chinese  oscilloscope jds2012a  teardown  - Page 1
Forum section: electronics / testgear

author: jimanis
author_rank: Newbie
timestamp: July 09, 2015, 07:26:37 pm
content: hello and sorry for my English...this is inside of this Chinese oscilloscope ... on the ic they have delete the codes..

author: Lightages
author_rank: Unknown
timestamp: July 09, 2015, 08:30:55 pm
content: Thanks. But you forgot an image of the assembled unit so we know what it looks like.

author: frenky
author_rank: Unknown
timestamp: July 09, 2015, 08:40:46 pm
content: Quick search finds this:

author: ataradov
author_rank: Super Contributor
timestamp: July 09, 2015, 09:07:55 pm
content: Well, who does not want a "fully functiognl" scope for "the use of safe"

author: Deathwish
author_rank: Unknown
timestamp: July 09, 2015, 09:23:21 pm
content: Quote from: ataradov on July 09, 2015, 09:07:55 pmMeh, try Dave our host for getting into his one.

author: JoeB83
author_rank: Regular Contributor
timestamp: July 10, 2015, 04:12:52 am
content: Quote from: ataradov on July 09, 2015, 09:07:55 pmFully function + gl.Id also like to know what "multi-usaage" is.

author: JoeB83
author_rank: Regular Contributor
timestamp: July 10, 2015, 05:39:44 am
content: Plus it looks like it charges from the same charger my Canon SL1 DSLR charges from.....

author: Rasz
author_rank: Super Contributor
timestamp: July 03, 2017, 03:13:18 pm
content: Good news everyone! Jinhan also makes dual channel version of this glorious beast, JDS2022A.Teardown:25MHz sine:$140 free shipping.2x AD9288 + some FPGA/CPLD, based on the scratch marks either Lattice cpld or Altera Cyclone 2? + some ARM micro + 320x240 LCD. Not bad for the price, might be useful after hacking as a cheap PC analog input.

author: LogicalDave
author_rank: Regular Contributor
timestamp: September 03, 2017, 12:34:31 pm
content: I purchased the JDS2023 that has two channels and includes a 5MHz signal generator.I tested it quickly using a lab-grade RF signal generator and confirmed the 20MHz bandwidth specification; it clearly shows at least 10 points per cycle of the sinewave (validating the 200MS/s specification) and there is no amplitude compression of the 0dBm signal (nominally 0.632vpp into a 50-ohm load – this is unloaded so it correctly shows 2x vpp); the analog front end 3dB compression point is somewhere north of 40MHz.

author: 001
author_rank: Super Contributor
timestamp: November 11, 2017, 09:02:46 am
content: It can make "screenshots" only? PC integration only as flashdrive with screenshoots, isnt it?

author: Rasz
author_rank: Super Contributor
timestamp: November 11, 2017, 05:13:07 pm
content: apparently it can make 6 screenshotshttps://translate.google.com/translate?hl=en&sl=ru&u=https://mysku.ru/blog/china-stores/47181.html

author: cliffyk
author_rank: Frequent Contributor
timestamp: May 30, 2019, 12:23:13 am
content: Hello all,I realise this is an OLD thread, however I just purchased on of these 'scopes (from Amazon, $150.00) to sort of replace my old OWON HDS1022M-N which died an untimely death when its plastic outer case decided to disintegrate in my hands (it's listed on eBay for parts,the battery, display and boards are all intact and OK).The OWON was nearly $600 when i bought it in June of 2009--this guy is close to its equal, at 1/4 the cost--though i do miss the FFT and waveform averaging functions the QWON offered. The unit I received (claimed to be "new") was apparently produced in July of 2017, anf differs from all that I have seen in it's control button labeling--mine has hybrid Chinese/English legends on the function buttons. THe supplied documentation sucks, apparently machine translated from Chinese; but with some fiddling and a basic knowledge of handheld DSOs it's not the difficult to figure out.I also found that the dual battery box had intact terminals for the "spare" cell (unlike some i had seen on YouTube and elsewhere); so I jumped it to be in parallel with the live cell. As the instrument does not attempt to charge the cells I saw no downside to this, and now enjoy 8-10 hours of use from a set of cells...envision their being jumpered:My one significant impression is that this is a real test instrument, designed to be such; not some flahey 200 kHz hobbyist level, overworked micro-controller/FPGA based toy like so many others in its price range...

author: ebclr
author_rank: Super Contributor
timestamp: May 30, 2019, 01:17:53 pm
content: "Well, who does not want a "fully functiognl" scope for "the use of safe""Try to write this in Chinese, and let see if you do any better.Don't be xenophobic

author: tkamiya
author_rank: Super Contributor
timestamp: May 30, 2019, 03:20:17 pm
content: The green solder mask look awful, especially near CPU.Are the gray stuff heat sink compound or so that no one can copy their design???

author: sdouble
author_rank: Frequent Contributor
timestamp: May 30, 2019, 07:11:42 pm
content: I'm not a native english speaker.but this is clearly a blog where people communicate in english. I did find that people here are rather understanding with any sort of mistake. However, every contributor should do its best to produce understandable sentences. Asking people to make an effort has noting to do with xenophobia.Quote from: ebclr on May 30, 2019, 01:17:53 pm

author: ogden
author_rank: Super Contributor
timestamp: May 30, 2019, 07:19:59 pm
content: Quote from: ebclr on May 30, 2019, 01:17:53 pmHire someone who knows target language well.Don't be ignorant

author: cliffyk
author_rank: Frequent Contributor
timestamp: May 30, 2019, 07:52:24 pm
content: The effect seen is an artifact of the crappy combination of incandescent and electronic flash lighting I used when photographing the unit's insides--it is actually quite well made for it's price point. And of course they attempt to protect their design 'twould be silly not to...

author: coromonadalix
author_rank: Super Contributor
timestamp: May 30, 2019, 08:38:08 pm
content: Im always annoyed to see they dont care about flux residues left

author: Rasz
author_rank: Super Contributor
timestamp: May 30, 2019, 08:43:48 pm
content: Quote from: coromonadalix on May 30, 2019, 08:38:08 pmits called NO CLEAN for a reason