Yet another pocket DSO question - Page 1
Forum section: electronics / testgear

author: callipso
author_rank: Regular Contributor
timestamp: July 17, 2014, 05:00:22 pm
content: First of all - yes, I have indeed read up on these here on the forum and know in fact that these tend to be pure feces, but:I'm a sound guy and am currently in desperate need of a dual channel FFT spectrum analyzer (preferably one with a built-in sweeping function gennie) that is very portable for use on gigs to fine tune and troubleshoot the audio systems. All I know about DSOs comes from Dave's vids and this forum, I have zero personal experience with these - so far a recording interface hooked up to my good old Linux powered lappie proved sufficient, but a dedicated HW will be a necessity soon for various reasons.My question to you, experienced tech genii is:http://www.ebay.com/itm/Mini-ARM-DSO203-USB-Signal-Generator-Nano-Digital-Oscilloscope-with-x1-x10-probe-/140722136991?pt=BI_Oscilloscopes&hash=item20c3b1679f<-- schematic and specs insideGO or NO-GO?It seems to be capable of just what I need and spec-wise doesn't seem to have the major flaw of the piece-of-turd toy-o-scope Dave reviewed - DC-only coupling (plus the case is dedicated, no reused MP* player case here), plus both the HW and SW are open, there are numerous applications available for the thing (including the motherdanging FFT I need).Thanks for all the infoP.S.: Please don't respond just to shitstorm me for bringing another chinese turd up, I know I should get a proper analog scope 'n stuff, I just really need someone who know his scopes to take a look at the thing (schematics, specs) and tell me whether to go for it or notand why.Thanks againEDIT:I am also considering the JYEtech DSO094 (and possibly the xMinilab by gabotronics...)

author: mjkuwp
author_rank: Unknown
timestamp: July 17, 2014, 05:21:59 pm
content: is it some kind of copy of this one?http://www.seeedstudio.com/depot/DSO-Quad-Aluminium-Alloy-Black-p-1034.html?cPath=63_65I recommend purchasing from seeedstudio. I am in the USA and have made many purchases from seeed - over the last few years.I have the older simpler DSO nano and I liked it for what it was but I have better equipment now and I never touch it. It was not very convenient to use but I did get some use out if it.I don't know how to figure out of that ebay thing is any good or not, sorry.

author: callipso
author_rank: Regular Contributor
timestamp: July 17, 2014, 05:39:54 pm
content: It's precisely the same thing, for all I know, seeed just rebadges these chinese scopes and resells them.

author: Lightages
author_rank: Unknown
timestamp: July 17, 2014, 07:46:41 pm
content: For the work you want to do, this thing is actually useful but a bit expensive for its real quality. No matter, if works for the job you want then it is worth what you need to pay.From what I can see you only get a simple function generator. Am I wrong or will it also do sweep and pink noise? These things are necessary for sound checks. If it will do this then it seem perfect for the job. Just add a flat mic and preamp and you have what you need. IF it doesn't do sweep and pink noise then you need to buy another sweep/noise generator to get these signals.IMHO, a better approach is to get a small netbook and run any of the free software that does all these things and with better utility. Yes, the problem is the bulk if you are trying to get into tight or high places. Being able to record and save the results for future use is a big plus. Also with a notebook at hand you have access to all the other programs you might want to use.An alternative for generating the sweep/noise signal is to use sound file on your cell phone. I am sure there are pink noise and sweep sound files available all over for free.

author: callipso
author_rank: Regular Contributor
timestamp: July 17, 2014, 08:02:53 pm
content: Quote from: Lightages on July 17, 2014, 07:46:41 pmThis is basically the way I've been doing things so far (except for the netbook being a beefy thinkpad), the problem is indeed the portability. As for the gennie in the thing, I'd say it could be added by the means of software addon, as these are supported...Still deciding