REVIEW - Owon SDS7102 - A look at the SDS series from Owon

[nkcelectronics]

We are running a New Year sale on the SD7102-V in Amazon.com for $500.

http://www.amazon.com/SDS7102-Digital-Storage-Oscilloscope-2-channel/dp/B006G54K3G/ref=sr_1_2?ie=UTF8&qid=1325461707&sr=8-2

[rf-loop]

We are running a New Year sale on the SD7102-V in Amazon.com for $500.

http://www.amazon.com/SDS7102-Digital-Storage-Oscilloscope-2-channel/dp/B006G54K3G/ref=sr_1_2?ie=UTF8&qid=1325461707&sr=8-2

This may be just too complicated, but the forum have the "Buy / Sell / Wanted" section. We all know that this is a very difficult and will certainly require a lot of studying. But it need hardly the highest level of qualification, usually in the sheer ability to read is enough. Even many foreign language people succeed with this.

https://www.eevblog.com/forum/index.php?board=7.0

[HexfeT]

Hi all,

I need a scope. I researched on the net and found marmad's OWON SDS7102 review and this topic. I have read topic, but not fully understand revision history of this model. how many times revised this product and whichever is last version?

I will buy SDS7102 from ebay, but i afraid to be have a defected or old revision copy. I search from ebay and found two model of SDS7102. "SDS7102" and "SDS7102-v". is -v manufacturer's labeled new official name? or added by seller?

I want new improved and faultless (fan noise, ch1 noise, bad bandwith, bad designed pcb for RF signal etc.) hardware revision SDS7102. How can i make sure that, or which seller to can be trusty about this?

(sorry for my bad english.)

[alm]

Buying from a reputable dealer, not some random ebay vendor, might help.

[aghp]

SDS7102  is without VGA output connector. (in this case there may be old RS232.  It is fectory default.
SDS7102V is with VGA output. (SVGA 800x600)

Old version is just as good as it was before they make some improvement. It was also amazing good in this price class.

New improved version is better.
How to regognize new improved version?

In this new version LAN is factory default!
If there is no LAN it is nearly exactly sure it is not this "new" version.

Short time after Owon start "new" version there was CH1 noise problem in some units.
This is reviewed here.  There is also now Illustrated Guide for repair it. It is fully mechanical work! No need any solder work.
Solution is official Owon solution what they use now in production. Guide is not Owon official material, it is quickly (and littlebit loose) made by me becouse Owon (public) service manua is, how I can say,  just for fun. Not real professional service manual and also today it is extremely obsolete.

If unit have serial prefix SDS71021149xxx or below (but still new improved version) it perhaps sometimes have this issue. If unit srerial prefix is SDS71021152xxx it do not have this issue. In other way these are same.

Every manufacturer what I know, Tektronix, Agilent, Rohde&Schwarz etc..  They all have stated that they develop all times equipments and they things may change without any pre information and if I buy, how I know?   Owon is not alone...

What is bad BW.

Original Owon SDS7102 is 100MHz oscilloscope. BW - 3dB point is well over 100MHz (around 150MHz) . Some other may sell these as 150MHz oscilloscope. Is it bad BW?

New improved version is also specified (named)  for 100MHz. There do not need be more!
But there is Owon "gift" for "hackers" and they give free factory "hack" so that peoples do not need try and break working units...  it is (today) typically around 220 - 260MHz -3dB point if compare 1MHz level and using 6 div p-p sinusoidal signal.
Rising time was originally good. In this class extremely good.
Now it is even better. Typically well under 2ns.

Who tell that Original version BW is bad he do not know what he is talking, exept if he is talking too wide BW. Maybe there is some misunderstooding about what is what?

What I can tell is that if there is something wrong in BW it is "too good".
In some cases it may give some aliasing issues if user do not be careful or if he do not understand at all these basics of digital oscilloscopes.  Specially if use 2 channel same time. It have just  -3dB point frequency equal or near with Nyquist frequency.
But also many other oscilloscopes have this more bad in practice - becouse lack of high speed memory so they need drop sampling rate fast when go to more low horizontal speeds.

