Scope WTF!

WTF is going on with my Rigol DHO800?
PART 2 for the thrilling conclusion!
• Scope WTF Follow-Up - ...
Plus a bonus lockup that recovered rather nicely.
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#ElectronicsCreators #Rigol

[@c1ph3rpunk]

Kick it, usually works for me. It also helps to use multiple kicks, separated by strongly worded, yet poignant, curse words. If that doesn’t work, you can always threaten it, telling it to shape up or you’ll install Windows 95 on it tends to work.

[@DiegoSpinola]

effective against HP printers of the era too

[@theelmonk]

Win95 ? Cruel and unusual punishment

[@spicemasterii6775]

Sage advice 🤣

[@chrisengland5523]

Some use that technique on wives, but that tends to have undesirable side effects.

[@IanScottJohnston]

Have had similar issue a couple weeks ago on my 3245A with cheap BNC connector cables not gripping enough on the centre pin. Bought some quality ones fault fixed.

[@mostlypostie1]

Yep, it's incredible how bad some BNC connectors/cables are. I see this a lot in my lab. My new Siglent scope HATES the cheaper pre-made (AliExpress) BNC connectors I had. I made my own cables with quality (Pulse) BNC connectors. Problem solved.

[@EEVblog2]

Follow-up video uploading now, it's NOT the Rigol DHO800 kzbin.info/www/bejne/nGaboqKveKqHd6c

[@anthonywilliams7052]

OK, then I'm going to predict it's either the connector or something else on the desks that felt the vibration at 0:21 and 2:52 BNC moving.

[@michaelmoore7975]

I predict it was a Kookaburra nearby.

[@WacKEDmaN]

weird...maybe theres a weird grounding issue with the front end socket... like its not screwed down all the way (you tore this one down didnt you?) and ground/shield is intermittent...

[@EEVblog2]

Possibly. More fiddling required.

[@SystemX1983]

Now we know what DHO stands for: Digitally Haunted Oscilloscope 😁

[@martinkuliza]

Definitely.. I ACCEPT THAT AS AN A FORMAL INDUSTRY TERM :P and then..... you have this mystery i'ts an 814 so if you ad 8+1+4 You get 13 Coincidence ?? Probably not but then if you take the 3 and double it you get 6 and then if you repeat that......... 3 times, (is that also a coincidence).... You get 666 Now, i don't know about you but that's freaking me the fuck out LOL

[@SystemX1983]

@@martinkuliza so the spikes in the signal are actually needles, torturing the user? 😁

[@martinkuliza]

@@SystemX1983 Correct and when it hits a certain frequency it summons the Cenobites from HellRaiser from the underworld but instead of - Pinhead - Chatterer - Butterball - Deepthroat The scopes summons - Breadboard - Signal Noise - Deep Memory Depth - I have nothing for butterball LOL and when they arrive THEY'LL TEAR...YOUR SOUL.....APPPPPAAAAAARRRTT

[@SystemX1983]

@@martinkuliza that really sounds bad. I think I'll stick with an old analog HAMEG instead 😄

[@der.Schtefan]

I mean, the scope just tried to fit the waveform to the broken lines of the DHO logo.

[@emilcost8613]

I bought a DH804 yesterday. After all night fiddling with it, finally went to bed at 6am. This morning I gave it another try and was so frustrated I retuned it. Life is to short to be mad at dodgy software and cost cutting of these fancy looking anxiety machines. I'll stick with my ten year old two channel.

[@BaconbuttywithCheese]

As a repair tech, be honest, have you had it apart? Hmmm... 🤣

[@KeritechElectronics]

...before turning it on? :D

[@BitCounter]

As long as you do not have any spare parts leftover when you put it back together.

[@anthonywilliams7052]

At 0:21 the noise came back when you hit it with your hand. Maybe a lose BNC or internal shield not soldered correctly? At 2:52 when you touched the BNC too... Lose BNC or improperly soldered BNC or something connected to it mechanically/electrically?

[@PoLoMoTo2]

That's what I thought, also seemed like it happened most when he pushed the BNC up though it's hard to really tell when exactly he's pushing it so that could be completely wrong. I don't think it could have been damaged by him trying to get the mainboard out at first without unscrewing the BNCs, really didn't look like he pulled that hard but that's the only thing I could think of other that a design detect like you mention.

[@anthonywilliams7052]

@@PoLoMoTo2 His next video showed it was the BNC T connector.... CALLED IT! Need real silver or better gold plated connectors with tighter tolerances.

