High Frequency Probe 300kHz - 3GHz. Unit sold with a valid calibration certificate. The Agilent (now Keysight) 85024A high-frequency probe makes it easy to perform in-circuit measurements. An input capacitance of only 0.7 pF shunted by 1 megohm of resistance permits high frequency probing without adversely loading the circuit under test. Excellent frequency response and unity gain guarantee high accuracy in swept measurements with this probe. High probe sensitivity and low distortion levels allow measurements to be made while taking advantage of the full dynamic range of Agilent (now Keysight) RF analyzers.