So, this CH1 noise issue is easy case. And well... there is lot of user who never find it alone without these information here.
I'm sure if I  make this issue to one oscilloscope and give it to 100 average entry level hobby users without they know anything about issue (just like never heard)... maybe 5% find it and think... "well this is chinese cheap oscilloscope and maybe it is feature". Rest 95 do not maybe see never anything. Of course peoples now see it becouse this have introduced here. All times these kind of issues "overheat". Same as FAN noise issues.Who think that 1000 peoples come here for tell that they do NOT have extra FAN noise. But if there is 10 noise cases you maybe find half of them here. This is typical in all cases today, Not only with oscilloscopes.

One person have talk he find Agilent some RF noise problem... well whole world know that Agilent oscoilloscopes have this problem and are nearly as paranoic about it. Where are these hundreds or thousands who are happy?

I have looked (long time ago) Rigol. If I compare Rigol FAN noise (I hope they are more silent today) and Owon normal FAN noise. Owon is like cat walking and Rigol is like chinese Shenyang J-15 taking up.
Owon drive 12V FAN with littlebit over 8V (typical).

If seller test carefully what he sell there can avoid most of issues and also  still very rare FAN audio noise problems.
Also I have seen some FAN what keep some random noise as they are new, some of these are silent after 10-20 hour run. (yes it may also happend, I have seen it.)

If FAN really is or go bad, it is not end of world, Just simple repair work and that's it. It takes just 10 - 12 minutes and this kind of fan is cheap. (I know many peoples think why this is not better. If start this kind of thinking there is 100 parts what can be "littlebit" more quality and price. Well, where is then "entry level" price class?
But FAN is also critical component and I really hope Owon change FAN model or manufacturer ans model.

Just time ago they change all cheap relays inside scope to better (and more expensive).

LAN, it propably is new version
If not LAN, nearly sure it is old (but still amazing good oscilloscope).
V (VGA) it can be in old and new.
CH1 noise: In some first manufacturing lots of new version
FAN audio noise. THis is lottery. Every 1 of 50 "win" and Owon make RMA or send FAN to you. (if problem is real probleml... and not "I do not like it becouse it can theoretically be more silent.")

Of course from these sellers who test really what they sell,  propability to get bad FAN is also more low. If lamp is ok when I shut off it... how I know it lights when I next time power on it. This is still true, what ever kind of tests who ever make. Seller, manufacturer, component manufacturer etc. 
After then come after sales customer care. Who believe it is free dinner?

[DaMaDo]

Just got mine today from ebay's smtzone (AideTek).

The info is the same as Deneteus:

Firmware Version 2.5.1  Serial: SDS71021152xxx

I'm not sure if this was my fault, but I got a strong burning smell followed by a shut down. I had to turn off both switches and it then powered back on fine.

What caused this is:

I was following the manual on probe compensation which worked fine, then I did the self calibrate. Right after that I connected the probe back on the compensation output and the screen went a bit crazy, then blank, then it shut down. I restarted and the bad smell came on strong for a bit and then has since been decreasing. I guess the smell could have started right when it shut down.

It seems to be working ok now though.

This is my first scope so I don't know what's normal yet. After reading the manual, I'm going to go through online tutorials.

[rf-loop]

"Firmware Version 2.5.1  Serial: SDS71021152xxx"

Please can you list what languages there is selectable?
If you do not regognize some language just list
I try still find what  is difference in
Version 2.5.1  Serial: SDS71021152xxx
Version 2.4.1  Serial: SDS71021152xxx
(becouse they are same manufacturing lot but all 2.5.1 what I have heard are still outside of EU and I know big parcels are labeled in factory "EU")
So it is also possible there is different languages. Also in Owon specs, "Chinese, English, Others"

[cex]

I'm not sure if this was my fault, but I got a strong burning smell followed by a shut down. I had to turn off both switches and it then powered back on fine.

