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Agilent 2000a / 3000a Oscilloscope NAND Recovery

salvagedcircuitry.com

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Re: Agilent 2000a / 3000a Oscilloscope NAND Recovery

#5

Post by a1o »

> the MSO adapter can accept low power signals up to 40v, but it offers no input protection when the host oscilloscope is off. Thus, if the DUT (Device Under Test) has a short of some kind near the area of probing, and the host oscilloscope is not powered, there's a good chance you've just damaged the Maxim MAX9201 comparators in the logic analyzer section of your scope! It's worth checking all 10 pins for voltages outside the MSO operational range.

Whoa, it's been a long time since I haven't used these tools but I learned now I was very lucky when using because I didn't knew this and didn't check the voltages when using the logic analyzer in the scope I had at the time from Tektronix - which I guess had the same type of limitations.

Re: Agilent 2000a / 3000a Oscilloscope NAND Recovery

#6

Post by janice1999 »

If you like this kind of content, I highly recommend checking out the Youtube channel 'The Signal Path' [1]. It has some fantastic technical teardowns and repairs of instruments, including really high frequency equipment.

[1] https://www.youtube.com/channel/UCKxRARSpahF1Mt-2vbPug-g

Re: Agilent 2000a / 3000a Oscilloscope NAND Recovery

#7

Post by bloomingeek »

It's so good and satisfying to see a person ply a trade to success. When I find myself stressed out for some reason, I like to do something I'm well trained at to help my brain kind of reset, which often gives me a different way of looking at what stressed me in the first place.

Re: Agilent 2000a / 3000a Oscilloscope NAND Recovery

#8

Post by hobs »

janice1999 wrote: post #6

If you like this kind of content, I highly recommend checking out the Youtube channel 'The Signal Path' [1]. It has some fantastic technical teardowns and repairs of instruments, including really high frequency equipment. [1] https://www.youtube.com/channel/UCKxRARSpahF1Mt-2vbPug-g

You probably already watch him, but Marco is also great when it comes to similar content (he loves his multimeters) https://www.youtube.com/@reps

Re: Agilent 2000a / 3000a Oscilloscope NAND Recovery

#9

Post by hristov »

This is very interesting. I just have one minor nitpick. Broadcom did not buy Avago, Avago bought Broadcom. They then changed their name to broadcom as it was more recognizable in the industry (while keeping their old stock ticker AVGO as that was more recognizable in the financial industry).

This is entirely a tangent but the rise of Avago from a minor second rate spin off from a spinoff from HP to one of the biggest and most profitable companies of the world (and one that is many times the size of current HP), is one of the most unusual mostly untold stories of the modern business world. It is a story of success (by Avago and Broadcom engineers and management) and incredible incompetence (by hp management that let them go for a pittance).

Re: Agilent 2000a / 3000a Oscilloscope NAND Recovery

#10

Post by jjoonathan »

hristov wrote: post #9

This is very interesting. I just have one minor nitpick. Broadcom did not buy Avago, Avago bought Broadcom. They then changed their name to broadcom as it was more recognizable in the industry (while keeping their old stock ticker AVGO as that was more recognizable in the financial industry). This is entirely a tangent but the rise of Avago from a minor second rate spin off from a spinoff from HP to one of the bigges…

Oh wow, I was just transplanting some TC702 amplifiers to save the doubler in an old 50GHz HP signal generator... would that have been designed by these guys back when they were part of HP?

https://www.keysight.com/us/en/assets/7018-04165/application...

EDIT: that's registration-walled, but this HP Journal article isn't. https://archive.org/details/Hewlett-Packard_Journal_Vol._42_... The amplifiers in question are blue-colored in the background, and the doubler that uses them is the spiritual successor to the rear-most golden module.

EDIT2: yep, the timeline lines up. The HP journals with these amplifiers were early 90s, and "This division became part of Agilent Technologies when HP spun off its test and measurement business in 1999. Later, in 2005, Agilent spun off its semiconductor products group, which became Avago Technologies. "

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