Agilent/Keysight 35651C

The Agilent/Keysight 35651C is the central processing module for the HP 3565S Multichannel Measurement System, managing system operations, data acquisition, and real-time signal processing across multiple measurement channels. It executes downloadable measurement programs, controls data flow to disk storage, and communicates with host computers via HP-IB while supporting external synchronization and triggering of multiple systems.

– Technical Specifications

• Processor: Motorola MC68020 CPU at 20 MHz with MC68881 floating-point coprocessor
• Digital Signal Processor: One Motorola 56002 DSP chip
• RAM: 1 Mbyte standard; expandable to 4 Mbytes (Option 104) or 16 Mbytes (Option 116)
• DSP Memory: 64k × 24 SRAM (X/P and Y configurations); 64k × 32 ROM (ROMØ and ROM1)
• System Clock: 20 MHz
• FFT Performance: 4.0 ms nominal for 1K complex block size with windowing and bit reversal
• Real-time Bandwidth: 51.2 kHz
• Module-to-Module Transfer Rate: 2.5 Msamples/sec maximum
• Signal Processing to Host Transfer Rate: 329 kbytes/sec
• Module-to-Signal Processing Memory Transfer Rate: 1.7 Msamples/sec
• Maximum Throughput: >1.3 Msamples/sec with HP 35659A module and Option AT3

– Key Features

• HP-IB (IEEE 488) interface conforming to IEEE Std 488-1978 for host communication
• RS-232 port for hardware diagnostics
• External SMB connectors for multi-system synchronization and triggering
• System synchronization and triggering support
• Flexible program download capability for custom measurement configurations

– Typical Applications

• Multi-channel dynamic signal analysis
• Real-time FFT-based signal processing
• Disk-based data acquisition and throughput management
• Networked measurement systems requiring external trigger synchronization

– Compatibility & Integration

Designed as the control module for HP 3565S systems. Interfaces with measurement modules via internal system bus and communicates with host computers and external systems through HP-IB, RS-232, and SMB connectors.