[@PoLoMoTo2]

@@anthonywilliams7052 you did! Damn Murphy throwing a wrench in it making it not show up on channel 2 and the siglent at first lol. Glad it wasn't the rigol, I'm thinking about getting one 🤣

[@xani666]

Dave has slapped the jitter out of the clock

[@joetoney184]

Probably a bad Tee only on the scope side or the mating surface between bnc on scope and Tee

[@MarkPalmer1000]

Yes. Why not check a direct input to it with the modulated envelope before smacking the instrument or stating the WTF manufacturer name.

[@KeritechElectronics]

"Any sufficiently advanced technology is indistinguishable from magic" as Arthur would say. And I thought it was some cold joint, then intermittent connection on internal shielding, then cables, then BNC connector on CH1...

[@MartinE63]

Turn it on, don’t tear it apart

[@v.b.1544]

maybe supply problem? are these scopes plugged in to the same socket? once the charger for my smartphone in the same socket as the oscilloscope made a lot of noise

[@rayc1557]

Did this start happening after the tests with removing the fan and overheating until it locked up?

[@sergivaschenko]

Connection issue, no worries.

[@danman32]

My Rigol 1024z had the same high frequency spikes scoping an AC current measuring coil on my APC PDU. I blamed my circuit having noise but after seeing this, not so sure.

[@mrelectronicauy]

Is it properly Earthed with provided banana wire? if it is not , it is being grounded from the BNC , and that noise must be from the power adaptor being grounded from input C power to Mains ground of your bench apparattus .

[@mineown1861]

Smacking the side of the box always worked for my dad when the TV did that. I seem to remember swearing at it helped too , apparently.

[@joehubler4965]

try a different "T"

[@maniacaudiophile]

Put some deoxit on your connectors? Or maybe bad solder joints inside the scope on the BNC Jack

[@liamkenny100]

Is this from the fan upgrade, possibly unshielded fan. Just a thought

[@dayworkhard]

remember the PCB in the back for these 4 channels are different. CH1, CH2, CH3 and CH4 will have different noise coz the print of PCB

[@pobbel7897]

Passive intermod?

[@complexity5545]

So are we buying these DHO or waiting for a new batch? The solder or grounding on the BNC must be wonky. So are we buying? I want to use it as portable with a battery over that USB C connector. Could that C connector absorb interference? And are we buying these?

[@mast3rbug]

Do you still recommend this scope or the 1054z is better? IMHO, I will keep my 1054z.

[@vincei4252]

Must be that broken warranty sticker (jk)

[@merakrut]

This reminded me of when I was young. I got a TV as a birthday present when I turned 58 ,I had to kick it and slap it hard to make it work. However, that was back in 1953.

[@willynebula6193]

Well I'd be all over the shop too if someone was playing with my front end like that!

[@v.b.1544]

Now I have reached the error window moment) Well, one GW Instek at one time frayed a lot of my nerves by suddenly starting to do calibration and other rituals similar to yours when I was examining the oscillogram. Updating the firmware to the latest one, which was several years old :) did not help. I hope Rigol fix this.

[@peterhemmings2929]

Ignoring the noise, is there any way to set sensible triggering on an AM type signal like this?

[@theelmonk]

It still requires careful tuning but trigger holdoff will help set the retrigger time to be an integral multiple of the input frequency so that it retriggers at the same point. But I guess what you really want to do is demodulate and trigger on that.

[@kyoudaiken]

The message box is just Bugdroid doing Bugdroid things.

[@reedreamer9518]

Hit it with a bigger hammer!

[@GeoffHou]

Is this the scope that overheated in the fan experiment?

[@marcreynolds7948]

Interference from mobile phone pinging local towers? Does CH2-4 also have the issue?

[@xm07]

looks like SMPS interference where BNC gnd looses good connection (ground loops).

[@david300m]

Regardless of the price of the tool, always question the results. :)

[@Ghostpalace]

microphonic frontend? By the vibrations?

[@naftilos76]

Dave, your pattern is wrong. Push the stop button, investigate the spikes frequency and pattern and start hitting 180 deg out of phase!

[@franke5478]

Could anybody check the Zynq has a set software fuse which prevents the FPGA for loading a new firmware other than from Rigol? Otherwise it would be possible to write a open source software for this oszilloskop

[@drkastenbrot]

possible yeah, realistic no

[@naikrovek]

keep saying "what? what? what? what? what? what? what? what? what? what?" please. it really adds value to the content.

[@ajingolk7716]

Its the cause of that😅

[@mdavidhandler]

Let me guess, bad cable.

[@herbward5240]

I stopped buying loose crappy BNC fittings from Amazon and now only buy Amphenol fittings from Mouser

[@hedgie9357]

Hmm... Definitely break-through but quite early release for Rigol...

