NEW Product!!! Mini handheld oscilloscope - QDso (comparable to DSO203) - Page 1
Forum section: electronics / general

author: alyque
author_rank: Contributor
timestamp: August 20, 2012, 09:26:54 am
content: Hi,Here we provide a new mini oscilloscope called QDso(little Q), it comes with 3.5-inch TFT display, 40MHz bandwidth, and 200MHz sampling rate.Details:http://www.diyertool.com/measuring-equipment/oscilloscopes/qdso-mini-handheld-oscilloscope-with-40mhz-bandwidth.htmlLooking for tow professional guy for free trial, the only thing need to do is post a impersonal assessment video.If Mike Harrison or Dave can accept this plan, that will be appreciated!PS: This product is scheduled to be listed on August 25th.If you have any question about this topic, just contact me at cs@diyertool.comThank you very much!alyque

author: mianchen
author_rank: Regular Contributor
timestamp: August 20, 2012, 10:25:50 am
content: QuoteThey both have to learn some Chinese first, you'd be better off sending one to my way

author: alyque
author_rank: Contributor
timestamp: August 20, 2012, 10:46:13 am
content: Quote from: mianchen on August 20, 2012, 10:25:50 amThe device have English interface

author: alyque
author_rank: Contributor
timestamp: August 20, 2012, 10:53:45 am
content: Quote from: mianchen on August 20, 2012, 10:25:50 amIf you want to try this product, please send one of your review video on other products to cs@diyertool.com. we will consider of your opportunity.

author: EEVblog
author_rank: Unknown
timestamp: August 20, 2012, 12:02:20 pm
content: Quote from: alyque on August 20, 2012, 09:26:54 amHmm, how about a public vote? Should I bother?I already have a backlog of gear, so any full review won't get done soon I suspect.Feel free to send for a mailbag play and teardown.Dave.

author: alyque
author_rank: Contributor
timestamp: August 20, 2012, 12:13:20 pm
content: Quote from: EEVblog on August 20, 2012, 12:02:20 pmThat's great! We can send you a device for free in the end of this month, and it is no problem when you will do a full review.Please send your address and telephone number to cs@diyertool.comThanks!

author: KTP
author_rank: Frequent Contributor
timestamp: August 20, 2012, 12:24:32 pm
content: Quote from: alyque on August 20, 2012, 12:13:20 pmI think Dave lives in Austria.

author: bullet308
author_rank: Frequent Contributor
timestamp: August 20, 2012, 01:48:37 pm
content: Quote from: EEVblog on August 20, 2012, 12:02:20 pmSeems to me that if he has the guts to send you one, and it proved to be useful, it would be a great addition to a lot of peoples toolkits. So, yeah. If this thing delivers anything like its specs, Id probably own one. :-) Id give it pretty high priority. Thumbs up or down, it would be a fun and useful review.

author: aluck
author_rank: Regular Contributor
timestamp: August 20, 2012, 02:44:47 pm
content: Quote from: EEVblog on August 20, 2012, 12:02:20 pmThat would be nice.Also it would be nice to see actual specs for this scope.

author: KD0CAC John
author_rank: Frequent Contributor
timestamp: August 20, 2012, 02:50:32 pm
content: You may want to try the link , it had a seller source with info .

author: aluck
author_rank: Regular Contributor
timestamp: August 20, 2012, 02:57:52 pm
content: Quote from: KD0CAC John on August 20, 2012, 02:50:32 pmSorry, missed that out.It is rated at 200Msps. It's only me who thinks that it's only useful up to 20 MHz?Also, do I need to buy a special probe for this? It's a kind of SMA connector? My probes are quite abused by car engine's testing, it would be nice if there is an SMA-to-BNC converter.

author: SeanB
author_rank: Super Contributor
timestamp: August 20, 2012, 03:06:29 pm
content: Send one to Mike.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: August 20, 2012, 04:50:39 pm
content: I don't have a major issue woth SMA/SMB or whatever as probe connectors as long as the supplied probe is OK and replaceable easily at reasonable cost. An inclused short moulded SM? to BNC would be nice.Probably my biggest reservation on this one is it's only single channel. A 2-channel scope is rather more than twice as useful as single channel, but costs only a small amount more to build.Among all the small scopes I've looked at, by far the biggest annoyance is they use buttons instead of knobs. Edge-mounted dedicated-function encoders, or a well thought-out touchscreen would be a lot better.

