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Gw Instek GDS2204E (200MHz 4 channel DSO) review
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rhb:
I just updated my GDS-2072E from 1.35b4 to 1.35 using "safe mode".  The MD5 checksum is:

9a38e230f4a2168fd602aaef8352a71a  FW_GDS-2000E_V1_35.upg

I had the USB drive inserted when I turned it on.  I had only one file on the drive.  In "safe mode" the update file *must* be the first file in the output from "/bin/ls".  If it's not, the program to update the FW can't find the .upg file. I ran into that issue at some point, so I now just have a single file on the USB.  It's a practical use for a 512 MB SD card.

Has anyone sorted out how to generate the CRC for a .upg file?  It doesn't seem to match any of the CRC programs on the scope.
CC555:
Thanks rhb, I am going to try to update the oscilloscope again.
CC555:
I did the update using a 8 GB memory instead a 16 GB memory, with the 16 GB memory didn't work.
rhb:
I decided to fool around with the BW hack from the hack thread.  It works.  I've got a 40 pS pulser from Leo Bodnar.  Excellent piece of kit!

 I reverted to 1.28 so I could log in via ssh, applied the 200 MHz  BW upgrade. The 300 MHz is BS as that's above Nyquist of 250 MHz. I did the 200 MHz and then the 300 MHz just to see if there was a difference in single channel mode when Nyquist is 500 MHz.  No change.  All the other option hacks from the 2000B are already installed.

Interestingly, the 2074E as delivered had the same BW as the "100 MHz" after the hack.  It's actually about 85 MHz by the traditional rise time metric, so  not better than 70, but not quite 100.

I then updated the 2072E to 1.35 again and saved screenshots from the 2204E and the 2072E.

I need to quite fooling around like this and start working on FOSS FW for these.  That's what I bought the 2072E for.  I'm not about to risk bricking my MSO-2204EA.

nctnico:
I did some experimenting with the license generator from this post on my GDS-2204E:
https://www.eevblog.com/forum/testgear/possible-gw-instek-gds-1000b-hack/msg1256089/#msg1256089
I downgraded to version 1.21 because version 1.34 doesn't accept the licenses but version 1.21 does. The power analysis options doesn't seem to enable anything but the 300MHz option does work! The bandwidth went from 288MHz to 314MHz and now there is a 200MHz bandwidth limit option. Sure the 300MHz option isn't useful when using 4 channels but for that you can still enable 200MHz. All in all not bad!  ;D

Edit: the 300MHz remained when I installed firmware version 1.35 (currently the most recent).
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