EEVblog #360 - Rigol DS2000 Oscilloscope Teardown

Forum Topic:
Teardown Tuesday.
What's inside Rigol's new DS2000 series entry level oscilloscope?

EEVblog Main Web Site:
EEVblog Amazon Store:
Donations:
Projects:
Electronics Info Wiki:

[mikeselectricstuff]

regs near front end - maybe seperate linear regs for clean supply to analogue bits.

[EEVblog]

They are just (low noise?) linear voltage regulators. Powering some or all aspects of the front end circuit. They needed something like this to enable the 500uV/DIV range.

[djkelectrical]

About those hidden chip numbers, a friend of mine who manufactures bonding solutions tells me he has a customer in the electronics business who uses a special solution to bond stuff to chips to conceal their identity. Apparently it's so strong that once treated you've got more chance of destroying the chip than getting the darned number off it. Looks like technology progresses everywhere, I can remember when numbers were just dremmelled off.

[AlexForencich]

The ones in the power supply? Those are part of the feedback path for the switching controller. The switching part of the supply has to be isolated from the output, so either the switch control signals or output voltage feedback has to be sent across the galvanic isolation in the supply for it to work properly. Every isolated line powered switching supply has at least one. Looks like this one has 4, though I am not sure why. I presume one of them is for the AC line trigger.

[Mark]

My Rigol equipment has been stellar.
They have been doing everything right and if they keep it up I can see them competing directly with the big boys. I have two pieces of rigol gear and I am considering a third.

Obviously no competition from that DSO you reviewed the other day :)

Great review as always.

[EEVblog]

Yes, I think I've seem something similar somewhere, but cannot recall.

[Monkeh]

I love the Torx screws everywhere. Most of those isolation slots on the PSU probably aren't even required, but they've put them in because they're doing some anyway. Good approach.

[EEVblog]

The 70MHz version is US$839 retail. The 200MHz unit is identical hardware wise.

[EEVblog]

They are calculated based on the required impedance and type of material used.

[EEVblog]

I found the same match. The Rigol is 2GS/s though. But I'm pretty certain this would just be relabeled off-the-shelf chip. There are suitable ones on the market, so you'd be crazy to spend huge $ rolling your own.

[EEVblog]

Kickstarter project! After-market clear covers for test gear! Fluke did this with a special edition of the 87-V for example.

[IndustrialGoblin]

You know, there's a Dave's Law - When you already want to go to bed, Dave uploads new video.
It's the LAW, and you can't do a sh#t about it! ))

[DougWickle]

I've yet to watch more than a few seconds of the video but I'm giving it a thumbs up based on the doc brown license plate in the background alone.  GREAT SCOTT!!!

[WhitentonMike]

No kidding?! Sweeeet. They should be really proud of their work. Too bad it is rarely seen.
Kickstarter project is a great idea. I've been in IT for many years and lost touch with the electronics test gear market. I'd crash and burn but somebody should seriously do it. These engineers really need their work showcased.

[EEVblog]

It's the Extech MC108 digital microscope, as you saw in the video. Pretty useless for most things, but pretty good for looking at part numbers on chips. In this case it didn't work so well because the metal shielding can got in the way (it needs to be right on top of the chip).

[mikeselectricstuff]

Sticky cable tie bases ALWAYS fall off eventually.

[Tutoelectro]

Awesome work a 3:14 :) I almost didn't notice!

[EEVblog]

Possible, yes. Trivial? No idea, no one has done it.

[WhitentonMike]

Dave, when you took the back cover off my first reaction was, "Why the hell did they put that ugly plastic cover over such a beautiful full metal shield?" Makes me want to do a couple of mods and show it off. 1. Powder coat the shield. 2. Silk screen on a large Rigol logo. 3. Vacuform a clear acrylic shell to replace the plastic cover.

[iTXS]

IMHO there is a little error in pcb design of clock provider unit for Rigol's custom ASIC (14:30). Most of AD's clock synths requres perpendicular positioning for its two LC's (on screen) circuits - for decreasing inductance coupling between L's.