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The Tektronix P6040/CT-1 is a 35 kHz−1 GHz current probe intended for sampling scopes.

The P6040 is an 18-in 50 Ω cable with a GR-874 connector for the scope end (e.g. S-1, 3S6) and an SMB connector on the other end to connect to one of possibly several CT-1 transformers installed in a circuit to be tested.


Sensitivity 5 mV/mA into 50 Ω
Rise time <350 ps
Frequency response 35 kHz to 1 GHz (-30%)
Max. current 500 mA RMS, 100 A peak