author: AndyC_772
author_rank: Super Contributor
timestamp: August 20, 2012, 05:48:10 pm
content: I'd definitely agree with you on that one, two channels is an absolute minimum.How else can you see SCL and SDA together on an I2C bus? Or check the relationship between CS and data on a memory interface? How can you check if noise on one signal occurs at the same time as some other signal changes state? How do you measure the propagation delay from a clock signal to a data output?With only one channel then there are certainly some things that can be usefully measured, and I do like the fact that the bandwidth is high enough to capture an idea of the shapes of spikes, glitches and digital signals. Unfortunately, though, if it lacks the ability to show two signals together, and how they relate to each other in time, then it's a much less useful tool than it could otherwise have been.Nevertheless, if it's fast, responsive and triggers correctly all the time and under all conditions, then it could have a place in my toolbox. Perhaps with better dc accuracy it could replace a DVM? Maybe the time base can be set slow enough that it's a useful data logger?Even if accuracy and memory depth are limited in hardware, there are still some worthwhile features it could have which would elevate it to a serious tool. Does it have peak detection and hi-res acquisition modes? I see it can do automatic frequency and amplitude measurements which is great, but does it have on-screen cursors too?One way in which proper, grown-up scopes are streets ahead of entry-level 'toy' scopes is that they show the waveforms not just as on/off pixels, but in shades of colour depending on how frequently the waveform takes a particular value - much as the display persistence of an analogue CRO does. It's an invaluable feature for spotting patterns in a noisy signal, and gives a much better impression of how a signal is truly varying over time than just looking at a blocky trace jumping around each time the display is refreshed. If this scope could have a display like that, its place in my pocket would be all but guaranteed.

author: Monkeh
author_rank: Super Contributor
timestamp: August 20, 2012, 06:36:27 pm
content: Quote from: T4P on August 20, 2012, 06:01:41 pmYou mean it displays a waveform in the middle of the screen, has various indicators on the edges, and a blue background?My god, they totally stole the design!

author: SeanB
author_rank: Super Contributor
timestamp: August 20, 2012, 06:40:10 pm
content: For the ultimate test send to Photonic...........I love the smell of electronics burning in the morning.

author: aluck
author_rank: Regular Contributor
timestamp: August 20, 2012, 06:43:00 pm
content: Quote from: mikeselectricstuff on August 20, 2012, 04:50:39 pmWould they be as easily replaceable 5 years from now, or will you have to throw it away just because your last probe had been broken?Ihatenon-standard connectors. We have an industry standard, why should we bother to change it?And -yes, two-channel scope is much more useful.

author: AndyC_772
author_rank: Super Contributor
timestamp: August 20, 2012, 06:50:28 pm
content: I expect it's just because a BNC connector is wider than the thickness of the unit would allow. Personally I'd rather not have BNC connectors wearing a hole in my pocket - I've no problem with using SMA/SMB instead. Having to use a short adapter lead wouldn't be a major issue IMHO.

author: aluck
author_rank: Regular Contributor
timestamp: August 20, 2012, 06:54:56 pm
content: Quote from: AndyC_772 on August 20, 2012, 06:50:28 pmThen you are going to put also a probe in your pocket, aren't you? Then I have bad news for you - it takes a couple of flexes to ruin it's cable. They are not too durable for flexion, and being bent they tend to decay and fail.

author: AndyC_772
author_rank: Super Contributor
timestamp: August 20, 2012, 07:48:06 pm
content: "Is that a BNC probe in your pocket or are you just pleased to see me?"

