P-20B 12 GHz SMA Probe

The P-20B is a PASSIVE 10:1 RF VOLTAGE PROBE with a 50 Volt DC BLOCK built in. It has been designed to allow users of RF test equipment to use standard signal tracing techniques.

The P-20B makes it possible to conveniently and accurately monitor or inject signals up to 12 GHz into RF circuits without significantly loading or detuning them. The P-20B comes with Interchangeable Ground Clips that adapt to a wide range of applications.

Theory of Operation

A frequency compensated 450 ohm resistive element is utilized in the probe’s design to reduce circuit loading and to give the P-20B a 10:1 VOLTAGE RATIO when connected to a 50 ohm instrument and probing a 50 ohm source. Special construction techniques of the P-20B produce low stray capacitance to minimize the capacitive loading effects on RF circuits.

RF instruments require low inductance grounding to make consistent and accurate measurements. The P-20B’s Interchangeable Ground Clips provide low inductance grounding and the ability to make contact with the circuit’s RF ground.

To prevent false readings or damage to test equipment, an internal DC blocking capacitor ( 50 volts MAX. ) is built in to decouple in-circuit supply voltages.

Typical P-20B Probe Response