Thanks guys!
Just got my Quad the other day.
I’ve been testing it and compiling the source in prep for a project I have to finish soon.
Found the following what appears to be a bug with the code:
Triggering with Timebase at 0.5uS and rising edge never causes a trigger event.
Changing to negative edge triggered however works ok.
I have downloaded and installed the following:
1.50 SmTech 1.6
The latest source and also double checked that the Hex file does the same thing: (2.52+SmTech1.8+PMOS69 fixes)
Latest FPGA firmware
Feeling pretty ripped off however as the site I bought it off is still advertising:
4MHz is not 72MHz by any stretch of the imagination.
Glad others are however working on making it a usable product assuming the bandwidth limitation is not a problem.
Hello 
I want to update my DSO203 but really i am not sure what to do.
I have read the posts of this thread.
What i have understood (please explain if i am wrong) :
In order to have an APP compatible with a SYS i have to install :
Marco’s SYS 1.50-1.6
DSO203 GCC v1.21 APP
Concerning how to install the DSO203 GC 1.21 APP there are instructions so i will follow them.
But what am i supposed to do with the files :
APP25116.hex
SYS25116.hex
CFG_FPGA.ADR
V222FPGA.BIN
?
Thanks,
Hello RemiD
I may not be the best person to answer your question, but, I’ll tell what I know
The files you mention are needed to upgrade the DSO203
SYS is the backbone of the DSO203.
APP communicates with SYS and gives the DSO its personality. So, different APPs you can find have different UIs.
CFG_FPGA.ADR and xxxFPGA.Bin are to be loaded in sequence (without powering off the dso) to the DSO203 as explained elsewhere on this site.
If you still have doubts remaining, ask here.
Easter greetings
Hi Jerson
Can you please tell me where i can find the step by step procedure on how to load the SYS files to the DSO203 ?
Thanks,
Sure RemiD
Start with this link
http://www.seeedstudio.com/wiki/DSO_Quad
And you will also find these helpful
<LINK_TEXT text=“http://www.seeedstudio.com/wiki/DSO_Qua … mmunity%29”>http://www.seeedstudio.com/wiki/DSO_Quad_Manual_(by_the_community)</LINK_TEXT>
// various source files if you choose to tinker with the code
ftp://shodtech.net/DSO_Quad/
Hope this helps
Jerson
You can also look here: <LINK_TEXT text=“http://hifiduino.wordpress.com/2011/04/ … art-guide/”>http://hifiduino.wordpress.com/2011/04/30/dso-quad-quick-start-guide/</LINK_TEXT>
Thanks for the links, but i see the explanations are for the DSO Quad and i have a DS203.
Can i use the same SYS and APP on the DS203 ?
Sorry for all these questions but i don’t want to rush and break the device ! I hope you understand.
Thanks,
if (DSO Quad == DS203) Links_ok.
else Whats_a_quad?
Seriously, the two are the same thing.
Thanks for these precisions.
The device seems to work correctly with the updates.
some bug report or something
have difference with detect high frequency more than 5 Mhz - FIRST pictures
inaccuracy 8%-10%
and half difference with detect dso generete signal by yourself low frequencies - LAST picture
Thank you for your work! spectro analizer very help
Hi, I have just loaded this app on my Quad to resolve some shortcomings in the 2.53 app (no x10 probe support and I could never get the FFT to work properly) so very pleased with this version, thanks for all your efforts and hard work.
I have one question, when using the FFT the readouts in red flicker, especially bad on the predominant frequency reading and the Div reading at the upper left corner. Is this correct or have I missed something?
I have installed Sys 1.50 SmTech 1.6 GCC 1.21 App (2.51 + SmTech 1.8 + PMSO69 fixes) I am not sure which FPGA is installed (how can I tell?) and can this affect the flicker problem?
Please excuse if any of these questions are silly but this is the way to learn. Thanks for any help or advice.
Hi again, I have just noticed another weird thing, if you are using the quad while connected to my laptop by the usb lead all the voltage readings are way way out (2.6v p-p reads +0.578k !!) and can only be corrected by disconnecting the usb lead and rebooting. Any ideas?
Too many bugs and too little time.
I haven’t been able to touch the code since the last build, sorry.
Dive into the code guys. It won’t bite you 
Please don’t think I’m complaining, I really appreciate all the effort everyone has put in to make this a useable tool. I have now worked out that the measurements only go silly if you have FFT on AND connected to the PC, no real problem to work round. I was also only wondering if the flickering, I described a couple of posts ago, was to be expected or whether I had more stuff to instal or upgrade.
Yes, it’s just lazy programming.
When the waveform box is “printed” to the screen, it’s done drawing complete vertical lines (with the waveform dots in the middle) from left to right, so that erases the previous screen content in that area. Only then is the text printed on top of that.
To eliminate the flickering of text written in the waveform box, the text witting would have to be incorporated in the line drawing sweep itself, or something like that…
Yeah… here is some code for that if someone is really bothered by the flickering
https://svn.kapsi.fi/jpa/dsoquad/logic/gui/
vblack comes to the rescue
No flickering any more.
[code]v1.22
- FFT flickering fix, with improved drawing code (vblack)[/code]
Latest download: https://github.com/pmos69/dso203_gcc/zipball/master
Thanks, this looks so nice now. I appreciate all the effort everyone has put in to this program, it makes the Quad a useful tool instead of a toy. Thanks again, Mike
Hi all,
Is there thread with current list of major bugs, which needs to be fixed? I can try to fix them.