This is my first scope so I don't know what's normal yet. After reading the manual, I'm going to go through online tutorials.

No, that is not normal....

[cex]

Owon has contacted me offering to send me the spare part required and a new fan.
Will let you know when I receive them.

Great, please take a few shots of those spare part and share it here once you got it.

Received the parts yesterday.
Here are a couple of images:





The spacer seems to be an standard nylon hexagonal spacer.
For the fan I don't know if this one will make less noise until I replace it. It is 60mmx60mmx10mm in size.

Regards.

[aghp]

cex:

maybe you have seen this Illustrated Guide for Assembly and Disassembly Owon SDS improved version

In very old "first version SDS" Owon made service manual example Fan assembly is different. (on the opposite side of the metal plate)
It can maybe find somewhere internet. Some people have published it (Without the Owon approval?)

In this Guide is not information for FAN becouse it is only partial guide for this model.
This your picture is exactly same FAN what Owon use in production (until they change it).

It is standard 60mm/10mm  12Vdc Fan. And as all see in label it have cheapest possible sliding bearing.

This Fan need handle carefully becouse its bearing is "not best possible".

Also sometimes some Fan keep some extra noise just after they are new. I have seen lot of these and most of "new noisy" are ok after 20 - 40 hours power on (if there is some small random noise). But not all. Personally as seller I test all units before sell using 72 hour cycled  "burn in" run using also different temperatures. I have find only one really bad Fan. I suppose it was damaged in factory assembly maybe just becouse some loose worker. (bearing of fan was damaged)
Totally I have changed 3 fan (all before selling) becouse there was also two what I can not accept.

Normally this fan is not real problem. But it need be also ok in every single unit! Least it need be ok before send to end user!

Also I have asked Owon develop more accuracy to final QC. In this price class do not need be perfectionist but as long as better and more accurate quality control do not cost anything it is wise to do. It do not need more money. It need teaching. All China companies need learn quality thinking and not only thinking. It is teaching/learning question mostly. Only in rare case it need more money. But it may give money as rising name "good will" and better selling.  0.5k$ oscilloscope do not need be quality what can wait from 50k$ Rohde&S. But cheap things and even things without money can do and develop  better. Owon have good base. They may win or they may loose. They make decision. They have promised to listen customers. It must not be empty words.

But also finally, I do not at all mean that Owon is some crap. It is amazing good in this price class. But this quality can rise better in some things and it can do easy. Only littlebit teaching/developing... and care working peoles  better what give also better motivations... we are Owon workers, we need do perfect work - with every single unit... not only good average..

[cex]

Yes I saw your guide... thank you very much.
Owon sent me the "official" service repair guide, which is v1.0 (the same that is laying around in internet).

Maybe I'll give the scope some more hours of use to check if the fan noise goes away. On the other hand I'm considering using a Sunon mag-lev or another good quality fan if I have to change it.

Thanks again for your guide.

[DaMaDo]

"Firmware Version 2.5.1  Serial: SDS71021152xxx"

Please can you list what languages there is selectable?
If you do not regognize some language just list
I try still find what  is difference in
Version 2.5.1  Serial: SDS71021152xxx
Version 2.4.1  Serial: SDS71021152xxx
(becouse they are same manufacturing lot but all 2.5.1 what I have heard are still outside of EU and I know big parcels are labeled in factory "EU")
So it is also possible there is different languages. Also in Owon specs, "Chinese, English, Others"

I don't know  how to do the screenshot thing yet, so here's a picture of the languages:

[rf-loop]

Thank you DaMaGo!

Language set looks exactly same. So there is not different languages for localization.
Language menu looks exactly same. So there is not different languages for outside EU versions. It do not explain version difference.

This version difference is strange becouse manufactured same time.  (1152)
Can you tell if last numbers in serial is less or more than 100?

