_RT500ps_3VBut at 2.9 V, an internal relay clicks and we already get a completely different picture:SDS6204_Pulse_1MHz_W2ns_RT500ps_2.9VRise time is close to 500 ps again and it seems to be just an unlucky circumstance thatThe full 3V cannot be delivered without deactivating that particular attenuator stage.

author: mawyatt
author_rank: Super Contributor
timestamp: October 09, 2023, 06:38:43 pm
content: Quote from: Performa01 on October 09, 2023, 04:49:56 pmThe NPR test is one of the more demanded linearity tests, since it fills the entire bandwidth under consideration with an equal power density waveform. Consider that the BW is occupied by multiple frequency channels and one selective channel has no energy within. This creates a somewhat like "notch" in the otherwise uniform density across the band spectrum of channels.Not sure if Siglent has access to a NPR creating routine, or builtin type waveform. A waveform covering say 10MHz to 1GHz with 100 or more channels per decade and one channel (or more) without any signal within.With the channels full to the "brim", say to -40dBm or higher if they can be generated, then the one channel without any signal will show a lower level where the other channels "spill" into the "well". The NPR is the "well" signal level minus the "brim" level in dBm.Of course this needs to be viewed on a very high quality SA if these results are good, so the SA doesn't distort the final resulting spectral display.Long ago in early 80 we needed to create such a NPR test for the RT SA we were developing based upon the CZT. At that time very expensive specialized instruments created the NPR signal by creating a broadband noise signal, frequency converting to the band where custom high performance band reject crystal filters were located, then frequency converted to the band of interest. The band reject crystal filters would "notch" out the desired signal and produce the NPR for use as a input test signal.Due to cost constraints, we developed an alternative method of generating the NPR signal. Very simplified we supplied a high speed and resolution DAC with a time domain file created by an IFT which displayed the desired NPR frequency domain waveform with the selective "notch", this produced a frequency band and resolution based upon the DAC sample rate and memory depth (overall cycle time). The DAC output was either used directly, bi-phase modulated, or frequency scaled to the desired frequency band of interest. This worked beautifully and allowed us to evaluate our RT SA way back with a NPR parameter.So our plan if we were able get ahold of this new AWG, was to search for any NPR files available from anywhere (hoping Siglent already had such), then loading the files for the SDG7000 and take a quick look with our modest SSA3021X+, then begin looking for an acceptable SA (maybe a higher end Siglent SA) to evaluate the SDG7000. The overall goal was to acquire the SDG7000 knowing the NPR performance (couldn't afford a new SA at that time), and proceed forward on a specialized project. With the cost of the AWG, then later the SA, this placed the concept out of reach at that time.Our interest in the DAC utilized (and channel components) was in reference to some work done awhile back where we were involved with a new ultra-high performance dual DAC called Griffin from KS in SiGe BiCMOS, earlier renditions of this DAC became benchmarks for HS and HR DAC performance. Our interest was in use with EW applications.Anyway, taken up enough of your time and space here, as a much longer story and such if interested.Best,

author: gf
author_rank: Super Contributor
timestamp: October 09, 2023, 06:57:43 pm
content: Quote from: Performa01 on October 09, 2023, 06:00:24 pmAaaahhh!

author: 2N3055
author_rank: Super Contributor
timestamp: October 09, 2023, 07:51:06 pm
content: Quote from: mawyatt on October 09, 2023, 06:38:43 pmMike,NPR test strictly calls for using noise.Would multi tone test (with a gap) with sufficient density of frequencies generated be sufficient approximation or a strict noise spectrum would be needed for whole bandwidth in question, excluding "quiet" channel ??Regards,Siniša