[@robinsonsoto8471]

Let's analyze the facts. The signal looks like Amplitude modulation. Dodgy connectors, other scope is fine. You either created the issue on the scope or it is a faulty. Did you check the firmware. ?

[@timturner7609]

Strikes me as a dodgy connector. Either the bnc on the scope or your T connector

[@8o86]

yes shoddy probe users can relate

[@calholli]

Definitely the T

[@SeanBZA]

Likely the heatsink/shield has a tint bit of oxide on it, ans this made it float over the input section. Strip down, and polish the edges where it surrounds the input section, and this should fix it. Or the input has a cracked trace right by the input soldering, probably where the large input pin connector joins to a thin trace leading to the input relays. Scope software restarting immediately is simply an app setting, set so it will always be run by the android system, even if it crashes, it will immediately be restarted, like all phones will restart Google services if they crash, just with a blip on the screen which you will barely notice unless looking.

[@EEVblog2]

It's just a dodgy BNC T piece.

[@SeanBZA]

@@EEVblog2 You still have Arcnet T pieces around like I do, and the termination resistors?

[@button-puncher]

@@EEVblog2 Experienced the same thing recently. Even ordered from Digi-key and still got a bad batch of tees. I'd expect that from AMZN but I guess when everything is made in China, sadly, it's what is to be expected these days. Happening frequently with car parts too. New parts that fail quickly after install.

[@SubTroppo]

Clearly you need me to come and whack it like I did with old monochrome TVs in my childhood back in the nineteen-sixties. ps I had a HDMI cable go bad recently; it hadn't been moved in years (what the...?)

[@oliverer3]

Is this the one you put the fan in? Thinking maybe some piece of shielding got out of whack? Edit: NVM 😅

[@oldman1944]

Bad BNC on Ch1 looks likely

[@JuanJDumeP]

Dave that's a fish finder. You are seen a fluke literally

[@ovalwingnut]

I believe this is a "feature" of the Ultra Vision... Just saying ;O)

[@iamdarkyoshi]

More calibrated persistent tomfoolery required.

[@ArtVanAuggie]

Is it WOW, Woah, or What?

[@dalewheat]

You didn't take your scope APART, did you? :D

[@Misigun99]

Now Rigol has become the fancier version of FNIRSI

[@calholli]

Or he just has a loose BNC T.. and needs a new one.

[@TheChrisey]

Looks like a bad shielding ground connection

[@jeffm2787]

Fan you installed...maybe.

[@johnshaw359]

You could try channels 3&4.

[@calholli]

It was fine on channel 2

[@michaelmoore7975]

Is there a Kookaburra nearby?

[@Digital-Dan]

It's just God playing dice with the universe.

[@Xaelloss]

"Your scope is not responding. Would you like to report about it to Google?"

[@calholli]

"Application failed successfully. Reporting home with all your data now. stand by

[@PeterPilgrim-qr6pi]

Mr Drama. Figure it out and get back to us.

[@simonpritchard472]

Absolutely nothing to do with you having taken it to bits, of course...

[@calholli]

no

[@shazam6274]

Crappy "T" BNC Adapter and perhaps loose ground internally.

[@Magic-Enlightenment]

Ghost 👻in the machine

[@spicemasterii6775]

The old multimeter reviewer Dave Jones would've said: what a heap of absolute $#!%

[@SergiuCosminViorel]

Not enough Chinese devices in that box

[@larry785]

Your T adapter is BNC, your scope is BNC, the cables are probably made in china

[@robvandeschepop8595]

Just throw away the T connector!

[@lazymass]

Its running Android? That's kinda cool

[@NutSure]

Bad luck 😅

[@PhilipvanderMatten]

TIL scopes can run on android

[@pie314isi]

weird aliasing?

[@ericastier1646]

We all knew Rigol is a sub quality brand even though they fool people with a clean the front panel buttons layout, they know 80% of buyers are fooled by appearances. Eventually the inners show their sub optimal and cheap design. No surprise here !

[@supercompooper]

Copeoscillos scilloscipeo loscopeoscil ...

[@dummyload5648]

😱

[@brightquark]

looks like aliasing from a much higher freq than nyquist of oscilloscope sample rate

[@IvanKowalenko]

You need to hit it with a bigger hammer.

[@VorpalGun]

Wasn't this the scope that you overheated when you experimented with fanless? Didn't you even say it smelled funny?

[@calholli]

she cooked

[@akosbuzogany2752]

Try and translate "rigol" from french and stop wondering.

[@kaybhee6]

new ways to crash.... typical rigol

[@PeterPilgrim-qr6pi]

waste of time

[@opablo_gm]

I'm not an EE and I see the simplest issue in the world.... I simply faulty connection.... why all the drama and esotericism ?