Agilent/Keysight 35650A

The Agilent/Keysight 35650A is a modular mainframe serving as the central hub of the 3565S Multichannel Measurement System. It has power, cooling, triggering, and synchronization for dynamic signal analysis across vibration, acoustics, and control systems applications. Each mainframe accommodates up to 8 measurement modules and can be interconnected with additional units to scale system capacity to 496 input channels.

Technical Specifications

• Frequency Range: 64 µHz to 102.4 kHz


• Real-Time Bandwidth: Up to 102.4 kHz


• Display Update Rate: Up to 64 spectra/sec


• Data Throughput: Up to 2.6 Mbytes/sec via SCSI Interface


• Module Capacity: 8 measurement modules per mainframe


• Maximum Input Channels: 496 channels (fully expanded multi-mainframe configuration)

Key Features

• Modular architecture supports flexible configuration with signal processing, input, source, and specialized function modules


• Built-in 4 mA current source with charge amplifier for multi-transducer compatibility (voltage, charge, ICP-type)


• Signal conditioning via 51.2 kHz Input Module (35652A) delivers full-scale voltage range of 1.26 mVp to 39.8 Vp and charge range of −18 dBpCp to +72 dBpCp


• Dynamic range less than −80 dB relative to full scale


• Effective sample rates from 0.5 Hz to 262 kHz


• Buffered analog output for tape recorder integration


• High-speed SCSI data throughput to disk storage


• Multi-mainframe interconnection via dual system bus connectors

Typical Applications

• Vibration and shock analysis


• Acoustic measurement and analysis


• Control systems characterization


• Multi-channel transducer data acquisition

Compatibility & Integration The 35650A accepts specialized modules including signal processing modules (35651A/B/C), 51.2 kHz and 102.4 kHz input modules, 4- and 8-channel 12.8 kHz input modules, source modules, programmable DAC modules, tachometer/trigger modules, and SCSI throughput modules. Systems connect via back-panel system bus connectors for seamless expansion.