author: mawyatt
author_rank: Super Contributor
timestamp: October 09, 2023, 08:10:42 pm
content: Quote from: 2N3055 on October 09, 2023, 07:51:06 pmGood question, not sure.Our experience has been with all channels except a few filled to brim with signal across the channel space.Originally technique was from a proper broadband noise source with notched out channels, this was the specialized dedicated NPR equipement. This equipement was designed around the old telephone channel requirements with 4KHz channels stacked against each other in long frequency chains. However, we did this with a DAC, actually a pair of advanced ECL driven high resolution and speed ADI hybrids, and a bunch of static ECL memory.When we were shown the Griffin DAC back around 2009, the NPR file was already created and "looked" like a noise source with filtered channel, so no details there.Best,

author: 2N3055
author_rank: Super Contributor
timestamp: October 09, 2023, 08:21:13 pm
content: Quote from: mawyatt on October 09, 2023, 08:10:42 pmI'm not sure either, that is why I'm asking. My speculation here is that if we created dense enough multitone with random phase for the tones it could be "good enough" approximation, at least for order of magnitude type of measurement.Not an expert though(not even close to that), would need to investigate to see it that supposition of mine is correct...Take care.

author: Njk
author_rank: Frequent Contributor
timestamp: October 09, 2023, 10:19:13 pm
content: BTW if one is interested in measuring the linearity, I think it can be done through measurement of sub-carrier isolation in a test OFDM-like signal (using a criteria like BER, etc). Perhaps it'll be more simple to tweak the existing codec SW than to invent something unique.https://en.wikipedia.org/wiki/Orthogonal_frequency-division_multiplexing

author: gf
author_rank: Super Contributor
timestamp: October 10, 2023, 09:33:39 am
content: Quote from: mawyatt on October 09, 2023, 08:10:42 pmI guess it shouldn't be that difficult to create such an arbitary waveform pattern oneself, e.g. in Matlab or Octave?Create Gaussian noise, FFT, notch out positive and negative frequencies of the desired channel, IFFT.I found this paper from Analog Devices on the NPR topic:https://www.analog.com/media/en/training-seminars/tutorials/MT-005.pdfSDG7000A has 14-bit vertical resolution, and according to figures 2 and 4, even an ideal 14-bit system is limited to a maximum of 74dB NPR, and this maximum can only be achieved when the noise has theoptimal levelwith respect to the ADC's full scale range. Any smaller or larger level reduces the achievable NPR.So the important question is, how well the utilization of the full-scale range of the AWG's ADC can be controlled. Is the output amplifier gain adjusted (almost) continuously with a VGA? Or is its gain only adjustable in larger steps, while the fine adjustement is done digitally, by amplitude scaling of the waveform? The latter would of course reduce NPR, even if the waveform was created with optimal noise level.Any distortion and amplifier noise reduces NPR additionally, of course.Quote from: 2N3055 on October 09, 2023, 08:21:13 pmYou need of course enough frequency points falling into the notch. The above mentioned paper asks for "at least 25 to 50 samples within the filter notch". 512M samples enable a resolution of 4.66 Hz at 2.5 GSa/s. I think that's not badIFFT of a spectrum with flat amplitude and random phase leads to a bell-shaped PDF in the time domain, too. I'm not sure if it Gaussian, but it looks similar. And after quantization in the time domain and FFT, the amplitude is again "noisy" in the frequency domain, and no longer flat. So I would directly use Gaussian noise in the time domain, as it should be.

author: gf
author_rank: Super Contributor
timestamp: October 10, 2023, 09:54:34 am
content: Quote from: gf on October 09, 2023, 06:57:43 pmSeriously, I guess they leave a few percent headroom for possible overshoot from the DAC's 2.5 -> 5 GSa/s upsampling filter. The output of this filter still needs to fit within the full-scale range.

