Agilent/Keysight 70004A - 4-Slot Color System Display Mainframe for 70000 Series

The Agilent/Keysight 70004A is a 4-slot color system display mainframe serving as the front-end interface for the HP 70000 Series Modular Measurement System. It integrates a color CRT display with mainframe functionality, enabling simultaneous control and monitoring of up to four modular instruments. The unit combines a 7.5-inch diagonal display with flexible module accommodation supporting 1/8-, 1/4-, 3/8-, and 1/2-width modules, making it suitable for demanding R&D, manufacturing, and quality control applications in telecommunications and high-frequency electronics.

Technical Specifications

• 7.5-inch diagonal color CRT display


• 1024 × 400 pixel resolution


• 16 simultaneous colors selectable from 4096-color palette


• Integrated trace and marker capabilities Modular Integration


• 4 module slots with support for 1/8-, 1/4-, 3/8-, and 1/2-width modules


• Accommodates up to four 1/8-width modules at maximum density


• Single-keystroke instrument selection via INSTR key


• Frequency range capability: DC to 28 GHz and beyond (module-dependent) Interfaces


• HP-MSIB for high-speed digital communication between instrument modules


• HP-IB for standard instrument control and data transfer


• HP-HIL front-panel connector for external keyboards (Keysight 46021A, 98203C compatible) System Operation


• Removable custom hardkey panel with softkeys and digital-control knob


• Local and remote operation capability


• Mainframe and display separation up to 1.2 km


• Graphics output to HP-IB printer or plotter; HP PaintJet printer compatible for full-color documentation


• Advanced firmware with menu customization and real-time data capture tools


• Automated documentation with single-file test data storage

Key Features

• Simultaneous control of four modular instruments


• Support for over 50 available modules covering DC to microwave through lightwave measurements


• Flexible module slot configuration with mixed-width accommodation


• High-speed inter-module communication via HP-MSIB

Typical Applications Characterization and analysis in R&D, manufacturing, and quality control. Multi-instrument RF, microwave, and lightwave measurement systems requiring integrated display and control.

Compatibility & Integration Works with HP 70000 Series modules and standard HP-IB peripherals. Supports external keyboard interfaces and full color documentation workflows through HP PaintJet integration.