Keysight (Agilent) 3403C True RMS Voltmeter

The Keysight (Agilent) 3403C True RMS Voltmeter delivers precise AC and DC voltage measurements across a wide frequency spectrum. This versatile instrument measures DC voltage, true RMS AC voltage, and true RMS AC + DC voltage, making it essential for analyzing complex waveforms including modulated carriers, multiplexed signals, and signals with high harmonic content. Its true RMS capability ensures accuracy on non-sinusoidal waveforms where average-responding meters fail.

– Technical Specifications

Measurement Functions:
• DC Voltage
• True RMS AC Voltage
• True RMS AC + DC Voltage

Voltage Ranges: 10.00 mV (AC only), 100.0 mV, 1.000 V, 10.00 V, 100.0 V, 1000 V

Frequency Response:
• DC to 100 MHz
• AC Slow: 2 Hz to 100 MHz
• AC Fast: 25 Hz to 100 MHz

Response Times:
• Fast: 1 second (0.1% settling)
• Slow: 10 seconds (0.1% settling)

Display: 3½ digit LED

Input Impedance:
• 1 V–1000 V range: 10 MΩ ±10% shunted by 24 pF ±10%
• 10 mV and 100 mV range: 20 MΩ ±10% shunted by 20 pF ±10%

Crest Factor: 10:1 at full range

Maximum Input Voltage: 1000 V rms, 1500 V peak on any range; 500 V dc maximum in AC mode

Accuracy: 0.4% to 10%, dependent on range and frequency

Overrange: >90% on all ranges; front panel annunciators display overrange (~190% full scale) or underrange (~17% full scale) conditions

Recorder Output: 1 V dc open circuit at full range; 1 kΩ ±10% output resistance

Power: 115 V or 230 V ±10%, 48 Hz to 440 Hz, 35 VA maximum

– Key Features

• BNC front panel input connector with rear panel option via internal AC converter module repositioning
• Analog recorder outputs for chart recording integration
• Selectable Fast/Slow response modes
• Front panel overrange and underrange indication

– Typical Applications

Signal analysis in RF/microwave test environments, power supply verification, harmonic distortion measurement, and modulated signal characterization where true RMS measurement is critical.

– Compatibility & Integration

Optional features include autoranging (Option 001), remote control with digital output plus autoranging (Option 003), and dB display with adjustable reference level (Option 006). Dimensions: 127 mm H × 234.9 mm W × 196.8 mm D. Net weight: 5 kg.