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Possible GW Instek GDS-1000B hack

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rf-loop:

--- Quote from: nctnico on April 14, 2018, 06:22:18 pm ---However the GW Instek doesn't have bugs and it has features like free-form math, signal filtering, data logging, etc which are very useful when developing circuits and/or hunting for rare events. For 100MHz 250Ms/s is more than enough and high waveforms/s is not really important unless you get into triple digits. Even very high end oscilloscopes don't have high waveforms/s. The same goes for the history buffer. You can always turn on segmented recording and get exactly the same. The GW Instek can also do statistic analysis on the recorded segments.

--- End quote ---

GDS1000B ?  Perhaps you are talking some other GoodWill models.

250Msa/s is enough for continuous pure sinewave. Yes, barely. For what you need scope there if you know you have pure 100MHz sinewave. Veery useful to look... ?

History buffer and segmented memory (sequence acq) are same? Really? Looks like you do not even know what they are. Or is it so that 1000B do not have at all fast seg acq.
"However the GW Instek doesn't have bugs"  |O Bug free scopes where FW updates frequently with long list of repaired bugs. Why  need repair if they are bug free.

Distelzombie:
Some websites say the GW Instek has 1GSa/s PER channel. So I assumed it will actually have 1GSa/s/channel - like, what that obviously implies, 1GSa/s when using all channel at once. (1GSa/s1GSa/s1GSa/s1GSa/s just to write it a few times more)

rfLoop, you compared the Siglent to the unhacked version? Doesn't it get more memory and stuff, like the Rigol? I really wish I could get the Siglent somewhere, but that is impossible without hire-purchase/installment payment - what is even the correct term? (german)

tautech:

--- Quote from: Distelzombie on April 15, 2018, 12:03:11 am ---Some websites say the GW Instek has 1GSa/s PER channel. So I assumed it will actually have 1GSa/s/channel - like, what that obviously implies, 1GSa/s when using all channel at once. (1GSa/s1GSa/s1GSa/s1GSa/s just to write it a few times more)

rfLoop, you compared the Siglent to the unhacked version? Doesn't it get more memory and stuff, like the Rigol?

--- End quote ---
Be aware instruments in this class normally only have 1 or 2 ADC's.
So sampling rate is always listed a max in whatever usage configuration allows it. This is commonly just for 1ch in a DSO with a single ADC but those units with 2 will allow use at max sample rate with 2 channels in use, normally 1+3 or 2+4 or an equivalent configuration.
To allow sampling @ 1Gsa/s for all 4 channels you'd need dual 2Gsa/s ADC's or a much more expensive single ADC.

A good rule of thumb for many modern DSO's is the first digit in the model name signifies the GHz sample rate of the ADC/'s used.


--- Quote ---I really wish I could get the Siglent somewhere, but that is impossible without hire-purchase/installment payment - what is even the correct term? (german)
--- End quote ---
LayBuy is the term used here where you make progressive payments until equipment is paid for in full and then it is dispatched or collected.
Maybe one of the European dealers can accommodate your needs.
https://www.siglenteu.com/how-to-buy/

rf-loop:

--- Quote from: Distelzombie on April 15, 2018, 12:03:11 am ---Some websites say the GW Instek has 1GSa/s PER channel. So I assumed it will actually have 1GSa/s/channel - like, what that obviously implies, 1GSa/s when using all channel at once. (1GSa/s1GSa/s1GSa/s1GSa/s just to write it a few times more)

--- End quote ---

This is nice example how carefully it need read when you read manufacturer web sites. They try hardly that reader produce wrong imagine in his mind (one leader for this kind of things are Keyshit when you read advertisements and application notes).  Read data sheet, read itroduction, read GDS-1000B user manual. How long it take you get right answer for sampling speed and  that it have exactly 1GSa max for all single channel... yes this pops up to your eyes immediately.  ....but wait a bit... they did not tell that simultaneously. Yes, 1GSa/s for every channel and they did not lie. Take Ch 1 alone...max 1GSa/s and then take Ch2 alone...again max 1GSa/s and so on. All channels have max 1GSa/s. 

GoodWill GDS1000B  4 channel models:
Fact is - and this is true fact. It have single ADC chip. It is Hittite HMCAD1511.  (You can see it also if you look Dave's tear down video, he tell it clearly and ans also show it clearly when he look inside.)

1 channel alone in use: Max 1GSa/s
2 channels in use: Max 500MSa/s for both channels simultaneously.
3 channels in use: Max 250MSa/s for all channels simultaneously.
4 channels in use: Max 250MSa/s for all channels simultaneously.

Siglent SDS1000X-E 4 channel models:

Fact is - and this is true fact. It have two ADC chip. They are Hittite HMCAD1511. 

1 channel  in use: Max 1GSa/s
2 channels in use: Max 1GSa/s for both channels simultaneously.
3 channels in use: Max 500MSa/s for all channels simultaneously.
4 channels in use: Max 500MSa/s for all channels simultaneously.

What need hack in Siglent and then get something more like Riglol 1kZ
Siglent have all out from factory box and lot of more. It beats this Rigol wonder box just hands down in every single corner and after then give also lot of more powerful tool with performance what Rigol Zbox can only dream.
They are like night and day if compare performance as real tool. Just forget this Rigol 1kZ. Only feature there is that it is bit more cheap.
What features you can hack in Rigol DS1000Z series?  All because it is designed for hack as marketing trick.
What features you can hack in GoodWill GDS1000B?  This I do not know.
What features you can hack in Siglent SDS1000X-E series? This I do not know.

(Saelig)
DS1054Z Price: Reg. $399 Sale! $349  -  50MHz out from box, Hackable to 100MHz, single 1GSa ADC
GDS1054B Price: $429.00  - 50MHz out from box (hackable ?  ), single 1GSa ADC
SDS1104X-E Price: $499.00 - 100MHz ready out from box, (hackable ?  ) double  1GSa/s ADC

Yes there is price difference and with true reasons. It is amazing that  price differences are not more.
If Siglent is 2 times Rigol price I think it is still cheap if look features and performance.

ETA: But still, if budget is limited without exeptions to Rigol price and absolutely nothing more and no possible to wait and save bit more, Rigol is not bad choice.  For many kind of hobby and educational use if we set hard top limit to Rigol price,  it is still perhaps best possible what can get if we talk 4 channel stand alone digital oscilloscopes.

Distelzombie:

--- Quote ---Yes, 1GSa/s for every channel and they did not lie. Take Ch 1 alone...max 1GSa/s and then take Ch2 alone...again max 1GSa/s and so on. All channels have max 1GSa/s. 
--- End quote ---
Very great...

--- Quote ---Fact is - and this is true fact. It have two ADC chip.
--- End quote ---
knew that

--- Quote ---Rigol DS1000Z series?  All because it is designed for hack as marketing trick.
--- End quote ---
I think the same. Just can't be a mistake.

--- Quote ---Siglent have all out from factory box and lot of more. It beats this Rigol wonder box just hands down in every single corner and after then give also lot of more powerful tool with performance what Rigol Zbox can only dream.
They are like night and day if compare performance as real tool. Just forget this Rigol 1kZ. Only feature there is that it is bit more cheap.
--- End quote ---
I really really really wish I could buy that. I kind of knew parts of that already. Also it is cheaper as the Instek where I live. But more expensive than where you live. Including taxes or what VAT is...
instek 545.60 €
siglent 510.51 €
rigol 404.00 €

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