Keysight (Agilent) E5501B Phase Noise Measurement Solution, 50 kHz to 1.6 GHz

The Keysight E5501B Phase Noise Measurement Solution characterizes phase noise across 50 kHz to 1.6 GHz, with extension to 6 GHz at offset frequencies using external signal sources. Built for R&D and ATE environments, it measures VCOs, DROs, crystal oscillators, and synthesizers with measurement integrity and repeatability.

Technical Specifications

• Carrier Frequency Range: 50 kHz to 1.6 GHz (extendable to 6 GHz with HP 8665B)


• Offset Frequency Range: 0.01 Hz to 100 MHz


• System Noise Floor: Typically −180 dBc/Hz at offsets > 10 kHz


• System Spurious Response: Typically −120 dBc


• Phase Detector Input Power (carriers < 1.6 GHz): R input 0 to +23 dBm; L input +15 to +23 dBm


• Downconverter Input Range: 1 GHz to 6 GHz


• Measurement Accuracy: ±2 dB (offsets < 1.0 MHz); ±4 dB (offsets < 100 MHz)

Key Features

• Direct AM noise measurement and residual phase noise characterization


• Two-port device capability for additive noise measurement


• External noise input port (0.01 Hz to 100 MHz)


• Real-time phase noise and spur monitoring during device parameter adjustment


• Graphical software interface with single-sideband phase noise plots, integrated noise power, and Allan variance output


• Remote SCPI programming for ATE integration

System Components The E5501B comprises a 70420A phase noise test set, phase detectors, phase-lock loop circuitry, Pentium PC running Windows NT 4.0, PC digitizer, RF spectrum analyzer, and measurement software. Optional modules extend carrier frequency to 110 GHz, add RF reference sources, or include high-power input with phase and AM detection.

Compatibility & Integration Integrates with Keysight signal generators including 8662A, 8663A, 8643A, 8644B, 8664A/B, and 8665A for low-noise reference signals. Remote SCPI client enables automated testing in ATE systems.