author: Performa01
author_rank: Super Contributor
timestamp: October 10, 2023, 04:13:51 pm
content: Quote from: mawyatt on October 09, 2023, 06:38:43 pmI don’t think so, but you can have a look yourself. The inbuilt arbitrary waveforms are almost exactly the same as in an SDG6000X (and presumably SDG2000X).In general, when you find a way to perform this test with your SDG6000X, I can certainly repeat it with the SDG7102A.You seem to be interested not only in the linearity of the output (buffer) stage, but also the DAC itself. In this regard, the SDG6000X should be even better, as it is 16 bits as opposed to the 14 bits of the SDG7000A. On the other hand, we have seen that its output stage is a little on the weak side…Quote from: mawyatt on October 09, 2023, 06:38:43 pmThis begs the question, what NPR ratio do you expect to see, or in other words, what NPR do you need for your tests?The SDG7102A can deliver up to +13.5 dBm at 1 GHz. If we use noise instead of sine waves, then the total output signal has to be limited to 160 mVrms for a reasonably flat spectrum up to 1 GHz, see first screenshot:SDS6204 Pro H12_Noise_1GHz_160mVWe get a similarly steep transition from passband to stopband if we limit the bandwidth to e.g. 100 MHz:SDS6204 Pro H12_Noise_100MHz_334mVAs to be expected, the measurement statistics for the 1 GHz noise spectrum shows exceptional high variations. Of course, this would have been even more impressive if I had the statistics left running overnight…The noise floor of this measurement is about -105 dBV, this would limit the measurable NPR to about 36 dB – even if we were able to apply a notch in the noise spectrum. With a “real” SA (one that is definitely lower noise than the SSA3021X), the situation is rather worse. So I guess this test is not well suited for wideband systems. Not only do we need the notch function, but we also have to apply a lower frequency limit, so to define a relatively narrow band (e.g. GSM band) where the measurement can deliver useful results.Especially the oscilloscope demonstrates the problem very clearly, because other than the usual SA, its input sensitivity and full scale voltage is totally transparent and very well controllable, with low noise – at least for frequencies above some 10 MHz. Even though the noise signal level was just 160 mVrms, I had to use the 500 mV/div vertical gain setting to avoid overrange. Consequently, the noise floor cannot be better than around -105dBV. A higher generator level cannot solve this, because it requires a lower input sensitivity, hence also higher noise floor. The only way to get a better S/N ratio than the ~36 dB demonstrated above would be to reduce the bandwidth. I would think, half the bandwidth should result in 3 dB better S/N, because the signal levels can go up by 3 dB. For a total of 72 dB S/N, we’d need to halve the bandwidth 12 times, which would be about ~250 kHz. Not very useful unfortunately...EDIT: corrected the expcted process gain to 3 dB.

author: gf
author_rank: Super Contributor
timestamp: October 11, 2023, 08:28:37 am
content: QuoteUnfortunately, processing gain is only 10 dB per decade, or 3dB per octave of BW reduction, i.e. in order to improve the scope's NPR by 36 dB (from 36 to 72), you need to reduce the bandwidth of the noise signal by a factor of 10^(36/10), or approx. 3981. 1GHZ/3981 is only ~251kHz.

author: Performa01
author_rank: Super Contributor
timestamp: October 11, 2023, 09:54:11 am
content: Quote from: gf on October 11, 2023, 08:28:37 amUnfortunately you are right. Somehow I wanted to gain the 3 dB at both ends – noise floor and signal level, but this is not going to happen. Limiting the noise signal to 500 MHz bandwidth yields close to 39 dB SNR, see attached screenshot.SDS6204 Pro H12_Noise_500MHz_160mVThe rather low SNR is not a coincidence. While the noise floor is always distributed over the full bandwidth, the usual signals consist of just a few individual frequencies on which the total signal energy is concentrated. Yet in this scenario, where the signal itself is white noise, the signal energy is spread over the full bandwidth as well, which leaves little energy per frequency bin.If we reduce the signal bandwidth to one half, then the noise signal density can be increased by 3 dB per frequency bin in order to get the same total signal energy (the one that doesn't overdrive the acquisition system). The noise floor remains the same, of course.

