I bought at Amazon Germany an oscilloscope SainSmart DSO203 NANO. Unfortunatedly it came without any manual.
Do you have manuals for oscilloscope? Any help would be appreciated.
This appears to be one of those devices sold by many places with slight variations in name.
Some general info including firmware (alternatives?) is at
http://www.seeedstudio.com/wiki/DSO_Quad
including an "Unofficial manual written by the community"
They post the link of manual on their website. You can download it from there. http://www.sainsmart.com/zen/documents/20-010-201/DS203_Manual.rar