The third time I repair it. I'm a pro now...
A compact power supply for the tekprobe interface
Testing the output capacity of the USB host port and the digital I/Os of the Rigol DP832
Communicating with the HP 6002A power supply through GPIB
Adding a cable to the ADA400A to connect it to an external power supply
A method to control the output polarity of the RIGOL DP832 by using the digital I/Os of the device