author: mawyatt
author_rank: Super Contributor
timestamp: October 11, 2023, 01:07:36 pm
content: @ gf,Walt's paper is a good reference wrt NPR, thanks for referencing suchBTW we've seen over 74dB a decade ago, and progress was slated to exceed 80 with future generation systems. We had achieved ~66dB back in early 80s with our RT SA based CZT as DUT, and this was the result of the CZT RT SA and our custom AWG producing the NPR waveform, so sort of a RRS result.@ Performa01We wanted to resurrect an old concept from ~2009 which involves eliminating/reducing electronic fratricide (self jamming) for co-located jamming and communication systems, especially where the comm systems are operating within the jamming environment, but that's about all we can say. We don't have any specific requirements, but wanted to see how well the new 7000 behaves wrt NPR. The 6000 isn't an option since we need to go beyond 500MHz, altho we could apply Bi-Phase modulation, or look into Super Nyquist techniques to extend the upper frequency range.The idea was to demonstrate the basic concept with OTS equipment with minimum additional custom hardware, then proceed with a custom chip development. If funding ever materializes, then we can more seriously revisit this concept and project.Best,BTW none of the images after #53 are displaying? Anyone else have this issue? Edit, now they are showing???

author: Performa01
author_rank: Super Contributor
timestamp: October 11, 2023, 05:59:55 pm
content: Here’s yet another example, this time for just 1 MHz noise bandwidth. The SNR doesn’t quite reach the expected 66 dB, but not far off either.SDS6204 Pro H12_Noise_1MHz_160mVI’ve tried to optimize my 1 GHz test results by avoiding any attenuator in the input path and adapting the noise signal level to better utilize the ADCs dynamic range.At 500 mV/div, there is already the first 20 dB attenuator stage active, so I stick to the lowest sensitivity (highest V/div) where no attenuator is needed, i.e. 100 mV/div. For this, the optimum noise signal level for a 1 GHz wide noise spectrum is 50 mVrms, which in turn results in a maximum voltage of 700 mVpp.SDS6204 Pro H12_Noise_1GHz_50mVWe achieve a SNR of 40.47 dB after all. Now let’s analyze that:The signal level cannot be much higher, because the maximum Vpp value in the statistics is already pretty close to the full screen voltage of 800 mVpp.The noise floor can be said to be -120.8 dBV pretty accurately (we also get very similar readings without any input signal).The RBW of this measurement is 4.45 kHz. The noise floor of -120.8 dBV equals 912 nV. This results in a noise density of 13.67 nV/√Hz. This is of course much higher than what would be achievable at higher sensitivities, like 10 mV/div and below, but it is still not too bad.In order to achieve 66 dB SNR, we’d need the noise floor to be at least 25.5 dB lower. This means just 48 nV, resulting in a noise density of 0.72 nV/√Hz. At the same time the instrument is supposed to deal with a 700 mVpp wideband signal without intermodulation or – even worse – compression.Instead of noise density, we could calculate the required (3rd order) dynamic range. The total input signal is 50 mVrms. We just assume that the first mixer of the SA can handle the high crest factor, i.e. the 700 mVpp, I have serious doubts though.Divided by 48 nV this is 1041666 or 120 dB. Well, the very best (with regard to dynamic range) spectrum analyzers that I’m aware of, like the R&S FSEA30, can reach 115 dB. As usual, this requires the instrument to be operated at a certain sweet spot, 115 dB aren’t quite 120 and I’m doubtful if this exceptional high dynamic range still applies to wideband noise signals with high crest factor, but then again, I have no means to try it out.

author: gf
author_rank: Super Contributor
timestamp: October 11, 2023, 08:16:32 pm
content: Quote from: Performa01 on October 11, 2023, 05:59:55 pmAccording to figure 4 in the paper, the optimum Gaussian noise signal level for an 8-bit ADC with a full scale range of 800mVppis 800/2/3.92 or ~102mVRMS. The optimum is a trade-off between clipping and quantization noise. They do accept some clipping in favor of lower quantization noise. Note that on average only one out of ~11000 samples from a Gaussian PDF exceeds +/- 3.92 sigma, i.e. only a small fraction of the samples is really clipped. If the theory from the paper also works in practice, then doubling the level from 50mV to 100mV should give you an extra 6 dB.

