Agilent/Keysight 432C

The Agilent/Keysight 432C is a thermistor power meter delivering precise RF and microwave power measurements across a wide dynamic range. This legacy instrument employs a DC bridge circuit and thermistor mounts to achieve 0.2% accuracy, making it suitable for both laboratory and field deployment. The 432C features four selectable power ranges (10 µW, 100 µW, 1 mW, and 10 mW full-scale) with measurement capability from -70 dBm to +44 dBm, displayed on a 3-digit analog readout with 1-digit overrange.

– Technical Specifications

• Measurement range: -70 dBm to +44 dBm
• Accuracy: Up to 0.2% attainable
• Power ranges: 10 µW, 100 µW, 1 mW, and 10 mW full-scale
• Display: 3-digit analog with 1-digit overrange
• Automatic zeroing via front panel switch
• Recorder outputs: Analog and digital available
• Operating temperature: 0 to +55 °C
• Storage temperature: -20 to +60 °C
• Humidity rating: Up to 95% relative humidity at 40 °C
• Power requirements: 115 or 230 VAC ±10%, 48 to 440 Hz, 13 VA maximum
• Net weight: 6.5 lb (3 kg)

– Key Features

• DC bridge circuit topology for stable measurements
• Automatic battery option (Option 01): Rechargeable nickel-cadmium battery supporting up to 20 hours continuous operation with automatic recharge capability
• Optional battery configuration weight: 9.25 lb (4.2 kg)
• Fast, precise analog power readings
• RFI compliance to MIL-I-6161D
• EMC compliance: EN55011:1991 (Group 1, Class A) and EN50082-1

– Typical Applications

Laboratory RF and microwave power measurement; field service applications; power monitoring across multiple measurement scales.

– Compatibility & Integration

The 432C accepts 478A, 8478B, and 486 series waveguide thermistor mounts. Both analog and digital recorder outputs enable integration with external data acquisition and logging systems.