I am testing some power circuits which fail under some overloads. As it fails, the damage spreads and damages other components. Therefore I want to shutdown the system as soon as the initial failure occurs -- basically when a current exceeds a threshold -- and shutdown within < 10 us by shorting the external power supply with a v. large MOSFET.
I am thinking of using an OWON VDS1022I driven by a current clamp, and using the Trigger Out signal (maybe buffered with an NPN) to effect the shutdown. I don't care about the other 'scope functions, but I can't find detailed information on the Trigger Out function. Specifically:
Is this a 50 Ω output ?
What is the amplitude ? Is it 0 V until the trigger event and then 3-5 V ?
If I set a trigger in the middle of the screen, will the Trigger Out go high as soon (< 1 us) as the trigger occurs ?
how long does it stay high for ? The remainder of the trace ? So if I set it to slow (10 ms/div ?), I could get a pulse that is 10's of ms long
(the lab power supply will OCP after that).