Agilent/Keysight 35689A

The Agilent/Keysight 35689A is a 50 Ohm S-Parameter Test Set designed to extend the vector network analysis capabilities of the 3589A Spectrum/Network Analyzer. Operating from 10 Hz to 150 MHz, it delivers one-port and two-port measurements with ±0.25 dB amplitude accuracy. The test set combines analog swept techniques with digital signal processing to characterize device behavior in the frequency domain.

Technical Specifications

• Frequency Range: 10 Hz to 150 MHz


• Impedance: 50 Ohm


• Amplitude Accuracy: ±0.25 dB (typical)

Key Features

• Swept spectrum mode utilizes digital IF filters for high-speed measurements while maintaining amplitude accuracy and resolution


• Narrow band zoom mode employs Fast Fourier Transform (FFT) for accelerated measurements and enhanced resolving power on spans of 40 kHz and below


• Vector network mode provides complete frequency-domain characterization of S-parameters

Compatibility & Integration The 35689A integrates directly with the 3589A Spectrum/Network Analyzer via interconnect cable. The 3589A supports all three measurement modes - swept spectrum, narrow band zoom, and vector network analysis - with optional high stability frequency reference and time-gated spectrum analysis capabilities. A 75 Ohm version (35689B) is available for systems requiring different impedance matching.