Keysight / Agilent / HP 46021A Keyboard

The Keysight 46021A is a specialized keyboard designed for direct integration with Keysight (formerly Agilent/HP) modular measurement systems. It functions as a Human Interface Link (HP-HIL) input device, connecting via proprietary HP-HIL connector to compatible instruments and displays. The keyboard maps eight function keys to softkey arrays on compatible spectrum analyzers and displays, with F1–F7 corresponding to right-hand softkeys and SHIFT+F1–F7 to left-hand softkeys. F8 (shifted or unshifted) accesses the USER softkey. Additional key mappings include MENU, System/DISPLAY, Shift+Reset/I-P, Shift+Print/PRINT, and CTRL+Shift+Print/PLOT functions.

Technical Specifications

Manufacturer: Keysight Technologies (formerly Agilent, Hewlett-Packard)

Model Number: 46021A

Interface Type: Hewlett-Packard Human Interface Link (HP-HIL)

Connector Type: HP-HIL connector

Protocol: Proprietary HP protocol; not compatible with standard PCs or Macs

Dimensions (L × W × H): 20 × 10 × 4 inches

Weight: Approximately 3.0 lbs

Cable: RJ11 connector cable may be included with some units

Key Features

Eight function keys (F1–F8) with dual-layer access via SHIFT modifier

Right-hand and left-hand softkey correspondence for efficient instrument control

Dedicated MENU, System/DISPLAY, and USER function keys

Shift-based access to I-P, PRINT, and PLOT functions

Layout optimized for Keysight Modular Measurement "C" System spectrum analyzers

Internal switch options including Fujitsu Leaf Spring (linear) and rubber dome mechanisms

Typical Applications Primary use with Keysight/Agilent/HP Modular Measurement "C" System spectrum analyzers for command input and parameter control. Provides intuitive operator interface for instrument configuration and data entry within compatible Keysight environments.

Compatibility & Integration Designed for Keysight Modular Measurement "C" System spectrum analyzers. Connects to HP-HIL ports on compatible displays such as the HP 70004A color display. Also referenced for use with HP 35721A terminals and HP 9000 series 300 and 400 systems. HP-HIL connection ensures full access to instrument capabilities through system-specific interface architecture.