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Agilent 54835A scope (4 channel 1GHz / 4Gs/s) repair & uphack
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JanNousiainen:
Holy freaking crap!  :o

I followed through this article and did some measurements: http://www.dasarodesigns.com/projects/fixing-an-hp-agilent-54845a-infinium-oscilloscope/

And guess what? In my scope the -3.1V supply shows +0.8V, same as in his scope! So it is probably failed opamp in my scope too!  Could it really be so simple? ^-^

Going to order few LT2726 IC's ASAP...
JanNousiainen:

--- Quote from: Tony_G on August 30, 2017, 03:19:49 pm ---
--- Quote from: Tony_G on July 09, 2017, 12:24:13 am ---In case you need it I saved a copy of the software folders from the Keysight FTP Server (they went missing last time I checked there)

https://1drv.ms/f/s!Amqar8_XQ9Uzj6YhN1xHdM8tQdKMOA

TonyG

--- End quote ---

I used a parallel port CD-ROM drive I bought from eBay ("MicroSolutions Backpack Parallel Port CD-ROM Drive", I paid $14 for it but I took a quick look and they seem to be much more expensive now). Apparently you can hook up an IDE CD ROM drive on the secondary IDE channel though so I'd try that path, especially if you have one laying around already.

TonyG

--- End quote ---

Thank you for the link :) I think I will try the IDE CD-ROM first, could be easier and faster to source one of those. Or, I do have few already but they are in different country than me...
JanNousiainen:
Now a stupid Infinium noob question  :P

Do the upgrades only contain the scope SW and not OS? Looking at the upgrade file sizes that might be the case? I have not yet upgraded SW so I don't know.

If updates only contain scope SW and it is OS independent, can I just install Windows XP to my scope (now Windows 95) and then install upgrade on that? Provided that my ancient HW is able to run XP that is.
TheSteve:
The upgrades I have used are scope applications only. Based on what I've read I'd stick with Win98.
nctnico:
I tried to install XP but the problem is that the drivers for the acquisition card are not available. The Windows98 drivers won't work on XP because XP is completely different when it comes to drivers.
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