Scope WTF!

WTF is going on with my Rigol DHO800?
PART 2 for the thrilling conclusion!
Plus a bonus lockup that recovered rather nicely.

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#ElectronicsCreators #Rigol

[emilcost]

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.

[cphrpunk]

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.

[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.

[anthonywilliams]

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?

[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...

[naikrovek]

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

[herbward]

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

[joetoney]

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

[SystemX]

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

[BaconbuttywithCheese]

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

[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 .

[naftilos]

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

[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...

[xani]

Dave has slapped the jitter out of the clock

[danman]

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.

[mineown]

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.

[v.b.]

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

[maniacaudiophile]

Put some deoxit on your connectors?

Or maybe bad solder joints inside the scope on the BNC Jack

[complexity]

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?

[robinsonsoto]

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. ?