Engineered to meet the stringent demands of advanced high frequency circuit designers. This high impedance probe combines full DC capability, rise/fall times of 120 ps, and a nominal loading input impedance of 10 megohm shunted by 0.1 pf. Signal attenuation is 20:1 with a 50 ohm oscilloscope input.

Like our other active probes, the Model 34A achieves its bandwidth using just one probe point, which greatly simplifies internal node testing without sacrificing performance.

An assortment of user replaceable probe tips are available for a variety of probing needs. The Model 34A is powered by our standard Picoprobe® power supply.

The Picoprobe® Model 34A can be mounted on any micropositioner for use with any probing system.


Input Capacitance


Input Resistance

10.0 megohm

Rise/fall time

120 ps (5V pulse)

Frequency Response

DC to 3 GHz (-3dB)

Operating Range

-7V to +10V



Gain Accuracy


Signal Attenuation

20 : 1

Model 34A Replacement Tips
Tungsten Probing Wire
Shaft Diameter
Point Radius

34A-4-5 5 micron <0.1 micron
34A-4-10 10 micron <0.1 micron
34A-4-22 22 micron <1.0 micron
34A-4-35 35 micron <2.0 micron
34A-4-60 60 micron <3.0 micron
34A-4-125 125 micron <5.0 micron

Requires the use of a Picoprobe® Power Supply. Please specify 110V or 220V when ordering.