Electronics > Beginners
Oscilloscope spec question
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MrW0lf:

--- Quote from: ploughna on September 21, 2018, 02:19:21 pm ---That's very helpful - thank you.
So with the Siglent SDS1204X-E, 2 channels up to 200MHz and 4 channels up to 100MHz preserve the 2.5x rule of thumb formula.

--- End quote ---

AFAIK Siglent has 2 ADCs = 4ch up to 200MHz.
rstofer:

--- Quote from: Old Printer on September 21, 2018, 05:13:13 pm ---
--- Quote from: rstofer on September 21, 2018, 02:01:44 pm ---
For my money, I would probably buy the Siglent SDS1204X-E to get 4 channels and 200 MHz.  But it's around $750 and I'm not quite willing to spend that much right now.  I do have the Rigol.

--- End quote ---

I think the Siglent is hackable from 100 to 200 Mhz, maybe not as easy as the Rigol is from 50 to 100. If this is true, and the OP is comfortable with the hack, that puts the Siglent at $500. Worth looking into.

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It's my understanding that this is true.  I haven't followed along since I already have the Rigol and a Tek 485 when I need 350 MHz bandwidth.
ploughna:
I've read a few threads related to that bandwidth hack but honestly it looks quite involved and maybe even risky (at least for me). It also wasn't clear to me that the hardware was truly the same and the only differences lay in the software.
tautech:

--- Quote from: ploughna on September 22, 2018, 09:12:36 pm ---I've read a few threads related to that bandwidth hack but honestly it looks quite involved and maybe even risky (at least for me). It also wasn't clear to me that the hardware was truly the same and the only differences lay in the software.

--- End quote ---
With modern equipment the model BW is commonly limited with SW code.
rstofer:
The Siglent hack seems more involved than the Rigol approach.

First, I have to replace the firmware with a version with a known root password.
Second, I have to modify the contents of a file using Telnet
Finally, I have to upgrade the firmware to a new factory release.

All of the above is my vague recollection of the process which is described elsewhere.  The first step is where I get nervous.  Who created the replacement firmware?  Do they guarantee it won't brick my scope?  Is their firmware known to work on the latest hardware release?

This process is probably workable but it seems to me that it is a little more risky than for the Rigol.  I'm not sure I'm willing to do it.  It might be that the extra money for the 200 MHz vs 100 MHz BW just isn't that important.  The only reason I would consider buying the Siglent is for the BW because my Rigol works fine.
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