UTD2102CEL 100Mhz 1GS/s Digital Scope - Mini-teardown

[IanJ]

Hi all,

Curiosity got the better of me so I thought I'd take the lid off my UTD2102CEL 100Mhz scope and have a look.

But before I start, here's something I noticed......the Tenma 72-8705 scope is identical, so I guess Farnell are re-badge'ing UTD's......


Anyway, here's my mini-teardown:-

In operation on my workbench:


With the rear plastic cover removed:


Metal cage removed:


A bunch of internal shots:










Looking for the memory, there I guess on the underside of the main board:

[tinhead]

awsome IanJ, look complettly different than what i know (attached 2052CEL rev2.05) from UNI-T

what revision of PCB yours ? I wish you could shot and post bigger pictures.

Definitely better than the old revision, different FPGA, sample memory within FPGA instead of
external (or maybe on bottom side?), original AD9481 instead of these cheap ans noisy HWD9481.

What really crap is the PSU mounted right above ADCs/FPGA/DSP, not only because EMI or distortion
(look 4.jpg and the mains cap right above DSP, who the fuck desiged this?), but also because of pure security.

A piece of shielding between PSU and main PCB, like e.g. HanTekway is using, would not costs that much
and it would improve this scope.

[IanJ]

I have much bigger pics obviously, but have to be careful with the sizes I post as my domain is hosted on a 2nd DSL line.

Hmmm, you got me to thinking, I have some really thin aluminium plate so might build a small shield around the PSU, at least between the main board and the psu anyways.

Here's another couple of pics with pcb rev detail etc:-

[tinhead]

ok, v1.04 but the timestamp is everything we should know 2010.07.07.
So it seems to be a re-design (which they promised after some negative feedback from users)
and not just old model with new display (like the one which i posted).

I doubt there is enough space for aluminium plate, i would probably make a new PSU PCB, a bit longer (and with alu plate),
a piece of PCB didn't cost that much.

[saturation]

Great job, plus we get a good commentary from our forum DSO gurus, its priceless.

[Mechatrommer]

Great job, plus we get a good commentary from our forum DSO gurus, its priceless.

Tinhead is the only guru!

there is another. but he seldomly popped out.