Here’s the page we think you wanted. See search results instead:


Contact an Expert

Test Automation Developer’s System

The Keysight KS8400A Test Automation Developer’s System provides powerful, flexible and extensible test sequence and test plan creation with additional capabilities that optimize your test software development and overall performance. Keysight TAP is a modern Microsoft .NET-based application that can be used stand-alone or in combination with higher-level test executive software environments. Leveraging C# and the power of Microsoft Visual Studio, TAP is not just another programming language. It’s a platform upon which you can build your test solutions, maximizing your team’s productivity by using your existing software development tools and infrastructure.


  • Resources can be opened when a given test step needs them, not when a test plan starts
  • PackageDependency versions now update when creating a package
  • Enable/Disable of SCPI logging
  • Resource properties can have placeholder arguments, so they can map to any compatible resource at execution time
  • Using Shift to select multiple test steps no longer expands test steps that are collapsed
  • The behavior of the Repeat button simplified
  • Scrollbar now follows selected step when scrolling up with arrow keys
  • Fixed incompatibility issue with Dependency Resolution with .NET 4.7.1 installed
  • Fixed issue with installing packages from network drive
  • Numberous other features, improvements, and bug fixes (see Release Notes)
Release Date Version Version Description

Free Trial Available

2018-08-16 8.5.456 TAP 2018 Update 4 Developer System

How to Download

  • 1. Click the Download button.
  • 2. Save or Run the installer.

How to Install

  • Double-click on the downloaded software file to run the installer


Supporting Documentation


Installs on:


Operating System

  • Windows 8
  • Windows 7
  • Windows 10


Related Links