Products > Test Equipment
Gw Instek GDS2204E (200MHz 4 channel DSO) review
piramida:
--- Quote from: kcbrown on September 17, 2021, 01:53:32 am ---... and it's probably better to spend the money on making the math trace fast enough and flexible enough that the absence of the differential input feature wouldn't be noticed.
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Yes, a good solution.
Make it as a separate math channel, with vertical sensitivity adjustment with one knob. Solved by firmware. But all the same, I would like to be able to choose this channel as a source for FFT, SA or other mathematics.
--- Quote from: 2N3055 on September 16, 2021, 01:27:21 pm ---Check Siglent SDS2000X+.
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:-+ I am also considering this device ... as well as the picoscope 5000 series. :)
nctnico:
--- Quote from: kcbrown on September 17, 2021, 01:53:32 am ---
--- Quote from: 2N3055 on September 16, 2021, 01:27:21 pm ---
--- Quote from: piramida on September 16, 2021, 09:53:53 am ---5. And from the category of fantasy. Make it possible to combine two input channels into one differential input.
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5. No and, correct that is a fantasy! ^-^
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I do have to wonder how hard it would be to make it a reality. The scope already has hardware that is able to apply voltage offsets to the signal prior to amplification. How hard would it be for the offset to include the voltage supplied by one of the channels?
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For that you use a differential probe or pre-amplifier which you can put much closer to the circuit as well.
But still... there are oscilloscopes out there that have differential inputs. Some older Yokogawa DSOs for more specialised purposes come to mind.
ibuski:
Hi, I have been just a reader of this forum's contents so far. There are lot of valuable contents and I could gain much knowledge from your discussion. In that manner you can call me a free rider. I registered myself now just to say thank you to all members who enabled Hacking of GW Instek Oscilloscope, tested it, shared it and reported some successful experiences. Actually I don't own GW Instek brand Oscillo, but Iso-tech IDS-2072E. From its appearance, it was clear that they share the hardware. Of course it's possible that some software modification differentiate them, but from my experiences, usually they don't spend such efforts. So I tried GW Instek Hack on my Iso-Tech. It worked without any issues!! I could enable 200 MHz BW setting on my 70 MHz model. Spectrum Analyzer application is now active as below. For those who is wondering which digital oscilloscope to buy, I can suggest that Iso-tech works as same as GW Instek and you can hack it if it's the reason for you to buy GW Instek. I guess probably you can buy Iso-Tech Oscilloscope with less money than GW Instek's equivalent model due to the brand's less popularity.
Mortymore:
Hi ibuski!
Welcome to the forum.
I have an Iso-Tech also, and as you figured out, it's a GW-Instek rebranded.
You cant take your scope up to 300MHz if you wish. At first, I also "upgraded" mine only up to 200MHz, thinking that if it that was the max frequency commercially available, it should be the limit for the scope, but it's not.
For further reading about my adventure with the BW:
https://www.eevblog.com/forum/testgear/possible-gw-instek-gds-1000b-hack/msg2298513/#msg2298513
Have fun with your scope
ibuski:
Hi Mortymore,
Thanks for your reply and welcome.
I recall there was somebody who verified compatibility (or identity) of GW and ISO, that's one reason I could try, but didn't find the particular post. Now I see that was you!
I have only70 MHz probe and probably it doesn't make much sense to enable 300 MHz. I work only on Audio signal and that's another reason. Thanks for your comment anyway.
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