Siglent SVA1015X and SVA1032X 1.5, 3.2GHz Spectrum & Vector Network Analyzers  - Page 1
Forum section: electronics / testgear

author: rf-loop
author_rank: Super Contributor
timestamp: March 09, 2018, 09:34:41 am
content: Siglent is launching new equipmentEMC Live 2018Wednesday, April 25, 2018Product Demo – 1:05 – 1:20 pm ET"The new SIGLENT SVA1015X helps minimize test time by combining a swept superheterodyne spectrum analyzerwith a two port VNA.The available Distance to Fault, EMI,and complex impedance measurement options...""...improved UI with new touch screen, mouse, and keyboard support."

author: rf-loop
author_rank: Super Contributor
timestamp: March 09, 2018, 09:36:28 am
content: Estimated release May 2018Estimated price around 1500$Spectrum 9kHz - 1.5GHz and with TGDANL -160dBm/HzStandard including preamplifierVector Network AnalyzerCable TestAntenna TestDisplay 10.1" 1024x600 capacitive touch panel.Support also ext Keyboard and MouseAnd more.... soon.

author: rf-loop
author_rank: Super Contributor
timestamp: March 09, 2018, 09:37:36 am
content: reserved (SVA1032X bit better level accuracy and tiny bit better min. DANL)

author: Dubbie
author_rank: Unknown
timestamp: March 09, 2018, 09:50:04 am
content: 1.5Ghz seems rather low for a VNA these days.Is there a 3.2 and or 6Ghz version as well?

author: Neganur
author_rank: Unknown
timestamp: March 09, 2018, 12:20:35 pm
content: 3 and 6Ghz are probably not in the price segment they’re aiming this thing at. And there are tons of antennas in subgiga to use this one for I guess.Why that picture is blurred except for the brand name though heh....not like you can see the specs by just looking at it. (Seems the picture was posted on Twitter, withou blurr)

author: borjam
author_rank: Unknown
timestamp: March 09, 2018, 12:24:54 pm
content: Now this is interesting!I was wondering how long it would take.As a miniVNA Tiny user I am really curious. I know it has lots of limitations, but the price is unbeatable so far.Although I imagine the price of this thing will be in the €/$1000 - €/$2000...

author: PA0PBZ
author_rank: Super Contributor
timestamp: March 09, 2018, 12:46:56 pm
content: Quote from: Neganur on March 09, 2018, 12:20:35 pmThere:

author: sequoia
author_rank: Unknown
timestamp: March 09, 2018, 06:44:12 pm
content: I guess market for lower end VNAs is not very big? If something like this would be priced so that its attractive to "average" Amateur Radio hobbyist, Siglent probably would sell orders of magnitude more....

author: simone.pignatti
author_rank: Frequent Contributor
timestamp: March 09, 2018, 06:47:09 pm
content: HEY those images are from our twitter account! Where is the credit!I took them at Embedded World 2018 in Nuremberg (DE)https://twitter.com/BatterFlySrl/status/969967096951132160https://twitter.com/BatterFlySrl/status/968819477646381057

author: MadTux
author_rank: Frequent Contributor
timestamp: March 09, 2018, 07:01:13 pm
content: Well, price-wise, these are cerainly not for me, but maybe HP-8753s are getting cheaper, then

author: borjam
author_rank: Unknown
timestamp: March 09, 2018, 07:33:37 pm
content: Quote from: sequoia on March 09, 2018, 06:44:12 pmFor the typical antenna adjustments the cheap VNAs are enough. I have a miniVNA Tiny and it works really well. If you are doing finer stuff like filters it’s a different matter of course.What will be its dynamic range?

author: simone.pignatti
author_rank: Frequent Contributor
timestamp: March 09, 2018, 07:57:30 pm
content: I would say similar to SSA3000Xbtw the SVA has a 10.1" touch screen display

author: PA4TIM
author_rank: Super Contributor
timestamp: March 09, 2018, 08:16:32 pm
content: Wow, it looks very modern for a thing made in 1970 , or is it a bug in the firmware

author: rf-loop
author_rank: Super Contributor
timestamp: March 09, 2018, 09:57:32 pm
content: Quote from: PA4TIM on March 09, 2018, 08:16:32 pm1.1.1970 is UNIX "epoch time" - (and its little cousin linusnix).We also remember this old method for modify SSA3000X using this "epoch time" trick.

