Keysight 11945A Close-Field Probe Set

Manufacturer: Keysight
Model Number: 11945A
The Keysight 11945A close-field probe set includes both the 11940A and 11941A probes to provide full coverage from 9 kHz to 1 GHz. This set provides a powerful measurement tool for electrical and mechanical designers who want to search for and eliminate sources of interference from their products early in the design process. Includes: E51 = Keysight 11909A preamplifier, a 36 inch (914 mm) Type-N cable and a carrying bag to store and protect the entire set of probes, preamplifier, and cables.


  • Frequency Range: 30 MHz to 1 GHz
  • Maximum Input Power: 0.5 watts
  • Temperature Range: Variation over 0°C to +40°C
  • Dielectric Breakdown: ±1 kV, typical
  • Connector Type: SMA, replaceable barrel VSWR: <3:1, typical
  • Antenna Factor Accuracy: Individually calibrated to within ±2 dB in a 377 ohm field impedance

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