DSOX2000 and 3000 series - licence , have anyone tried to hack that scope ?

[Howardlong]

BTW, what do you think about these C-L-R networks? Are they some kind of feedback paths? I don't think they are direct signal paths.

They are balanced filters, as opposed to single ended ones.

Also, did you notice difference in MarkL's 1GHz AA filter?

Hmm, that's a bit scary. It seems unlikely to be a simple upgrade to 1GHz in that case. 1GHz on a HiZ input is of little value, most high speed probing systems are 50 ohm.

They use a kind of parallel path C-R path in addition to usual LC ladder scheme.

It looks like it's just trying to boost the HF end a bit. What's nice to see is that they do what I do in these situations with lumped filters, model a reasonable attempt but leave plenty of optional pads for improvement after the spin for the real world.

[Howardlong]

Before I disassemble the scope and lift the shield again, can you identify all the parts you need to know?

Lifting the shield isn't hard but it's a bit fiddly and time consuming as the gap between shields doesn't leave much room to get a decent amount of localised heat on the mounting joints.

[memset]

Before I disassemble the scope and lift the shield again, can you identify all the parts you need to know?

Hmm, should I be greedy or conservative?
Please look at attached photos. Red dots are for possibly critical components, yellow it for just interesting.
Top layer: 5 red, 4 yellow.
Bot layer: 4 red, 3 yellow.
Fell free to discard yellow comps if that would take too much time.

Thanks in advance!

[TheSteve]

How are you starting the firmware, and what version? Do you have a LAN card so you can telnet into the unit?

ATM I don't have a LAN and my FW is 2.41.
I've never touched the software part yet.
I think I'll replicate most of the values from your photos on one of the channel and try to directly measure ASIC output bandwidth with another scope. I don't think the ASIC itself could be digitally controlled for BW limit.

I'm not too averse to desoldering to measure, I have a pretty decent E12 stock of Ls (WW as well as ML), Cs and Rs in stock if necessary. In the event of disaster, there's always another channel ;-)

Nice! You seem to have a great reverser's setup. Although I feel I maybe asking too much about desoldering.
I don't think inductors needed be measured since they are marked and you can tell their value by both marks and number of wire turns. But capacitors are real headache. I can't measure single pF's accurately.

BTW, what do you think about these C-L-R networks? Are they some kind of feedback paths? I don't think they are direct signal paths.
Also, did you notice difference in MarkL's 1GHz AA filter? They use a kind of parallel path C-R path in addition to usual LC ladder scheme.

I think you need to get a LAN card - you could then easily switch between 100 and 200 MHz bandwidth and probe to see where the bandwidth is actually changing.

[memset]

I think you need to get a LAN card - you could then easily switch between 100 and 200 MHz bandwidth and probe to see where the bandwidth is actually changing.

I expect to make a DIY board in a week.

[plesa]

WOW, thanks guys for this thread resurrection, quite amazing findings.

[tonyc]

How are you starting the firmware, and what version? Do you have a LAN card so you can telnet into the unit?

ATM I don't have a LAN and my FW is 2.41.
I've never touched the software part yet.
I think I'll replicate most of the values from your photos on one of the channel and try to directly measure ASIC output bandwidth with another scope. I don't think the ASIC itself could be digitally controlled for BW limit.

I'm not too averse to desoldering to measure, I have a pretty decent E12 stock of Ls (WW as well as ML), Cs and Rs in stock if necessary. In the event of disaster, there's always another channel ;-)

Nice! You seem to have a great reverser's setup. Although I feel I maybe asking too much about desoldering.
I don't think inductors needed be measured since they are marked and you can tell their value by both marks and number of wire turns. But capacitors are real headache. I can't measure single pF's accurately.

BTW, what do you think about these C-L-R networks? Are they some kind of feedback paths? I don't think they are direct signal paths.
Also, did you notice difference in MarkL's 1GHz AA filter? They use a kind of parallel path C-R path in addition to usual LC ladder scheme.

I think you need to get a LAN card - you could then easily switch between 100 and 200 MHz bandwidth and probe to see where the bandwidth is actually changing.

How do you switch from 100 to 200Mhz with a LAN card?

[plesa]

How do you switch from 100 to 200Mhz with a LAN card?

there are BW comandline parameters, for instance BW50 switch bandwidth to 500MHz.

[memset]

i have that file still localy and remote on hotfile

https://hotfile.com/dl/131446259/df706bb/3000XSeries.01.10.2011031600.cab.html

Do someone still have this file or url to download it?
Thanks!

[memset]

I have the 1 GHz version MSO-X 3104A and can take some pictures tomorrow.
May be that helps you.

Any news by the chance?

[HighVoltage]

Will try my best to get to it in the next two days

[memset]

Can confirm that this is definitely the case. There's a hardware difference.

Not sure if I have the right to ask, but I'll try 
What's the difference between factory and user calibration for 3000-series? Do I need to use high-grade BNC cables and fixtures for user calibration? How critical are they?

Are there any factory-only calibrations I can ruin so hard so user calibration won't help to recover accuracy?

[plesa]

http://www.filedropper.com/3000xseries01102011031600

[memset]

http://www.filedropper.com/3000xseries01102011031600

[HighVoltage]

Ok, I took my Agilent MSOX-3104A apart
Here are the pictures.
Is this what you are looking for?
Any details I need to look for?
Anything in detail that needs to be taking pictures of?

[HighVoltage]

more

[HighVoltage]

And more....

By removing the can, I think I lifted one of the ground pads.
Solderwick did not help to remove all the solder
I had to add some leaded solder to make it flow easier
Hopefully this is not a problem for the re-Assembly

[HighVoltage]

And here are some details from under the can.

[Wiljan]

For those who want to see how to disassemble the 2000/3000 and who want to some details on boards difference have a look in the part list in this pdf.

"Agilent 2000/3000 X-Series Oscilloscopes Service Guide http://cp.literature.agilent.com/litweb/pdf/75019-97038.pdf

[memset]

And here are some details from under the can.

Thank you!
Could you please confirm top marking on this SOT-23 device (see attachment)?

[HighVoltage]

More details

[HighVoltage]

Looking at my own pictures, I am surprised how many fibers are hanging there on the components.

[memset]

More details

Amazing! Thank you!
Looks like it would be possible to boost any board to 1GHz. This will require building of additional circuit around Teledyne attenuator relay.

[HighVoltage]

So, I can re-assemble my scope?
Or do you need anything else, while it is open

[memset]

So, I can re-assemble my scope?
Or do you need anything else, while it is open

Sure. I don't think anything else is needed.
Thank you very much for your help!