author: Performa01
author_rank: Super Contributor
timestamp: October 12, 2023, 07:46:12 am
content: Quote from: gf on October 11, 2023, 08:16:32 pmWell, I’ve tried that and it didn’t work out in practice.SDS6204 Pro H12_Noise_1GHz_100mVYes, we gain some signal level, but only 5 dB on average instead of six, simply because of the signal loss due to clipping. All amplitude measurements show overload (e.g. >963.529 mVpp). The visible range is 800 mVpp and these measurements indicate that we’re actually using up the full ADC range – and beyond, which of course cannot be measured anymore.The noise floor on the other hand has risen by about 2.5 dB because of the ADC overloading. All in all we get barely 3 dB improvement on the SNR – the marker list shows now 44.5 dB, which would be 4 dB more, but this is only because the level at 200 kHz happens to have improved by 6.5 dB, which is an outlier within the whole picture.Your proposal was for an 8 bit ADC, whereas we have 12 bits here, yet the ill effects shown here have certainly nothing to do with ADC resolution or quantization noise. If we look at the signal in the time domain, we can also see that it is quite saturated.

author: gf
author_rank: Super Contributor
timestamp: October 13, 2023, 07:25:49 am
content: Quote from: Performa01 on October 12, 2023, 07:46:12 amSorry, I missed that. Then your noise profile is certainly dominated by other sources while quantization plays just a minor role. I was wondering anyway that you got >40dB. I had not expected so much with 8 bits, 50mVRMS@500mV/div and 1GHz BW @5GSa/s.QuoteThanks for trying. The predicted +6dB have not materialized as your noise profile is different from the assumptions in the paper, but the NPR still did improve! If you vary the noise signal level, you should still be able to find a point where the NPR is at its maximum (so that any lower or higher level results in a lower NPR).QuoteHmm, if the noise signal is Gaussian, then clipping at +-4 sigma should not result in a 1dB loss of RMS level, but the expected order of magnitude is rather 0.001dB, i.e. virtually negligible. Either the PDF is not Gaussian, or something else strange is going on.

author: mawyatt
author_rank: Super Contributor
timestamp: October 13, 2023, 02:45:04 pm
content: Quote from: Performa01 on October 11, 2023, 05:59:55 pmThe R&S maybe the best available SA wrt to dynamic at 115dB (haven't looked), maybe for general purpose commercial use. Way back in 2009 when we witnessed the Griffin DAC (recall better than 76dB NPR then), KS pulled out an experiment SA to demonstrate this level of NPR (their standard high end SA wasn't good enough as we saw), don't know if this ever became a general purpose commercial product tho.There are specialized types of spectrum measurement devices, SA like if you will, that far exceed 120dB Dynamic Range. One might consider these as more like specialized wide-band tunable receivers than SA, but they still cover a relatively large frequency range while processing narrow band signals in the presence of extremely high interference (mostly as in adversarial jamming) over a relatively wide-bandwidth.Our interest in the NPR measurement was related to allowing communication within our own intentional jamming signals as well as observing any "other" signals of interest (much more involved but not open for discussion). The core DAC NPR performance starts the whole process of signal generation and gets "enhanced" by additional post processing and frequency translation, however the DAC is not a simple straight forward n-bit DAC but has dynamic error correction and predistortion.Thus our interest is in how good the new AWG performs and the DAC and signal chain utilized.Best

author: tautech
author_rank: Super Contributor
timestamp: November 25, 2023, 09:22:53 am
content: New firmware for SDG7000A models.Version： V1.1.1.3185 MBhttps://int.siglent.com/upload_file/zip/firmware/Signal_generator/SDG7000A_V1.1.1.31_EN.rarRelease notes.Support frequency hopping functionBuilt in EasyWaveX supports multi pulse functionAdd the function of erasing user waveform files with one clickSolve the problem of system unresponsiveness when loading incorrect IQ waveform filesSolve the problem of occasional loss of locking when using OCXOSolve the problem of loading network disk waveform files getting stuckFixed the bug of false alarms for overvoltage