Only what I have heard from "third part" is that "something" can wait later, maybe before end of January.

[DaMaDo]

rf-loop, the last 3 are over 100, almost 200.

It seems after the battery charged overnight, the unit doesn't get anywhere near as hot as it did. Last night, the BNC connector on the back was almost too hot to keep a finger on it. Now everything is room temp.

I think I might still exchange it just in case.

[0xdeadbeef]

Wasn't there some rumors that Owon was about to release a freely available firmware for the SDS line in mid/late December? Any news on this?

[rf-loop]

Hi, guys!
I want to buy the SDS7102. But I understand that it can't operate with equivalent frequency (I didn't found it in user manual). Is it necessary option for periodical signals? How often is it used?
Thank you!

Of course there is some "theoretical" situations when it may be nice to have but only if it work well. I have not seen any cheap oscilloscope where it work well in this meaning what I mean.

Owon SDS serie do not have and do not really need this "Egual-Time" aka "Repetitive" sampling mode... becouse... this is not old tiny memory Tektronix. Also it is not 10MSa/s sampling 100MHz oscilloscope what really need this "Equ-time" sampling method.

Owon SDS7102 ADC can do 1GSa/s or 2x 500GSa/s.
It have 10 Megasample full speed acquisition memory for both channels.
It have real time sampling

 Disadvantage with Equ-time" samplin is that it can use only with signals what are (exactly)  continuous until whole sampling sequancy is done. 
Yes if people have nice sinevawe example 100MHz and then have 10MSa/s ADC and good clock.. it can make image about this sinevawe. After waiting long time. If make 1. sampling turn, say example 1 sample to 100 ns time window and just to trig point (time reference zero) and keep this trig point. Then next 2. turn. Shift clock -1ns(related to trig point)... plot point to display... then 3. turn shift clock +1ns to trig point time and agen...4. -2ns, sample and plot point to display... etc (this is trig point prioritizing sequential repetitive sampling, there are lot of different methods, pure sequential, random, random littlebit weighted to sampling point etc ) then wait 100 turn. Well you have just 100 points after every 1ns and it is now 1GSa/s made by 10MSa/s ADC. 

These was first developed becouse fast real time sampling was nearly or just impossible.
This also continues today becouse someone want 1GHz or 10GHz or 100GHz oscolloscopes what are possible only with some this kind of system until we have ADC or other method to measure signal and display it. Analog oscilloscopes can do it easy, up to 1GHz and even more. But making these today is so expensive that who can buy these with volumes. No one.

There can make special ADC hybrids what can do fast ADC today.

Also old times there was problems with full speed memory amount.
If we have oscilloscope where is small memory. As Tektronix say in "XYZs of Oscilloscopes": "Sample rate varies with time base settings – the slower the time base setting, the slower the sample rate."

Many older example 100MHz oscilloscope use 100MSa/s or even 10MSa/s. They really need this "Equal-Time" sampling.
And becouse "Old times" all good high-end name scopes have "repetitive" or "Equal-Time" super fast samplerate of course cheap oscilloscope manufacturers still use this for selling. Or some scopes still also need this becouse lack of real time enough sampling speed.

Owon do not need becouse it keeps its real time sampling rate also with slower horizontal speeds. 1GSa/s real time  is possible all speeds from 500us/div to 2ns/div in single channel use and 500MSa/s to both channels simultaneously from 1ms/div to 2ns/div.  This is just possible becouse Owon have 10M full speed acquisition memory for both channels.

