Agilent/Keysight 3400A

The Agilent/Keysight 3400A is a true RMS voltmeter that measures AC voltage amplitudes across a 10 Hz to 10 MHz frequency range. It delivers accurate RMS readings for both sinusoidal and non-sinusoidal waveforms, making it essential for broadband noise characterization and signal amplitude verification in test environments where precision matters.

– Technical Specifications

Measurement & Range
• True RMS AC voltage measurement
• Voltage ranges: 1 mV to 300 V full scale
• dB range: -72 to +52 dBm (0 dBm = 1 mW into 600 Ω)
• Frequency response: 10 Hz to 10 MHz

Accuracy
• ±5% of full scale (10 Hz to 50 Hz)
• ±1% of full scale (50 Hz to 1 MHz)
• ±2% of full scale (1 MHz to 2 MHz)
• ±3% of full scale (2 MHz to 3 MHz)
• ±5% of full scale (3 MHz to 10 MHz)
• Temperature coefficient: ±0.1% (0°C to 20°C and 30°C to 55°C)

Input Characteristics
• Input impedance: 10 MΩ shunted by <50 pF (0.001 V to 0.3 V); 10 MΩ shunted by <20 pF (1.0 V to 300 V)
• AC coupled input
• Crest factor: Up to 10:1 at full scale; up to 100:1 at 10% of full scale
• Maximum continuous input: 500 V AC peak at 1 kHz; 600 V DC on all ranges
• AC overload protection: 30 dB above full scale or 800 V peak, whichever is less

Output & Response
• DC output: 0 to 1 V DC proportional to deflection (10–100% full scale), max 1 mA, nominal source impedance 1000 Ω
• Output noise: <1 mV RMS
• Response time: <5 seconds to final value

Power Requirements
• 115 or 230 V ±10%, 48 to 66 Hz, 15 VA maximum

– Key Features

• Handles complex waveforms and broadband noise through true RMS conversion
• Wide dynamic range with frequency-dependent accuracy optimized for 50 Hz to 1 MHz operation
• Rear-panel DC output for integration with external plotters and recorders
• Compact module design with removable feet

– Physical Specifications

• Dimensions: 159 mm H × 130 mm W × 279 mm D (6.25" × 5.1" × 11")
• Weight: 3.3 kg (7.3 lb) net; 4.5 kg (10 lb) shipping

– Compatibility & Integration

This is an obsolete product. Operating and service manuals are available for reference.