author: aluck
author_rank: Regular Contributor
timestamp: August 20, 2012, 08:13:49 pm
content: Quote from: AndyC_772 on August 20, 2012, 07:48:06 pm"no, it's a screwdriver for... well, screwing"

author: alyque
author_rank: Contributor
timestamp: August 21, 2012, 02:06:06 am
content: Quote from: mikeselectricstuff on August 20, 2012, 04:50:39 pmAgree! I will gather these good ideas and submit to its design team, i think they will be glad to look at these ideas. A touchscreen device would be very nicePS: I have got in touch with Mike and Dave, this plan will be implemented. Thanks Mike and Dave, I hope not disturb their life.If you want to try this product, you may need to wait for reviews, we will provide some free if the review verdict is not too bad.People can send request to cs@diyertool.com. There will be a response when the device is proved useful!

author: G7PSK
author_rank: Super Contributor
timestamp: August 21, 2012, 07:02:49 am
content: I suspect that SMA/SMB connectors might get far more common on oscilloscopes in the future as higher frequency's are called for.http://www.interfacebus.com/RF_Connector_Frequency_Range.html

author: AndyC_772
author_rank: Super Contributor
timestamp: August 21, 2012, 07:20:07 am
content: Quite possibly, but the probes required will be completely different. Most (all?) 1GHz+ probes are acitve, with a tiny amplifier located right by the probe tip, and they have very limited voltage ranges. They're not suitable for general purpsoe use in the way that a regular 10:1 passive probe is.

author: Short Circuit
author_rank: Frequent Contributor
timestamp: August 21, 2012, 08:55:31 am
content: Quote from: G7PSK on August 21, 2012, 07:02:49 amPossibly not. In the past this was true indeed. Most GHz (sampling) scopes came with SMA connectors or high-performance versions thereof.As of recent, this could be changing; they have been point of discussion, the special 18GHz BNC sockets on this Agilent $100k+ scope that Dave had for review.https://www.eevblog.com/forum/blog-specific/eevblog-316-more-pfang-more-13ghz-scope-more-pulser/msg130496/#msg130496As for the connectors on these nano scopes, I think this are MCX sockets. Not particulary capable in terms of frequency range, but quite suitable for this application.They provide good mating with a simple push-in pull-out motion. Quite similar to SMB, except that the PCB socket is the female body, so much more suitable for flush panel mounting.

author: alyque
author_rank: Contributor
timestamp: August 21, 2012, 02:09:07 pm
content: Quote from: mikeselectricstuff on August 20, 2012, 04:50:39 pmLatest news! The manufacturer confirmed a double channel version will be completed in November, equipped 4.3-inch TFT display.

author: aluck
author_rank: Regular Contributor
timestamp: August 21, 2012, 08:38:35 pm
content: Quote from: alyque on August 21, 2012, 02:09:07 pmand the price is?..

author: Short Circuit
author_rank: Frequent Contributor
timestamp: August 21, 2012, 08:47:44 pm
content: Quote from: T4P on August 21, 2012, 07:58:23 pmNo problem;"DSO90000A-821 Additional Precision BNC to SMA adapters includes qty 2 EUR 328"Shouldn't be a problem to get a kit for free with purchase of such machine

author: alyque
author_rank: Contributor
timestamp: August 22, 2012, 01:57:13 am
content: Quote from: aluck on August 21, 2012, 08:38:35 pmThe price would be lower than DSO203.

author: aluck
author_rank: Regular Contributor
timestamp: August 22, 2012, 10:26:34 am
content: oh, really?http://www.dealextreme.com/p/ds-203-3-0-lcd-pocket-mini-oscilloscope-65990?item=10it is rather hard to beat $169.40 price

author: AndyC_772
author_rank: Super Contributor
timestamp: August 22, 2012, 11:40:33 am
content: I don't think it's really a good idea to compare the two, though. The DSO Quad (apparently) has well documented bugs and limitations which mean it's not the useful, reliable tool that it really needs to be. Its price, therefore, is irrelevant.What the market needs - or at least, what I would buy for my business - is a scope which is boringly reliable, completely predictable in its behaviour, and where robustness and performance are prioritised way above feature count. If it could get the basics absolutely right, it could command a significantly higher price and still be better value - IMHO, of course.

author: popultek
author_rank: Newbie
timestamp: August 31, 2012, 06:04:18 am
content: We are QDso sales too, more cheap, China mainland.