It is perhaps some times nice if can do 10 - 50GSa/s "Equal-Time". If it have really enough accurate specially low timing jitter ADC and special good expensive timing "machine" in system it can do and sometimes it may be nice.  (it need remember that 500MSa/s Nyquist is 250MHz! So if with 2 Channel use neer go over 100MHz frequency component it is nice to have some equal time sampling... but wait a minute,  this IS 100MHz oscilloscope. So... where is problem. Imho, nowhere. But if try use it as 200 or 300MHz scope, it is not possible with two channels simultaneously. (analog front end is like 200MHz scope and in single channel use it is useful oscilloscope up to 200MHz frequency and more.  Example 50MHz fast rising square vawes  with 5th harmonic attenuated around ("only") 3-4dB and even 7th harmonic around -6dB. (think square vawe Fourier)
If accept 5th harmonic drop around 6dB it can well use for 60MHz square vawe. It can show well under <2ns risetimes in real time. 

I do not know any cheap oscilloscope what have Equal-Time  from 10GSa/s up to oh well heaven is limit... where is enough good timing and ADC for this.  And, where it can use better if real time samplerate is enough?
Also it can think how accurate trigger it need.

1GSa/s real time  means ADC databyte every 1ns.  (databytes stream speed is 1Gbyte/s)

I want see acquisition system in cheap oscilloscope what is good enough for example doing continuous 50GSa/s equal time sampling. What it means. It mean 1GSa/s ADC have first sampled one turn... then sequentially or randomly time shifted so that after 50 turn we have sampled points after every 20ps yes after 20pico second. And so that this timing jitter is markable lower. Say example <5-10ps (or even <20ps) if want anything useful for these extra 49 sample points between original first turn samples with 1ns time interval. 

Then also, if analog channel have frequency response for example 100MHz -3dB gaussian.
Now we sample real time 1GSa/s. What is this analog channel with 500MHz? (Nyquist-Shannon)
Now, what hell advantage it can give with 50GSa/s Equal-Time sampling. Just nearly exactly nothing but noise. Becouse bad sampling accuracy make it more bad, not more good!

This need also chinese EE's learn and peoples who read thousends of advertisement. Also do not take all arguments from Tektronix or Agilent (HP) old "teaching" and "teaching/ad" materials becouse they may made only compatible just exactly for they own unit or just for named competitor model.  If look 1-2GSa/s cheap today entry level or littlebit better oscilloscope... just jump over this Equal-Time samplerate.  Exept if you also want buy 100Mpixel camera with 2x3mm sensor and with cheap  "camera obscura" lense.

I'm happy if someone can show to me any one cheap under 1k$ digital oscilloscilloscope what really can do it (real good Equal Time sampling with accuracy what 50GSa/s or 10GSa/s need) and really can show it on the screen so that there are every real sampled point plotted on the screen. (I like see this "shotgun hit pattern" and ask - what is now useful really?).  I have not seen any good, never. Not even close this what give some value in this meaning.
 
But then... I have seen example 10MSa/s Hewlett-Packard what can do it (up to 10GSa/s equal time (or was it 5GSa??..) But still there is sampling jitter etc noise in these datapoints so that maybe really useful is around 1-2GSa/s egual time speed and other then these rest of dapatpoints do not give any more information.

Show me one cheap ADC system what can do this, show me any cheap clocking construction from cheap oscilloscope  what can do it.. and then there is some processor/FPGA system also what do somthing for this timing. Well, in this meaning what is 50GSa/s Equal time sampling. It is just bullshit and big bullshit. Have anubody really seen on any oscilloscope screen these real equal time sampled points without any DSP recalculations and "cleaning" - "washing" for just nice picture. What is meaning for these equal time sampled points?
Nothing... just nothing. They are for selling. They are only that they can write to AD or even oscilloscope front end. It is very nice to show small hobbygirls that my oscilloscope front panel reads 50Gs/s just as I have seen this bullshit in one old Fluke. Just as plastic crap lense camera have 24Megapixel on the 4 millimeter CCD and my scanner have zilion pixel resolution (interpolation)) I understand if chingwangchangnippon write this to front panel but that Fluke. (It was Philips-Fluke)

I can well understand why 300MHz high end analog front end oscilloscope with 20 or 200MSa/s ADC system need "Equal-Time" or "Repetitive" sampling. It realli give something.. really. For repetitive signals of course.

