Agilent / Keysight 8565E Portable Spectrum Analyzer, 9 kHz to 50 GHz

The Agilent/Keysight 8565E is a portable spectrum analyzer delivering laboratory-grade signal analysis across 9 kHz to 50 GHz in a field-deployable package. Built to MIL-T-28800 rugged specifications, it operates reliably from −10 °C to +55 °C in harsh environmental conditions including rain exposure and high humidity. The instrument combines outstanding phase noise performance with displayed average noise levels reaching −149 dBm (10 MHz to 2.9 GHz, 1 Hz RBW) and dynamic range of 100 dB on-screen, enabling detection and characterization of weak signals in complex RF environments.

Technical Specifications

Frequency Coverage: 9 kHz to 50 GHz internal mixing; 18 GHz to 325 GHz with external mixing. Preselection above 2.75 GHz. Resolution Bandwidth: Fast digital RBW from 1 Hz to 2 MHz (1, 3, 10 sequence). Option 103 extends to 1 MHz in 1, 3, 10 sequence plus 2 MHz. Noise Floor: Displayed average noise level −149 dBm (10 MHz to 2.9 GHz, 0 dB attenuation, 1 Hz RBW); −145 dBm (2.9 to 6.46 GHz); −127 dBm (40 to 50 GHz). Amplitude Range: −149 dBm to +30 dBm displayed. Maximum input: +30 dBm continuous, +50 dBm peak pulse power (100 W). Frequency Counter: 1 Hz resolution selectable to 1 MHz; ±225 Hz accuracy at 1 GHz (5-minute warm-up). Environmental: Operating −10 °C to +55 °C; non-operating −51 °C to +71 °C. 95% humidity at 40 °C for 5 days. Drip-proof at 16 liters/hour/sq. ft. altitude capability to 15,000 feet.

Key Features

• Time-gated measurement for pulsed RF, TDMA, and burst-modulated signals


• Adjacent Channel Power (ACP) testing with digital modulation support


• Occupied bandwidth measurement (0.10 to 99.99 percent)


• Channel and carrier power analysis with 100 dB on-screen dynamic range


• Selectivity <15:1 (RBW ≥300 Hz) and <5:1 (RBW ≤100 Hz) for spectral isolation


• Measurement personalities for digital radio and phase noise characterization

Typical Applications Frequency verification, signal troubleshooting, occupied bandwidth compliance testing, weak signal detection in crowded spectrum, pulsed and modulated signal analysis, phase noise evaluation.

Compatibility & Integration Precision timebase supports synchronization with external references. Counter output compatible with standard laboratory equipment.