author: hans
author_rank: Super Contributor
timestamp: August 31, 2012, 09:16:45 am
content: Quote from: T4P on August 22, 2012, 04:07:36 pmYou think a STM32 has a 72MSPS onchip ADC? I know the STM32F4 has 7.2MSPS, but that's tenfold smaller.The STM32F1 has like <1MSPS.http://www.electrodragon.com/wp-content/uploads/2012/03/DS203-Oscilloscope7.jpgIf I see correctly, I see a STM processor, with a huge logic device (and a big parallel bus), and another QFP chip which appears to be an ADC (it has another parallel bus to the logic chip). The schematic (link) says it's a AD9288-40, connected to a FPGA and to the STM32.But seriously, I still think handheld scopes are toys. I don't really see the advantage to a bench or even a USB scope. I only see it's useful for on-the-road debugging..Other than that, the screen is too small (c'mon, my mobile phone is 4"), little sample buffer.A picoscope 2204 is a 2-ch, 100MS/s (10MHz bandwidth - fully respecting the 10x general rule), 8kpts of memory, AWG, trigger input, 1080p view (well, atleast at my PC). 200 euro. (similar to what the DSO Quad would cost me here).

author: EEVblog
author_rank: Unknown
timestamp: August 31, 2012, 10:16:46 am
content: Quote from: hans on August 31, 2012, 09:16:45 amYep, that's their only use IMO. And I'm sure this one will be no different.But thereisa niche market for that.Dave.

author: Psi
author_rank: Super Contributor
timestamp: August 31, 2012, 12:04:38 pm
content: Quote from: hans on August 31, 2012, 09:16:45 amThe other thing they're useful for is those times when you need an isolated scope.

author: Bored@Work
author_rank: Super Contributor
timestamp: August 31, 2012, 02:29:27 pm
content: Just because a scope is handheld and battery powered doesn't make it a safe isolated scope.

author: aluck
author_rank: Regular Contributor
timestamp: August 31, 2012, 05:09:07 pm
content: Quote from: EEVblog on August 31, 2012, 10:16:46 amThere is a HUGE market for automotive diagnostics. No need for more than 20 MHz (actually 5 MHz will cover 90% cases). Also, 2-4 channels are OK. But to use an ordinary oscilloscope for diagnostics you have to add a very specific functionality to the firmware (or software if we are talking about USB scopes).

author: cookie
author_rank: Contributor
timestamp: September 01, 2012, 02:15:33 am
content: Oh, that's a good one, thanks for sharing

author: AndyC_772
author_rank: Super Contributor
timestamp: September 03, 2012, 09:46:36 pm
content: Quote from: Bored@Work on August 31, 2012, 02:29:27 pmI'm going to go out on a limb here, and say something which I've no doubt could be deliberately misinterpreted - but I'll say it anyway: safety is overrated.Throughout my professional career I've only ever probed mains or other high energy circuits maybe half a dozen times. On the other hand, every day I probe safe, low voltage circuits, where the worst thing that could reasonably happen is a flash, a surprising but ultimately harmless bang, and a familiar smell that means it's probably time for a coffee break.As engineers it's our job to be able to assess when we're dealing with a hazardous circuit and when we're not. There are plenty of circuits I'd happily probe by gently poking them with a wire and an LED, and for those a scope like this is perfectly fine. There are others which I'd probe by turning them off, attaching wires and retreating to a safe distance before powering them back up again, and for those it probably isn't.

author: cookie
author_rank: Contributor
timestamp: September 05, 2012, 02:17:15 pm
content: I care where did it produce.....made in China?

