I'm still looking through the forum for an answer to this question, but thought I'd go ahead and post anyway just in case it hasn't been answered yet. If it has I can take this post down.
I have a V3 board, and as far as I can tell only channel 2 gives an output. If I enable other channels using the DRS Oscilloscope software, they do show static but will not show a signal if I connect one to them (e.g. a series of subsequent square waves). A technician and I took the board out and tested all the components leading up to the microcontrollers for each channel, and everything seemed to be working fine. I thought maybe it was configured to only have one channel read an output, but I looked through the Config panel in the software and nothing seemed to indicate that.
I am a novice, and maybe I'm missing something that I didn't see in the manual. I can post screenshots if needed!
Thank you for your help!