author: Performa01
author_rank: Super Contributor
timestamp: February 06, 2024, 11:31:58 am
content: Time ResolutionInspired by the application presented in this thread:https://www.eevblog.com/forum/testgear/keysightagilent-81160a-highest-time-resolution/I thought I’ll check this with the SDG7102A. To cut a long story short, I was able to enter at least 12 relevant digits for the pulse period, e.g. 123456789.123 ns, which is equivalent to 123 milliseconds at one picosecond resolution. Well, there’s the question: is this still accurate?If we are satisfied with a time interval of 123 µs and a time resolution of just 10 ps, then an SDS6204 H12 Pro oscilloscope is good enough to check the accuracy of the generator.For this test, I’ve fed channel 4 with a 2 ns wide 600 mVpp pulse with 500 ps rise time, at a pulse period of exactly 123456,78 ns:SDS6204_Pro_H12_Pulse_W2ns_RT500ps_P123456780ps_Zoom_RunAs can be seen, period measurement is off by just 3.4 picoseconds – I’d think that the main portion of this error can be attributed to the DSO.Pulse width is spot-on and transition times are pretty close, even though the measurements use the data from the main window. The zoom window shows the pulse in detail. There is a little variation in the pulse shape; this is because of the fast 500 ps rise time whereas this generator is only specified down to 1 ns.

author: huverson
author_rank: Newbie
timestamp: March 26, 2024, 08:39:17 pm
content: Yippie, welcome youngest member to the labSo I obviously haven´t been long time here on this forum and neither especially active - but - I have already been helped quite some and if I can give something back by for example some tests with the new device just get in contact!BestMartin

author: Neoname
author_rank: Contributor
timestamp: July 01, 2024, 01:06:52 pm
content: I'm really interested in the SDG7000A series if it lives up to its spec sheet, it seems like it ticks an enormous amount of boxes! However, even the base model 350MHz SDG7032A without the optional OCXO is really stretching my budget to its absolute edge.I've never purchased any Siglent gear before, and I've honestly tried putting time into reading other commentary here on what is normally done to "liberate" Siglent equipment but I have to confess that I can barely understand any of it, and I can find no references to the SDG7000A series at all so I can't even understand which discussions would be relevant.Does anyone know if it is possible to "liberate" the SDG7000A series, and if so, is there a clear baby-steps guide for the particular method that would work? Thanks for any help!

author: Detlev
author_rank: Regular Contributor
timestamp: November 19, 2024, 07:37:18 pm
content: Hello SDG7000 community,does anyone have experience with improving the SDG7000 with the following scripthttps://www.eevblog.com/forum/testgear/siglent-sds-sdg-hack-script/and / or can the SDG7000 also be improved? If so, the 7000 would be quite interesting.Best regards

author: tautech
author_rank: Super Contributor
timestamp: January 20, 2025, 10:00:54 pm
content: 2 firmware updates for SDG7000A models not previously mentioned in this thread....Version： V1.1.1.32R3 from June 24 and Version： V1.1.1.33R1 released earlier this month.One needs only install the latest version to get the improvements from the previous version.Version： V1.1.1.33R185 MBhttps://int.siglent.com/upload_file/zip/firmware/Signal_generator/SDG7000A_1.1.1.33R1_EN.zipRelease notes1.PRBS supports programmable polynomial2.Digital channel supports burst mode3.Added support for 5GNR, LTE_FDD, LTE_TDD, 802.11.AX, 802.11.BE protocol waveform playback4.Solved the problem that the time base calibration DAC code sometimes cannot be savedEarlier V1.1.1.32R3Support the waveform playback generated by SigIQPro;The maximum number of burst cycles up to 10^13;Solve the problem of output error when the length of first waveform in sequence is greater than 30M points.Solve the problem of output error when the frequency is greater than 500MHz in sweep mode.