The Keysight (Agilent) 432A is a self-balancing analog power meter engineered for precise RF power measurements across laboratory and field environments. Operating from 10 MHz to 40 GHz with temperature-compensated thermistor mounts, it delivers ±1% full-scale accuracy across seven measurement ranges spanning 10 µW to 10 mW, with optional higher precision of ±0.2% ±0.5 µW through direct thermistor bridge voltage measurement.
Technical Specifications
• Power Range: 10, 30, 100, and 300 µW; 1, 3, and 10 mW with dBm calibration from −20 dBm to +10 dBm in 5 dB increments
• Accuracy: ±1% of full scale (0°C to +55°C); ±0.2% ±0.5 µW via bridge voltage measurement
• Noise: <0.25% of full scale (peak, typical)
• Response Time: 35 ms time constant at recorder output
• Zero Carryover: <0.50% of full scale on most sensitive range
• Calibration Factor Control: 13-position switch, 100% down to 88% in 1% steps
• Frequency Range: 10 MHz to 40 GHz
• Recorder Output: 1.000 V at full-scale deflection (±0.5% accuracy), 1000 Ω impedance, BNC connector; VRF and VCOMP outputs on rear panel
• Bridge Resistance: Selectable 200 Ω or 100 Ω
• Power Requirements: 115 or 230 Vac ±10%, 48–440 Hz, max 13 VA
• Optional Battery: Up to 20 hours continuous operation with automatic recharge
– Key Features
• Taut-band suspension meter with individually calibrated, mirror-backed scales
• Milliwatt scale exceeds 100 mm in length for precise reading resolution
• Automatic fine zero operation via front-panel switch
• RFI compliance to MIL-I-6161D
• Net weight: 6.5 lb (3 kg); with battery: 9.25 lb (4.2 kg)
– Typical Applications
RF power level characterization, thermistor mount calibration verification, and precision power monitoring in metrology and manufacturing test environments.