But with cheap 100MHz analog front end together with noisy amplifiers etc... then insert 50GSa/s "equal time" sampling option and still oscilloscope have example 1GSa/s real time ADC.

It is maybe easy to undertand what foolishness it is. Of course it is not foolishness if this  "feature" can sell to someone.

[zdp_84]

Hi, guys!
I want to buy the SDS7102. But I understand that it can't operate with equivalent frequency (I didn't found it in user manual). Is it necessary option for periodical signals? How often is it used?
Thank you!

Of course there is some "theoretical" situations when it may be nice to have but only if it work well. I have not seen any cheap oscilloscope where it work well in this meaning what I mean.

Owon SDS serie do not have and do not really need this "Egual-Time" aka "Repetitive" sampling mode... becouse... this is not old tiny memory Tektronix. Also it is not 10MSa/s sampling 100MHz oscilloscope what really need this "Equ-time" sampling method.

................

Thank you very much!
I already ordered SDS7102 two days ago from eBay.
Now waiting...

[tinhead]

ehm rf-loop ... ADC quality/speed is nonsense for equivalent sampling (which is nothing else than sequential sampling on real time
scope/ADC system), "one bit ADC" sampling with 100MHz is good enough to measure Ghz signals - all you need is good timing
and analog bw higher than the actuall real-time ADC Nyquist bandwidth (the best frontend is no frontend like on real sampling scopes)

And exactly here is the major problem - analog bw costs money, you can only get it for free when manufacturer was
nice enough and designed universal frontend. Example Tonghui - frontend is switching from 60MHz to ~250MHz
when equivalent sampling or FFT will be enabled (on 60MHz model!!!) - and due only two ADCs the jitter is low
enough to use equivalent sampling. I tested it and it was the only chinese scope able to use that mode properly,
a big Thumbs up for that to Tonghui.

And the others? Well, useless .. not only because there is not enough analog bandwidth but especially because
some EEs simply don't know what equivalent sampling means. Instead of using one or max 2 ADC (to reduce
potential jitter becuase timing is everything in that mode!) they enabling all of them - and now think about the
jitter between 8 ADCs in Tekway/Hantek/Instek or even 10ADCs on Rigol/some UNI-T.

So for low bw models equivalent sampling can be implemented cheap, for the typical 1-2GS DSOs with 100-300MHz bw
the problem remains the frontend and timing accuracy.

Owon have good frontend and could on paper enable the 500-750MHz potential bw on even 60MHz models
when there would be equivalent sampling implemented ... and Owon is using one or max two ADCs ...
so yes - equivalent sampling could make sense/be implemented on these models.

Why Owon did not implemented it ? Probably because every chinese DSO manufacturer is thinking about
profit - and only profit. This is bilions $ market in china!
A working equivalent sampling is today still something special  for chinese manufacturers, but not a reason for most
enduser to buy a gear because soem even don't know what this mode meand and others know that there are typical
sampling scopes available doing that job much better (see below).

Instead of that Owon just put 10Mpoint memory (with no markers, no dual window, cheap zoom ...) and
spend some money on announcements and "false" prospects (since months the website, user manual are
still not fixed, still mentioning 10Mpoints in all modes which is not truth as we know) and that's a good reason
to buy it for some users (where others are using dual windows, markers, complex zoom, O.T. triggers and holdoff to see the
same amount of information on "few kpoints" scopes)

I'm happy if someone can show to me any one cheap under 1k$ digital oscilloscilloscope what really can do it (real good Equal Time sampling with accuracy what 50GSa/s or 10GSa/s need) and really can show it on the screen so that there are every real sampled point plotted on the screen.

sure, http://www.fastsampling.com/ with 1ps accuracy.

[rf-loop]

sure, http://www.fastsampling.com/ with 1ps accuracy.

There is programmable delay what resolution is 1ps. What it tell about whole system sequantila all timing errors or accuracy.

