Agilent / Keysight 8568A Spectrum Analyzer

The Agilent/Keysight 8568A is a microcomputer-controlled spectrum analyzer that delivers RF and microwave signal analysis across 0.1 Hz to 1500 MHz. Built around a phase-lock synthesizer architecture with exceptional local oscillator spectral purity, it enables precise measurements from laboratory benches to field deployments.

Technical Specifications

• Frequency Range: 0.1 Hz to 1500 MHz


• Amplitude Measurement Range: –137 dBm to +30 dBm


• Input Coupling: 50 Ω DC coupled (BNC fused, 100 Hz–1500 MHz); 50 Ω AC coupled (Type N, 100 kHz–1500 MHz)


• Maximum Input Power: +30 dBm continuous (AC); ±50 V DC (AC coupled); 100 W pulse into >50 dB attenuation


• Resolution Bandwidth: 10 Hz to 3 MHz (1, 3, 10 sequence)


• Video Bandwidth: 1, 3, 10 sequence configuration


• Sweep Time: 20 msec to 1500 sec (full span)


• Frequency Accuracy: <1 × 10⁻⁹ parts/day aging; center frequency accuracy of ±(2% span + standard error × center frequency)


• Noise Floor: 70 dB below input signals ≤–30 dBm


• Dynamic Range: 70 dB in 10 dB steps

Key Features

• Phase-lock tuning system ensures synthesizer-grade frequency stability and accuracy


• Internal microcomputer control with internal bus architecture


• HP-IB (GP-IB) programmable interface for remote operation of most analyzer functions


• Analog outputs (X, Y, Z) support external CRT displays and X-Y recorder integration


• Operating temperature range: 0° to 55 °C with warranted performance

Typical Applications Signal characterization, narrow-bandwidth analysis, frequency stability evaluation, and distortion measurement in RF/microwave development and troubleshooting.

Compatibility & Integration

• Compatible with Agilent 8447D preamplifier (0.1–1300 MHz)


• Agilent 8444A Option 059 tracking generator integration available


• 8566AB retrofit kit installation supported