Agilent/Keysight 8591A

The Agilent/Keysight 8591A is a portable spectrum analyzer engineered for RF and microwave signal analysis across 9 kHz to 1.8 GHz. It delivers amplitude measurement from -115 dBm to +30 dBm with ±1.0 dB accuracy and integrates frequency, amplitude, and modulation measurement capabilities essential for characterizing complex signals. The instrument features a 7.5-inch CRT monochrome display and resolution bandwidth adjustable from 1 kHz to 3 MHz, supporting sweep times from 20 ms to 100 seconds. Frequency accuracy reaches 7.5 ppm standard, with optional precision reference achieving ±230 Hz at 1 GHz. The quasi-peak detector enables EMC compliance testing, while optional AM/FM demodulation with speaker and TV sync trigger supports audio signal analysis. Spurious performance includes second harmonic distortion below -70 dBc and third-order intermodulation distortion exceeding -70 dB for two -30 dBm tones separated >10 MHz. Internal memory stores up to 32 KBytes of user data plus nine complete front-panel states in battery-backed RAM. The 50-ohm input impedance (75-ohm option available) accepts both standard and optional tracking generator configurations. Optional HP-IB and RS232C interfaces enable remote control and automated measurement integration. Time-gated spectrum analysis, FFT processing, and expanded measurement functions address demanding troubleshooting and signal characterization requirements. Weighing 10.9 kg with dimensions of 213 mm H × 429 mm W × 483 mm D, the instrument operates from 86–127 or 195–250 Vrms at 47–66 Hz, with 400 Hz ±10% availability for airborne applications.