The Keysight/Agilent/HP 8508A Vector Voltmeter is a precision dual-channel autoranging receiver for accurate RF voltage and phase measurements. This narrowband instrument delivers dynamic range exceeding 90 dB with sensitivity as low as 10 µV, enabling analysis of weak signals across its operating band. It measures voltage, phase difference, and ratios between two CW signals with 0.1 degree phase resolution across a ±180 to -180 degree range.
Technical Specifications
• Frequency Range: 100 kHz to 1 GHz (with 85081B High Impedance Input Module); 300 kHz to 2 GHz (with 85082A 50 Ω Input Module)
• Dynamic Range: Over 90 dB
• Sensitivity: As low as 10 µV
• Phase Resolution: Minimum 0.1 degrees
• Phase Measurement Range: +180 to -180 degrees
• Maximum Input: 2 V peak AC, ±50 Vdc (with 85081B); +16 dBm (with 85082A)
• Reference (A) Channel Minimum Input: 10 mV (100–300 kHz), 1 mV (300 kHz–3 MHz), 300 µV (3 MHz–1 GHz), -47 dBm (85082A), -57 dBm (3 MHz–2 GHz with 85082A)
• Noise Level (B Channel): 10 µV (-87 dBm with 85082A)
• Power Requirements: 100, 120, 220, 240 Vac ±5% to -10%, 48 to 440 Hz
• Power Consumption: Typically 40 VA
• Dimensions: 133 mm (H) × 426 mm (W) × 473 mm (D)
• Weight: 8.1 kg net
– Key Features
• Dual-channel measurements with autoranging capability
• Voltage and power display in linear or logarithmic units
• Normalized magnitude and phase angle computation
• Real and imaginary component analysis
• Built-in procedures for simple network analysis
• HP-IB (IEEE-488) interface for automated test systems
– Input Modules
• 85081B: High-impedance probe inputs, 100 kHz to 1 GHz
• 85082A: 50 Ω Type-N connectors, 300 kHz to 2 GHz
