Spectrum Analyzer 9kHz-2.9GHz, with option: 041 = HPIB and Parallel Printer Interfaces The Agilent (now Keysight) 8594E is a Spectrum Analyzer with a bandwidth from 9 kHz to 2.9 GHz and designed to perform complex tests simply and quickly with measurement personalities that support applications like cable TV/broadcast, component test, electromagnetic compatibility, lightwave, and wireless communications. Four slot cardcage Split screen display One-button measurement routines Advanced measurement functions Dual interfaces Built-in tracking generator