New $40 2ch pocket scope, 2MHz/50MSps (august 2023) - Page 1
Forum section: electronics / testgear

author: tunk
author_rank: Super Contributor
timestamp: August 11, 2023, 08:02:46 pm
content: - analog bandwidth 10MHz, actual bandwidth 2MHz (??)- 50MSps- storage depth 20kB- 3.2" screen, 320x240 pixels- size 120x66x18.5mmhttps://www.aliexpress.com/item/1005005879558074.htmlhttps://www.aliexpress.com/item/1005005878267272.html

author: siealex
author_rank: Regular Contributor
timestamp: August 11, 2023, 08:28:48 pm
content: Does it use the same ADC as the Zotek ZT702S (or possibly two such ADCs)? The characteristics look surprisingly similar.

author: Aldo22
author_rank: Super Contributor
timestamp: August 11, 2023, 09:49:21 pm
content: Yes, it's cheap for a 2-channel scope, but does it have a name?I don't even know what to google to find out more.

author: Shonky
author_rank: Frequent Contributor
timestamp: August 11, 2023, 09:58:05 pm
content: Quote from: Aldo22 on August 11, 2023, 09:49:21 pmSays SCO_2_10M in the second image.

author: Fungus
author_rank: Super Contributor
timestamp: August 12, 2023, 07:55:59 pm
content: Quote from: tunk on August 11, 2023, 08:02:46 pmWhat does that mean???Maybe it's like the Zeeweii which is sold in two versions, 1Mhz and 18Mhz, even though they're identical hardware. The only difference is the type of probe, the "1Mhz" version comes with crocodile clips and the "18Mhz" version comes with a 10x probe. You can use your own probe with the 1Mhz version and it works at 18MHz.https://www.aliexpress.com/item/1005005762980323.htmlIt's not worth doing it though, 6 Euros more for a probe+battery is a bargain.(I'm holding out for a 2-channel version of that - they're awesome little things and as small as a credit card)

author: Doctorandus_P
author_rank: Super Contributor
timestamp: August 12, 2023, 08:27:19 pm
content: This could be a fun gadget for that price but it does have to have a decent level of reliability and trustworthiness.I am more interested in a Siglent for anything serious, but still consider buying something like this just for shits and giggles or for hacking into. But some level of trustworthiness is still mandatory. The Fnirsi garbage for example does not do that, because it blatantly lies about it's specifications, and on top of that tries to hide this by always dong some weird averaging on the signal. That thing is just horrible.This is all the more important because gadgets like this are targeted to the beginners market, and those beginners don't have the skills to interpret the limits and recognize the faults. I'm guessing fnirsi relies on that, and that makes them sneaky bastards all the more.This thing also does not start well in that regard.What does a "Sampling rate: 50M/Channels" mean?And a bit lower, it suggests an "Actual bandwidth" of 2MSa/S/Channels, which could be interpreted as 1Msps if both channels are on.But "Analog bandwidth" also uses "10MSa/S/Channels".And someone should tell them that seconds is a lower case s, Upper case "S" is for Siemens, which does not make sense in this context.To me it's a lot of Chinglish that adds to the confusion.But still, I'd like to see thorough review, including a teardown of this thing. Especially if it has a half decent analog frontend. But even if it is decent, it is unlikely that I would buy one. It is the lack of a rotary button that does it for me. I'm addicted to rotary buttons. I have bought the "DSO Shell", (which does have a rotary button) and I would have liked it if it had better triggering.

author: Aldo22
author_rank: Super Contributor
timestamp: August 12, 2023, 08:32:59 pm
content: Quote from: Fungus on August 12, 2023, 07:55:59 pmWrong store link.I recommend the Zeeweii Official Store.They will answer questions if you bought there and send you firmware updates if necessary (the latter from hearsay).https://www.aliexpress.com/item/1005004972406356.html

author: tunk
author_rank: Super Contributor
timestamp: September 05, 2023, 09:56:07 pm
content: Found a shortish review, summed up as:- The analog bandwidth is about 7MHz.- Auto is useless in 2ch mode (probably a bug).- The x10 probe cannot be calibrated because there is no reference signal.- The operability is not good (although all cheap models are the same, soit's not a particular drawback of this).- For the price, it has 2ch, several MHz bandwidth, cursors, and triggermovement on the time axis.- The current measurement function is a major feature of this model.https://www-jh4vaj-com.translate.goog/archives/40424?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-US&_x_tr_pto=wapp

author: Aldo22
author_rank: Super Contributor
timestamp: October 31, 2023, 01:28:47 pm
content: There's a video in Portuguese:

author: tunk
author_rank: Super Contributor
timestamp: January 21, 2024, 10:48:13 pm
content: Another review:https://mysku-club.translate.goog/blog/aliexpress/98871.html?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=no&_x_tr_hist=true

author: tunk
author_rank: Super Contributor
timestamp: May 30, 2024, 03:12:51 pm
content: Another review, basically it meets it's 10MHz spec:https://youtu.be/watch?v=6ggLijMyODE&pp

author: tunk
author_rank: Super Contributor
timestamp: July 27, 2025, 01:39:26 pm
content: A short teardown video showing it is using a Gigadevice GD32F407 and AD9288:https://youtu.be/EdfXdUnEjEA