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The Tektronix P6038 is a sampling probe used by the 3S3 and 4S3 sampling plug-ins.

The P6038 contains a sampling gate made of four GaAs diodes that snap into place. It is similar to the S-3 probe.

Other than the sampling gate, the P6038 contains a toroidal common-mode choke to help balance the sampling pulses that come from the plug-in to the sampling gate.

There is no amplifier in the P6038.


Rise time 350 ps
Input impedance 100 kΩ
Kickout < 50 mV (probe alone), < 5 mV (probe with ×10 attenuator tip)