But, it is nice building box and this price... surprice and  it can use as oscilloscope after there is also computer and for some special use with only repetitive signals just becouse real sequential delayed sampling method.

This 1ps is only programmable delay setting resolution and  this is not 1ps accuracy.
Btw, 1ps is 1x10 Exp-12. (1THz cycle time) Light travel around 3.3ps one millimter.



But then there come typical cheap oscilloscopes "Equal-Time" modes with 50GSa/s - yes and smile.

[tinhead]

Allah!  ... of course not accuracy but resolution, the accuracy is between 10ps and 250ps only
(based on how good the guy implemented the TCM delay and few other things)

And yeah, the 25-50GSs are of course only (up)calculated, they can be real for sure but not with an cheapo frontend
and nanoseconds of jitter in clock.

[rf-loop]

Example Tonghui - frontend is switching from 60MHz to ~250MHz
when equivalent sampling or FFT will be enabled (on 60MHz model!!!) - and due only two ADCs the jitter is low
enough to use equivalent sampling. I tested it and it was the only chinese scope able to use that mode properly,
a big Thumbs up for that to Tonghui.

Becouse I'm interest about all, also this Tonghui. (Tonghui is (maybe) one manufacturer in china what is also (with some equipments) in the professional markets in China)

What is this model?

[tinhead]

Becouse I'm interest about all, also this Tonghui. (Tonghui is (maybe) one manufacturer in china what is also (with some equipments) in the professional markets in China)

What is this model?

i tested TDO3062A which is already "older" model, the current Tonghui scopes have better or more ADCs and
sampling with 1GSs instead of 400Mss.

Overall quality was very good - PCB clean, shielding or trigger and channels, eough decoupling caps everywhere, clean supply
for ADCs, each voltage good filtered. No cheap components, good designed rontend->ADC couling (no relays but AD8182 to reduce
the cap. load allowing better bw).


Frontend was based on discrete FET and AD8330 (that's 150MHz VAG, 250 MHZ at -10dBm), trigger with AD8184/ADCM562BRQ,
ADCs like on Rigol/HanTekway - AD9288 - but only two o them in this 400MSs model, FPGA Cyclone III with DDR-RAM
and not SRAM "crap" (well SRAM is good too, but expensive and most scopes are sampling not with ull speed these SRAMS)
- and as in the specs really 2.4Mpoint, GUI with TI DSP ADSP-BF531 like on Rigol.

The jitter was almost zero, surprising good for low-end scope. Sure only 4 ADCs, but ttaht in principle
enought for other manufacturers using interleaved ADCs to make a bullshit

Actually there was nothing crap on that scope, except
- small 5.7" display (but for sure you can work with that too)
- firmware which was looking like on Rigol and not Tekway
- low sample rate on that model.

It could be interessting to see these new models (B and BS) with 1GSs and integrated frequency/function generator.

[rf-loop]

Overall quality was very good - PCB clean, shielding or trigger and channels, eough decoupling caps everywhere, clean supply
for ADCs, each voltage good filtered. No cheap components, good designed rontend->ADC couling (no relays but AD8182 to reduce
the cap. load allowing better bw).

The jitter was almost zero, surprising good for low-end scope. Sure only 4 ADCs, but ttaht in principle
enought for other manufacturers using interleaved ADCs to make a bullshit

Actually there was nothing crap on that scope, except
- small 5.7" display (but for sure you can work with that too)
- firmware which was looking like on Rigol and not Tekway
- low sample rate on that model.

It could be interessting to see these new models (B and BS) with 1GSs and integrated frequency/function generator.

Thank you. Interesting.

[DaMaDo]

Not sure if battery performance has been posted before, but I got a little over 4.5 hours on just the battery while using 1 channel for about 80% of the time and the last 20% with 2 channels.

[aghp]

Not sure if battery performance has been posted before, but I got a little over 4.5 hours on just the battery while using 1 channel for about 80% of the time and the last 20% with 2 channels.

It have been tested also here.