Tektronix P6138 350MHz 10X Passive Oscilloscope Probe 10M Ohm 10pF 1.3m

Tektronix P6138 350MHz 10X Passive Oscilloscope Probe 10M Ohm 10pF 1.3m

The Tektronix P6138 is a 350MHz bandwidth passive voltage probe designed for use with Tektronix oscilloscopes equipped with a BNC input. It provides 10X attenuation with a 10MΩ input impedance and 10.0pF input capacitance, making it well suited for general-purpose signal measurement up to 350MHz. The 1.3-meter coaxial cable gives comfortable reach on the bench without adding excessive capacitive loading.

Specifications & What's Included

• Model: Tektronix P6138
• Bandwidth: 350 MHz
• Attenuation: 10X
• Input Impedance: 10 MΩ
• Input Capacitance: 10.0 pF
• Cable Length: 1.3 meters
• Oscilloscope Connector: BNC
• Probe tip: standard sharp needle tip
• Ground lead: black alligator-style ground clip included
• Compensation adjustment: trimmer barrel at BNC end for scope input compensation

Applications

The P6138 is a general-purpose passive probe intended for use with Tektronix oscilloscopes — particularly those in the 200MHz–500MHz bandwidth class — though the BNC connector makes it compatible with many other brands as well. Passive probes in this class are standard bench tools for electronics development, production test, field service, and educational lab work. The 10X attenuation reduces oscilloscope input loading on the circuit under test, which is important for accurate signal capture at higher frequencies. The 350MHz bandwidth covers the vast majority of digital and analog measurements encountered in everyday electronics work, including logic signals, switching power supply waveforms, RF envelope detection, and general analog circuit troubleshooting. The P6138 dates from Tektronix's broadly used probe product line of the 1990s and remains a practical, capable probe that is still fully usable with any modern oscilloscope equipped with a BNC input and a matching 10MΩ/10–12pF front end.