DSO Quad bandwidth

[Paul2]

@noname

The problem with the quad is that when you are only seeing an decent representation of the waveform you are supposed to see at about 1MHz or less, this is a great limitation to the usefulness of the device. The nano seems to have about the same useful bandwidth, I bought the quad hoping it would be a big improvement over the cheaper nano, it was not. Neither of these devices suit my needs. The wave out on the quad goes up to 8MHz in square wave mode, so out of the box, as is, you would expect it to perform like a good scope should up to at least 8MHz. Sadly, this is not the case. I think the reason why there are no more application or firmware updates to this project is that developers already understand their efforts are better used elsewhere. I wish the merchants selling these (including seeedstudio) would advertise upfront in bold type the 1MHz or less bandwidth limitation so people are tempted into thinking as I had that this might actually be a useful tool for their >1MHz applications.

Some reason stop me to go on with this device:

1. bandwidth ,not only the poor limitation but also the non-Smoothness gain ,this make calibration can not be achieved.
2. FPGA firmware bug, this case triggering not reliable. No development tools I can get to improve it.
3. No way to use a debug tool like J-link to debug MCU sourceware. this make Inefficient to develop an application.

Really hope the bug in Quad can much more less than my in English.