Q: I'm using a benchtop variable DC power supply operating in constant current short circuit mode, and a DMM measuring the current. Is it technically feasible to use a TCP202A current probe connected to a MSO2024B using a TPA-BNC adapter, with 12V DC @1.5 ADC?
A: No, the TCP202A needs to use the 1103 probe power supply and a 50Ω terminator instead of the TPA-BNC adapter. This is due to the TCP202A being designed for a 50Ω termination instead of the MSO2kB 1MΩ termination.
If you switch to connecting the TCP202A to a 1103, then have a 50Ω termination between the 1103 and the scope it will resolve the issue. Note, you will need to manually configure the vertical channel settings to support this setup.