Products > Test Equipment
Agilent 54835A scope (4 channel 1GHz / 4Gs/s) repair & uphack
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TheSteve:
Decided I should try upgrading from version 3.50 today.
As nctnico has already mentioned the built in upgrade tool only wants to read from the Magneto Optical drive. He used a hex editor to change the path so he could read the upgrade files from a USB drive. My scope has no USB ports so I tried something else.
I unpacked the 4_3_upg upgrade package on my desktop and copied the files directly to the scopes hard drive. I then booted the scope, killed the scope app and used explorer to copy the files to c:\scope\upgrade\scope\temp\
Once the files are copied you can run HP548UPG.exe directly from that directory and it will perform the upgrade.
With version 4.3 running I removed all of the files from the upgrade directory and repeated the process with the 4.5 update.
It was a pretty hassle free way to upgrade the scope. Going from version 3.5 to 4.3 easily doubles the boot time of the scope(3.5 direct to 4.5 might not as it will skip the web features). I suppose that is the tradeoff for adding the built in webserver with webcontrol. If nothing else it makes it easy to grab screen shots.

Jwalling:
This just showed up if you're interested nctnico.
http://www.ebay.com/itm/Agilent-HP-Keysight-54845-66502-Attenuator-for-54845A-54845B-54835A-T7-B17-/182713390428?epid=12003971610&hash=item2a8a91155c:g:a3AAAOSw8VJZjg9C

Not cheap, but there's a BO.
nctnico:

--- Quote from: Jwalling on August 12, 2017, 09:33:42 am ---This just showed up if you're interested nctnico.
http://www.ebay.com/itm/Agilent-HP-Keysight-54845-66502-Attenuator-for-54845A-54845B-54835A-T7-B17-/182713390428?epid=12003971610&hash=item2a8a91155c:g:a3AAAOSw8VJZjg9C

--- End quote ---
Interesting but I think a new relay may be cheaper and there is also the question whether the relays aren't worn on an attenuator from Ebay.
eurofox:
I joint the club, just won a dead 54845A, nice cosmetic with install disk, manuals, original keyboard and mouse.
Tony_G:

--- Quote from: eurofox on August 17, 2017, 04:43:59 pm ---I joint the club, just won a dead 54845A, nice cosmetic with install disk, manuals, original keyboard and mouse.

--- End quote ---

Nice - Look forward to seeing the photos and the story of bringing it back to life.
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