- Published: Friday, 22 June 2012
- Written by Jon Chandler
You may recall that my Hantek DS-3X55 signal generator met with disaster when I was testing out the Sony-Tek o'scope I got at Goodwill when I had a ground issue with my bench power supply. I ended up shorting the power supply vis the USB ground connection which resulted in no output.
I found a picture of the Handtek internals on the EEV Blog. The output of the microcontroller has an op-amp buffer chip. Since everything worked but I had no output signal, my conclusion was that my power supply short had destroyed it. The signal generator still responded to USB commands and the sync output operated normally which supported this conclusion. The board is shown below. A large microcontroller, a few support chips and a lot of empty space.
The output buffer is the SOIC-8 in the center - an LMH6702A, a low distortion opamp.Discuss this article in the forums (4 replies).