The Keysight 34952A Multifunction Module expands the 34980A Multifunction Switch/Measure Unit with integrated digital I/O, analog output, and event counting in a single slot. This module delivers 32-bit configurable digital control, dual-channel ±12 V analog outputs, and a 32-bit totalizer with 100 kHz counting capability—enabling rapid test automation without external signal conditioning.
Technical Specifications
Digital Input/Output (DIO)
• Four 8-bit ports, configurable as 8, 16, or 32-bit operations
• TTL-compatible inputs and outputs with 400 mA sink current per output
• Input thresholds: V_in(L) 2.0 V
• Output levels: V_out(L) 2.4 V @ 1 mA
• Supports external open-drain pull-up to 42 V maximum
• Internal 5 V pull-up resistors on input-configured ports
• Pattern match or state-change alarm detection with 4 ms sampling interval
• Read/write speed: 95 operations per second
• Typical alarm latency to 34980A output: 5 ms
Digital-to-Analog Converter
• Two independent analog output channels
• Output range: ±12 V
• 16-bit resolution
• 10 mA maximum output current per channel
• Direct voltage programming via SCPI commands
Totalizer
• 32-bit resolution
• Maximum count rate: 100 kHz
• Rising-edge or falling-edge trigger selection
• Dual gate control: TTL high enables on Gate terminal; TTL low enables on Not-Gate terminal
• Read-only or read-with-reset operation modes
• Continuous counting when gate terminals unpopulated
– Key Features
• Single-slot installation in 34980A mainframe
• 50-pin D-sub connectors for direct cable, terminal block, or mass interconnect attachment
• Maskable alarm functions with fast state detection
• Front-panel readability for single 8-bit input port at a time
• Compatible with optional 34952T terminal block accessory
– Typical Applications
• Automated test systems requiring mixed-signal control and measurement
• Event counting and gating in production test environments
• Multi-channel analog signal generation synchronized with digital sequencing
• TTL logic interface and monitoring for digital device characterization
– Compatibility & Integration
Designed exclusively for the Keysight 34980A mainframe. Connects via standard 50-pin D-sub connectors. Integrates with the 34980A’s modular architecture for flexible measurement and switching configurations.