author: KD0CAC John
author_rank: Frequent Contributor
timestamp: September 05, 2012, 04:37:52 pm
content: Here may be a good portable , only issue , I can not send 10K - 40KDave , see if they will send you one of thesehttp://www.engineeringtv.com/video/FieldFox-Handheld-Analyzers-fro

author: PA0PBZ
author_rank: Super Contributor
timestamp: September 05, 2012, 07:19:30 pm
content: Quote from: KD0CAC John on September 05, 2012, 04:37:52 pmWhat a coincidence, I just found one on a local auction site:http://link.marktplaats.nl/592343401(Sorry, it's Dutch)But: no scope function... bummer

author: alyque
author_rank: Contributor
timestamp: September 09, 2012, 05:13:35 am
content: hello, we had sent the device to Mike and Dave tow days ago, then let's wait for their reviews.PS: The product accepting order now...link:http://www.diyertool.com/measuring-equipment/oscilloscopes/qdso-mini-handheld-oscilloscope-with-40mhz-bandwidth.html

author: KD0CAC John
author_rank: Frequent Contributor
timestamp: September 09, 2012, 01:21:00 pm
content: Quote from: PA0PBZ on September 05, 2012, 07:19:30 pmI wouldn't have thought there were any on the used market yet , little suspect , but do not know ?They are fully up-gradable as the video says so adding any functions to it should not be an issue , maybe .But still beyond my limit at this time , but I would be curious to know if and what the costs would be to buy that item & some up-grades & shipping .The site automatically translates on my laptop , thanks John

author: PA0PBZ
author_rank: Super Contributor
timestamp: September 09, 2012, 03:46:11 pm
content: I don't think there is a scope function available at all, I didn't see any evidence of it in the video.But yes, it is a bit too expensive for me too, and the one in the auction has no spectrum analyser function built in, otherwise I would have thought about it. It's only 15KM from where I live so I could always go for pickup, but without the SA (which would cost at least an arm or a leg to add) it is just too expensive. I don't really need it to be portable, I already have a nice SA with TG in the shack.Paul

author: KD0CAC John
author_rank: Frequent Contributor
timestamp: September 10, 2012, 12:59:09 am
content: If I could come close to buying , I would contact Algent and double check about the update capabilities .As it is I do not need to worry about .

author: mianchen
author_rank: Regular Contributor
timestamp: September 14, 2012, 07:26:34 am
content: I hope this is there 'prototype' they sent out. I will not have a second look if they can't even source a decent case and use a mp3 case. Pretty appalling.

author: T4P
author_rank: Super Contributor
timestamp: September 14, 2012, 08:46:58 am
content: MY EYES!!! THEY BURN!!! Nasty case ...

author: aluck
author_rank: Regular Contributor
timestamp: September 14, 2012, 01:49:45 pm
content: Why don't they open-source the firmware? It would've been rather nice if other guys could incorporate what they need into it's functionality. I would like to have DIS ignition check mode for automotive, but it is so special, that only automotive (read: > $500) scopes have that.

author: mianchen
author_rank: Regular Contributor
timestamp: September 16, 2012, 11:44:56 pm
content: They are selling it on eBay now...2 sold...People will buy anything if it's 'cheap'...eBay auction: #251146530525

author: bullet308
author_rank: Frequent Contributor
timestamp: September 17, 2012, 02:50:31 am
content: Tragic. There should be a cost-effective combination of media player and tablet parts out there that can be bolted together into something really neat. And yeah, open-sourcing the software would very much be the smart way to go in this case, as with many others.

author: Bored@Work
author_rank: Super Contributor
timestamp: September 17, 2012, 05:30:57 am
content: If you prefer, the original media playerhttp://www.totodeal.com/4gb-35-inch-mp5-player-with-card-slot-orange-white-p2290.htmlWriting a good user interface, especially for a touchscreen-only device is a lot of work and requires experience and talent. My employer is currently going through that learning curve. Someone thought it is a good idea to accompany one of our products with an app. Yeah well ... And someone hired that "smart" kid to do it, because it is just an app, you know ... The kid now has some more beer money. We have an app, too. And the customers are shaking their heads in disbelieve.

author: Jimmy the Squid
author_rank: Regular Contributor
timestamp: September 25, 2012, 01:12:30 am
content: Found this on eBay for it. I guess if you're going to buy that scope, you're vacuous enough to buy a flannel bag for it.Alt URL:http://www.ebay.com/itm/Flannel-Bag-DSO-mini-Digital-Oscilloscope-MP3-/180832877616