E-bay crap! - Page 1
Forum section: electronics / testgear

author: JacobIsHere
author_rank: Contributor
timestamp: April 08, 2015, 10:16:03 am
content: I was looking on E-bay for tektronix analog oscilloscope and i found this!http://www.ebay.com.au/itm/Digital-Oscilloscope-0-200KHz-1Msps-Analog-Bandwidth-1Msps-2-4-LCD-TFT-STM32-/251770232698?pt=LH_DefaultDomain_15&hash=item3a9eacdf7is it out of an real Oscilloscope or is it home made???(sorry if i put this in the wrong placeI'm new to Forum)

author: smjcuk
author_rank: Frequent Contributor
timestamp: April 08, 2015, 10:25:27 am
content: Its real but not very good. It's basically an ADC and a microcontroller with a pretty screen.

author: JacobIsHere
author_rank: Contributor
timestamp: April 08, 2015, 10:30:44 am
content: thank you for the feed back! i'll save up and buy a real one

author: smjcuk
author_rank: Frequent Contributor
timestamp: April 08, 2015, 10:36:07 am
content: Yes please do

author: george graves
author_rank: Super Contributor
timestamp: April 08, 2015, 11:35:12 am
content: Quote from: JacobIsHere on April 08, 2015, 10:16:03 amWelcome to the hobby/obsession....Me thinks you should never shop for something alone. O0Check out Dave's video on setting up a lab.]https://www.youtube.com/watch?v=R_PbjbRaO2E

author: Fungus
author_rank: Super Contributor
timestamp: April 08, 2015, 12:12:53 pm
content: Quote from: JacobIsHere on April 08, 2015, 10:16:03 amIt's real...But it looks horrible to use and is very low bandwidth(you can only look at signals up to 200kHz - almost useless for electronics engineering).

author: McBryce
author_rank: Super Contributor
timestamp: April 08, 2015, 01:36:27 pm
content: Real, but in my books it comes under the heading "Toy".McBryce.

author: rdl
author_rank: Super Contributor
timestamp: April 08, 2015, 07:33:46 pm
content: Just be careful. It's easy to fall victim to EAD. I've seen more than one instance of it on these forums this year.http://www.nutsvolts.com/index.php?/blog/post/starting_out_avoiding_the_equipment_acquisition_disorderA cheap oscilloscope is probably better than none, as long as you know how to use it.

author: electr_peter
author_rank: Unknown
timestamp: April 08, 2015, 07:48:40 pm
content: For added fun factor, one can buy DIY kit version of this scope:http://www.aliexpress.com/item/DSO138-Digital-Oscilloscope-DIY-kit-stm32-parts-oscilloscope-1Msps-200KHz/32285379424.htmlI would recommend to get Xprotolab (instead of scope in first post) - 2 channel, signal gen, basic LA, full control from PC, very small, can be battery powered.http://www.gabotronics.com/development-boards/xmega-xprotolab.htmThese toy scopes are only good for learning basic concepts with audio and batteries. Very difficult to use and understand what is going on with the signal. Buy real scope (bench, handheld or PC based) instead - much better value.

author: McBryce
author_rank: Super Contributor
timestamp: April 08, 2015, 09:42:49 pm
content: Quote from: rdl on April 08, 2015, 07:33:46 pmThere's a vast difference between EAD and buying a steaming pile of ebay chinese sh... Nobody's saying he should buy an Agilent Infiniium 90000 Series instead. But he should at least know that this thing won't fulfil even the basic requirements.McBryce.

author: dadler
author_rank: Unknown
timestamp: April 08, 2015, 09:49:36 pm
content: Quote from: rdl on April 08, 2015, 07:33:46 pmThis forum causes EAD/GAS.

author: smjcuk
author_rank: Frequent Contributor
timestamp: April 08, 2015, 09:54:03 pm
content: It does and it's painful. My manky old scope died about a week ago and I've spent a week in analysis paralysis looking for old Tek stuff to replace it with. For my needs any piece of junk analogue dual trace thing with 30-60MHz bandwidth is fine but nope, here I am looking at things my wife will murder me for buying.

author: tszaboo
author_rank: Super Contributor
timestamp: April 08, 2015, 10:08:37 pm
content: "Accuracy : 12Bit"A specifications, you gotta love them.

author: Chipmunk
author_rank: Contributor
timestamp: April 09, 2015, 09:02:12 pm
content: At that price, that thing would be ok for doing audio work, I guess... maybe built into a mixing desk for 'the prettiness'. But as an actual piece of test equipment... LOL

author: timofonic
author_rank: Frequent Contributor
timestamp: April 09, 2015, 09:20:06 pm
content: Quote from: smjcuk on April 08, 2015, 09:54:03 pmMe too!I don't have the money and I still look at it instead studying. It's a shame, going to study right now.

author: smjcuk
author_rank: Frequent Contributor
timestamp: April 09, 2015, 10:00:07 pm
content: Good luck with the studyingJust grabbed my new scope: Tek 453. Probably 45 years old but that's fine