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.