author: hendorog
author_rank: Super Contributor
timestamp: March 09, 2018, 11:53:56 pm
content: Looking at the port labels I am guessing that it will need an external coupler for S11 measurements...?

author: TheSteve
author_rank: Unknown
timestamp: March 09, 2018, 11:58:13 pm
content: Quote from: hendorog on March 09, 2018, 11:53:56 pmOuch, hopefully the labeling is just incorrect, otherwise it is awful lame and better be crazy cheap. Pretty hard to call it a two port analyzer.

author: Bud
author_rank: Super Contributor
timestamp: March 10, 2018, 12:01:28 am
content: Quote from: hendorog on March 09, 2018, 11:53:56 pmApparently the Chinese know a way to do it without one. But my bet is they have no idea how to do it at all.

author: hendorog
author_rank: Super Contributor
timestamp: March 10, 2018, 12:15:34 am
content: Quote from: Bud on March 10, 2018, 12:01:28 amQuote from: TheSteve on March 09, 2018, 11:58:13 pmActually it isn't really a bad decision for a combo device, as you can buy what you need. Also they already have a coupler for the SA range.But _if_ it is the case there will be quite a bit of port swapping needed.

author: orin
author_rank: Frequent Contributor
timestamp: March 10, 2018, 01:11:30 am
content: Quote from: Bud on March 10, 2018, 12:01:28 amYou don't need a system that uses an external coupler to measure S11. The DG8SAQ VNWA is a two port vector network analyzer that will measure S11 up to 1.3GHz and it uses a resistive bridge internally.The difficult part is the phase of S11 (or indeed of any S-parameter they are measuring) - how do they compare the phase of the reflected signal with that of their source signal?

author: hendorog
author_rank: Super Contributor
timestamp: March 10, 2018, 01:30:12 am
content: Quote from: orin on March 10, 2018, 01:11:30 amYes, I meant coupler or bridge.It can also be done with a circulator or even a splitter. Circulators are normally not wide band, but there is a older solid state design that Charles Wenzel has published for low frequencies and low power. It would be interesting to see how high in frequency that could operate using the fastest op-amps available now.The phase comparison part is not difficult. Internally there would be a second, reference, detector which is fed with a portion of the TG signal. The detectors are just mixers and ADC's. The some maths in the FPGA and bobs your uncle.

author: KE5FX
author_rank: Super Contributor
timestamp: March 10, 2018, 02:01:15 am
content: It probably has only two receiver channels internally instead of three or four. They may have a single directional coupler (more likely a resistive bridge) on the main port to support S11 measurements, and a conventional non-directional ALC sampler on the TG port. S21 measurements would be scalar only, implemented by treating the tracking generator output as a transmit-only "port 2."Not necessarily a bad way to go, at the right price. But it limits your calibration options. It had better be cheap... very cheap.

author: Neganur
author_rank: Unknown
timestamp: March 10, 2018, 03:44:45 pm
content: You don't need 4 or two receivers to measure S21 - one is enough, and also phase can easily be measured with just one receiver if you compare the received phase to the phase at the TG output.Implement a switching matrix (e.g. four RF SPDT switches) to change the DUT direction and then just have another switch path to select for reflection and transmission + the math.Very crude compared to modern stuff but sure it works.

author: nctnico
author_rank: Super Contributor
timestamp: March 10, 2018, 03:58:04 pm
content: Quote from: Neganur on March 10, 2018, 03:44:45 pmThat is assuming the DUT doesn't affect the phase and amplitude of the TG. AFAIK most DUTs will affect the amplitude and phase of the TG so you'll need to measure the TG output while it is loaded by the DUT.

author: Neganur
author_rank: Unknown
timestamp: March 10, 2018, 04:21:53 pm
content: Could you elaborate how you think the phase is being affected and how is this relevant if you are comparing the phase at the input to the output?It’s a relative measurement after all.

author: simone.pignatti
author_rank: Frequent Contributor
timestamp: March 10, 2018, 04:50:13 pm
content: I have few more images about it which show the different mode. The unit was not connected to a signal or component. Would you like me to post them?