EEVblog #1004 - Owon XDS3202A 14bit Oscilloscope Teardown

Does the Owon XDS3202A Oscilloscope use a true 14bit converter?
Hires photos:

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[GhostOfJulesVerne]

Not related to this specific video, but Dave, because of your videos I finally figured out how to use a bipolar transistor after 10 years of frustration. Thank you! Now on to mosfets and the 555!

[linkboy]

Out of everyone of my Youtube subscriptions, you update the most frequently, thought you should know that. Love your videos. Thanks.

[BenjaminGatti]

what you call weird is an airflow channel, meant to preserve flow when against a wall or set flat on a table.

[antoineroquentin]

The antenna on the mains socket is probably the best they could do. A microstrip antenna on the PCB would have a bad ratiation pattern because of the close ground plane. So it's the furthest point from the ground plane. A half wave dipole would be better of course ;)

[mdng]

Re: custom oscillator, I'm willing to bet the parts sourcer found that bodge + Chinese labour to be cheaper than the spec'd part.

[charlesdorval]

Could the 5.5v be to allow headroom to use some very low drop out 5v linear voltage regulators ?

[gregfeneis]

At 6:53, I bet with a little experimentation, they figured out a way to couple their wifi to the mains cord for better reception. I'm not a radio guy by a long shot, but I've taken apart enough clock radios to know that's how it's done. In general, table top AC powered radios usually have some coupling between the radio antenna circuits and the AC power cord to improve reception and in some cases not need a telescoping antenna.

[khronscave]

5:33 Those aren't no-name! Those are top of the line... sorry, i meant top of the (junk) heap CapXon KM! Ah, there went another typo - C-R-apXon...

[faridsafazadeh]

OMG. You are amazing. Never seen reviews like yours. You are just great in what you doing. Thank you so much for sharing...many many thanks!

[cmuller]

They released it at $1400 so they can sell it with a 50% discount. Customers will think it's a great deal and owon will still have a nice margin...

[samgab]

8:55, looks like cold solder joints on the Common and V input jacks? If so, those'll crack and fail in due course.

[crocellian]

Another snide review.

I was impressed that all the EEVBlog stories about Owon lying on specs were false.

[AAAyyyGGG]

Hands up those who can clearly see the fan "airflow" arrow at 10:31 (pointing upwards) while Dave blathers on about how badly designed the airflow is... I wish he would check his facts before he belittles the design engineers so much...

[tejas]

dave, just want to say thanks. i have an interest in electronics but never built or acted on it. because of your awesome videos i brought my first soldering iron and an intro to electronics kit today

[bborkzilla]

For observing really low noise signals I use my Tektronix 5103N. It's not digital, it's kind of heavy and it has no real storage capability. But it only cost $20.

[brutester]

Dave, there is a fuse on cable connector, so having a second on board makes no sense

[GautamKumarGoswami]

So far I can remember, initial Owon DSOs were really 'not ok' inside, but now they have improved a lot excepting some passive components which could easily be replaced by renowned makes. Considering price points, Owon really a charming performer & surely they will improve more - here I am confident, though I am not much confident about Dave's attitude towards Owon!!

[hikemoncho]

Check out that burn mark on the C624 connector at 17:56. Chinese quality control at it's finest.

[zaprodk]

17:14 what's going on with missing the R139 & R140 and flux residue - someone reworked the board ...

[Chriva]

Aren't those antennas taped on? Kinda scary place to put it.. :O What happens when the adhesive dries up as it usually does?