• Designed to measure magnetic-field radiation from surface currents, slots, cables, and ICs for EMC diagnostic and troubleshooting measurements.
• Operates from 9 kHz to 1 GHz
• Five antenna factors with each probe for calculating absolute magnetic-field strength (dBµA/m) from dBµV reading of a spectrum analyzer.
• Comes with a 2-meter RG-223 coaxial cable and SMA (f)-to -type-N (m) adapter, and an SMA (f)-to-BNC (m) adapter for each probe.
• The close field probe set  includes both the HP / Agilent 11940A and 11941A probes for full coverage from 9 kHz to 1 GHz.
• Option E51 adds the HP / Agilent 8447F Option H64 dual preamplifier ( or HP / Agilent 11909A preamplifier ), a 36-inch  (914-mm) type-N cable, and a carrying bag for storage and protection of the entire set.

11940A Close Field Probe

• Frequency Range: 30MHz  - 1GHz
• Max Input Power: 0.5 W
• Connector: SMA female

11941A Close Field Probe

• Frequency Range: 9kHz  - 30MHz
• Max Input Power: 0.5 W
• Connector: SMA female

8447F-H64 Dual Preamplifier

• Band 1
• Frequency Range: 9kHz - 50 MHz
• Gain: 28 dB nominal
• Band 2
• Frequency Range: 100kHz - 1.3GHz
• Gain: 26 dB nominal

11909A Preamplifier

• Frequency Range: 9kHz - 1 GHz
• Gain: 32.5 dB nominal

Note: Either 8447F-H64 or 11909A will be supplied depending on availability when the 11945A-E51 system is ordered.