The Keysight (Agilent) 85671A Phase Noise Measurements Utility is a downloadable software application that transforms compatible 8560 E-Series spectrum analyzers into dedicated phase noise measurement instruments. The utility automates characterization of phase noise across oscillators and RF components by eliminating manual tuning, calculation, and plotting tasks. Three measurement modes—Log Plot, Spot Frequency, and RMS Noise Calculation—deliver phase noise data in dBc/Hz, with results displayed graphically or numerically. Integrated filtering and smoothing options balance measurement repeatability against acquisition speed, while a guided configuration menu simplifies parameter setup and adjustment via softkeys.
Technical Specifications
Carrier Frequency Range (Host Analyzer Dependent)
• 8560E/EC: 30 Hz to 2.9 GHz
• 8561E/EC: 30 Hz to 6.5 GHz
• 8562E/EC: 30 Hz to 13.2 GHz
• 8563E/EC: 30 Hz to 26.5 GHz
• 8564E/EC: 30 Hz to 40 GHz
• 8565E/EC: 30 Hz to 50 GHz
Offset Frequency Range: 10 Hz to ≤100 MHz
Dynamic Range & Input Levels
• Maximum input signal: +17 dBm (Ref Level = −50 dBc/Hz)
• Minimum input signal: −17 dBm (optimum dynamic range; 10 dB attenuation)
• Amplitude accuracy: ±2.5 dB (signal ≥10 dB above noise floor)
• Amplitude repeatability: ±1.5 dB (maximum filtering, 12-point smoothing)
Measurement Parameters
• Maximum frequency span: 5 decades (whole decades only)
• Log graph frequency accuracy: ±5%
• Filtering levels: 4 available
• Smoothing options: 12-point (2%), 24-point (4%), 48-point (8%), 96-point (16%)
– Key Features
• Direct phase noise readout via spot frequency cursor positioning
• Automated multi-offset tuning eliminates manual frequency stepping
• Variable filtering controls measurement repeatability and speed trade-off
• Automated graphical plot generation
• Internal memory storage for trace data
• Hardcopy output capability for log graphs
• Remote programming support with reference guides
– Typical Applications
• Oscillator phase noise characterization
• RF component phase noise testing
• System-level phase noise assessment
– Compatibility & Integration
The utility operates exclusively with Keysight 8560 E-Series spectrum analyzers (8560E/EC through 8565E/EC).
