Agilent/Keysight 34950A

The Keysight 34950A is a 64-bit digital I/O module engineered as a plug-in card for the 34980A Multifunction Switch/Measure Unit. It delivers 64 bidirectional lines organized as eight 8-bit channels, paired with 64 Kb pattern memory per bank, two counter/totalizer channels, and programmable clock generation. This module enables digital pattern simulation and capture, event counting, frequency measurement, and synchronized clocking in automated test systems and data acquisition environments.

– Technical Specifications

• Digital I/O: 64 bidirectional lines, configurable as eight 8-bit channels
• I/O Thresholds: Programmable polarity and thresholds from 0 V to 5 V per channel
• Output Drive: 24 mA source/sink current per line
• Pattern Memory: 64 Kb per bank (volatile), supporting pattern generation and capture to 10 MHz
• Handshaking: Configurable protocols per 32-bit bank
• Counter Channels: Two independent channels
• Counter Functions: Event counting, frequency, period, duty cycle, totalizing, pulse width measurement
• Counter Input: Up to 10 MHz
• Clock Output: Programmable 10 Hz to 20 MHz with divide-by-n capability

– Key Features

• Eight 8-bit channels with independent threshold and polarity configuration
• Dual D-sub 78-pin connectors enabling standard cable and terminal block integration
• Pattern memory supports synchronized handshaking on each 32-bit bank
• Two dedicated counter/totalizer channels with multi-function capability
• Programmable clock output with flexible frequency division

– Typical Applications

• Automated digital test and verification
• Real-time pattern stimulus and capture
• High-speed event and frequency counting
• System clock distribution and synchronization
• Multi-channel data logging and control

– Compatibility & Integration

The 34950A operates exclusively within the Keysight 34980A mainframe, a modular eight-slot chassis. The 34980A accommodates up to eight plug-in modules, enabling scalable test system configurations tailored to specific measurement and control requirements.