I think I have an explanation for the unpopulated BGA chip, based on my wandering in the firmware : it's a FPGA tagged "usb retriever", used to support High-Speed USB decode. So the chip has to be standard in the 1.0GHz and 1,5Ghz versions, and not present in the lower bandwidth versions. Btw, the low/full-speed USB decoding seems not to use this dedicated FPGA : only the main FPGA is used.
The connector at 2:45 will be for the 50/60Hz mains line trigger via by the opto-isolator at 20:45. Mike shows this in his teardown of his 6000 series scope (v=5lYbD9_eIko at 6:05).
Since the scope can accept voltages over a huge range (100s of volts down to millivolts), you need some circuitry to convert that range to the narrow range (often +/- 2V or so) for the A to D converter chips. An analog front end is a collection of attenuators, switches (relays or MUXes), and amplifiers which accomplish this task.
Maybe they're proud of their work - inside as well as out? They may also be proud of the fact their device can be safely disassembled to be repaired if necessary (at $20k+, you'd sort of hope so).
The chip near the front panel USB connectors is a Renesas uPD720114 4-port USB 2.0 hub. Also the the touchscreen is connected using USB, so probably all USB connectors and the touchscreen go trough the hub.
Can I have it? I have no scope :). I'm to electronics and learning a hell of a lot from Dave. The circuitry on this scope is A.) mind blowing and B.) extremely interesting!!! Thanks Dave.
I believe that unpopulated BGA between the ADCs is populated in the 6000X series which also uses MegaZoom IV and should be the same form factor as the 4000X series. The 6000X series has better sampling rate (20G vs. 5G per channel pair) but lower update rate (450k max. (135k default) vs. 1M). Interestingly, the front end is always >6 GHz capable, all bandwidth upgrades should be licence key only.
If they already use a 10 MHz reference internally, why in the world do they not offer an input for an external 10 MHz reference input? That's a feature I have been missing in oscilloscopes for a while. Most of test gear has 10 MHz reference inputs, just the oscilloscopes don't.
@EEVBLOG having had an accident with my Samsung galaxy s III, I chucked a new screen in it and was horrified to see that it's one big lump of glued together engineers nightmare.... but can you explain how they make the AMOLED displays.
I just watched another video and the same tune was playing. I took a sample of the the tune and stuck it in Audacity, slowed it down and I think its the Indiana Jones tune.
I think I have an explanation for the unpopulated BGA chip, based on my wandering in the firmware : it's a FPGA tagged "usb retriever", used to support High-Speed USB decode.
So the chip has to be standard in the 1.0GHz and 1,5Ghz versions, and not present in the lower bandwidth versions.
Btw, the low/full-speed USB decoding seems not to use this dedicated FPGA : only the main FPGA is used.
The connector at 2:45 will be for the 50/60Hz mains line trigger via by the opto-isolator at 20:45. Mike shows this in his teardown of his 6000 series scope (v=5lYbD9_eIko at 6:05).
Since the scope can accept voltages over a huge range (100s of volts down to millivolts), you need some circuitry to convert that range to the narrow range (often +/- 2V or so) for the A to D converter chips. An analog front end is a collection of attenuators, switches (relays or MUXes), and amplifiers which accomplish this task.
Very interesting to see. A bit out of my price range but still fun. Thank you.
The fan is not only cooling the PSU but the A/D converters and processors
Maybe they're proud of their work - inside as well as out? They may also be proud of the fact their device can be safely disassembled to be repaired if necessary (at $20k+, you'd sort of hope so).
As noted in the video, standby consumption is about 2W.
The chip near the front panel USB connectors is a Renesas uPD720114 4-port USB 2.0 hub.
Also the the touchscreen is connected using USB, so probably all USB connectors and the touchscreen go trough the hub.
correction: the 350Mhz model can be upgraded to 500Mhz in software, so seems like they share the same font-end
AD633 is 4 quadrant precision multiplier.
I guess there was an embargo on it before today ... right Dave?
yay the video speed-up whistle is back..
Can I have it? I have no scope :). I'm to electronics and learning a hell of a lot from Dave. The circuitry on this scope is A.) mind blowing and B.) extremely interesting!!! Thanks Dave.
this is just awesome
I believe that unpopulated BGA between the ADCs is populated in the 6000X series which also uses MegaZoom IV and should be the same form factor as the 4000X series. The 6000X series has better sampling rate (20G vs. 5G per channel pair) but lower update rate (450k max. (135k default) vs. 1M). Interestingly, the front end is always >6 GHz capable, all bandwidth upgrades should be licence key only.
If they already use a 10 MHz reference internally, why in the world do they not offer an input for an external 10 MHz reference input? That's a feature I have been missing in oscilloscopes for a while. Most of test gear has 10 MHz reference inputs, just the oscilloscopes don't.
Hi Dave, if you could take apart any electronic device in the world , what would it be?
So what's the damage for one of these puppies?
Taking apart something new that you just bought, EPIC, I do the same :) All the time.
so when you first started doing the blog did you ever think you'd be tearing down an agilent 4000 series.
FAN-tastic! Had a good laugh there.
Not really no. These are used for repairs, so surely the user if competent to merely disassemble the unit it's self.
Christmas is early this year...
@EEVBLOG having had an accident with my Samsung galaxy s III, I chucked a new screen in it and was horrified to see that it's one big lump of glued together engineers nightmare.... but can you explain how they make the AMOLED displays.
What is the black and white space-age microscope looking thing in the right at the start of the video?
I wonder if those guys have a heart attack every time they see you tear one of these things apart.
How many layers is that pcb?
I just watched another video and the same tune was playing. I took a sample of the the tune and stuck it in Audacity, slowed it down and I think its the Indiana Jones tune.
They probably already got used to it.
What is an analog Front end?
It's a Mantis microscope. He talks about it in other videos.
No, not here.
What is the minimum amount of watts needed to fly to the moon, I wonder? :)
If they don't like why would they send him sample units? Videos of a guy bigging up the insides of their stuff can't be bad.
I need a new scope. My 3000X is getting old.
FAN-tastic! (No pun indented!)
Fly to the moon on 2W ?
Yeah, but WHAT is he whistling? Doesn't sound like dixie...
Its Dave's Mantis Elite Microscope see video #332 v=PlAXAuco8gs
I think that was a little ironic :D
but yeah daves videos are great! verry informative!
but sometimes a little bit too long :S
... watch the video and find out! :D
I'm also to electronics.
Yes :P
7000$?
Oh my GOD! I know it's excelent quality but, this way I will never afford this... :(
i really hope it's Nyan Cat...
i don't know why anybody trusts him with anything valuable
Such a beautiful machine, I want to make love to it.
So what's the damage for one of these puppies?