User Manuals
Includes an introduction to the L4400 series product and modules, information on software installation and configuration, operating and programming, and calibration information.
2025-02-28
User Manuals
Configuration and programming information for the 34945A microwave switch/attenuator driver module.
2025-02-28
Application Notes
Learn practical tips to get an accurate temperature measurement, as well as how Keysight measurement systems help you to get a reliable measurement result.
2024-08-28
Application Notes
This paper discusses power handling of the hot switching and cold switching of EM switches, and how to avoid catastrophic failure of the switches. Learn more.
2023-06-09
White Papers
Low impedance sources can produce large and fast current transients when switching; creating problems with adjacent channels, transients in the ground circuit that upset digital logic connected to the DUT, or causing the switch unit to reset or hang. This application note describes several...
2022-10-07
Programming Guides
L4400 Series Programmer's Reference Version 1.01
2022-07-27
Data Sheets
This 9-page product overview of the Keysight L4445A microwave switch attenuator driver contains product specifications as well as detailed ordering information.
2022-06-09
Service Manuals
L4400 Series LXI Class C Instruments Service Guide
2021-11-30
Data Sheets
This data sheet provides technical specifications related to the L4490A and L4491A RF Switch platform.
2019-10-17
User Manuals
Includes switch and attenuator installation, configuration, and programming information.
2019-09-02
Configuration Guides
Introduction of the Keysight 34945A, L4445A, and L4490A/L4491A family of RF/Microwave switching instrument features, and assists in the three step process of selecting and configuring the systems.
2018-01-19
Application Notes
Discover 8 useful tips on how to optimize your switch matrix performance and important features to remember when designing your switching solution.
2017-12-02
Application Notes
Keysight electromechanical switches have a guaranteed 0.03 dB repeatability and long operating life help you to reduce measurement uncertainty in a system.
2017-12-01
Brochures
This brochure describes Keysight's RF and Microwave Switching Solutions and includes the product groups and key specifications.
2017-12-01
Application Notes
Learn about the main forms of solar cell testing methods, and how to decrease cost and increase flexibility for solar cell and module testing.
2017-12-01
Technical Overviews
Choose Keysight for confidence in your switching and measurements; this catalog will help you. Whether you use switching to route signals for design verification applications or for complex automated functional test systems, reliable and repeatable switching is critical for your measurement...
2017-12-01
Reference Guides
Version 1.0. Measurement commands, temperature commands, DAC configuration commands...
2015-07-28
Reference Guides
This document contains detailed internal memory information for the 34980A multifunction switch/measure mainframe and modules and the L44xxA series LXI switch and control instruments.
2015-07-23
Release Notes
Search Keysight Regulatory database for the most recent Declaration of Conformity statement for your product.
2014-08-01
Application Notes
Read useful tips to help you overcome challenges of solar cell and module IV curve measurements, and how to set up solar test solution for measurement success.
2014-07-31
User Manuals
User's guide to connecting instruments to PCs via USB, LAN, or GPIB interfaces.
2006-05-01
Help Files
This help file contains reference information to help you program Keysight L4400 Series products over the remote interface using the SCPI programming language.
2006-04-26
Training Materials
When communicating with a LAN instrument using TELNET, do the following...
2005-06-29
User Manuals
If connecting directly to an instrument using LAN (rather than through a server) there are some steps that can be taken to make the initial connection faster and get you up-and-running more quickly.
2004-11-01
L4400 Series LXI Class C Instruments User's Guide (.pdf 12.59 MB)
L4400 Series Programmer's Reference Version 1.01 (.zip 4.51 MB)