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The P6139B from Tektronix is a 500MHz high bandwidth, high impedance 10X passive voltage probe with 10 MR input resistance with TekProbe I interface. This probe features a small probe head and sharp tip that makes it easier to probe dense circuitry.The P6139B also features the TekProbe interface for direct BNC connection for oscilloscopes with 1Mohm inputs. Integrated oscilloscope and probe measurement systems feature intelligent communication that automatically scales and adjusts units on the oscilloscope display.