20X Low Capacitance Probe
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Features & Benefits

  • 3 GHz Bandwidth
  • 1.5 pF Input Capacitance
  • 1 kΩ Input Resistance
  • 22 VRMS Max. Input Voltage
  • Activates 20X Readout in TEKPROBE™ Interface Instruments
  • Compact Probe Tip Compatible with a Wide Range of Tektronix Accessories and Adapters


  • High-speed Device Characterization
  • Propagation Delays for ECL, CMOS and Other Logic Circuitry and Devices
  • Circuit Board Impedance Testing (TDR)
  • High-speed Sampling Systems
P6158 DC to 3 GHz

The P6158 is a 3 GHz, 20X, low-capacitance probe. The P6158 is ideal for high-speed applications because of its ability to extend high-frequency response to 3 GHz. The BNC connector incorporates encoding to correct scale factors for 20X attenuation in oscilloscopes with TEKPROBE® power supply interface. To facilitate SMD probing, the P6158 comes standard with SureFoot® adapters. Additionally, the probe comes standard with an array of short ground leads that insert minimal inductance into the signal path of the measured waveform. The compact probe head/tip assembly is compatible with the full line of 3.5 mm probe accessories. Designed for the TDS500/600/700/5000/6000/7000 Series oscilloscopes, the P6158 probe may also be used with 50 Ω 11000 Series plug-ins and the 11800 Series SD2X Sampling/TDR plug-ins with BNC to SMA Adapters.



Bandwidth (Probe Only) - DC to 3 GHz, -3 dB.

Rise Time - >100 ps.

Attenuation - x20 (-26 dB).

Attenuation Accuracy - ±3%.

Input C - 1.5 pF.

Input R - 1 kΩ.

Output Termination - Terminate into 50 Ω.

Signal Delay - 5 ns.

Physical Characteristics

Probe Tip/Head Style - 3.5 mm/Compact.

Output Cable Length - 1.2 m.

Environmental Characteristics

Temperature - Operating: -15 °C to +55 °C (+5 °F to +131 °F).

Humidity -

High operating: 55 °C @ 95 to 97% RH.

Low operating: 30 °C @ 95 to 97% RH.


Recommended Instruments

TDS500/600/700/7000 Series.

11000 Series.

11800 SD2X Sampling/TDR plug-ins.



Figure 1. P6158 Attenuation vs. frequency.


Figure 2. P6158 Input impedance and phase.


Figure 3. SF200A Series SureFoot® adapters.


Figure 4. Compact probe tip circuit board test points.


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