Keysight frequently updates the N7649B online documentation (help system). Your software may not have the latest revision. This topic describes how to access and install the latest revision into your software.
Visit the product web page at http://www.keysight.com/find/n7649b.
Under the Technical Support tab, click Manuals. Links to both a downloadable compiled help file (.chm) and a web-viewable help system (webhelp) appear.
Compare the date shown for the .chm file on the web page to the compiled date shown on your software's installed help main menu page.
If the compiled date of your software's installed help system is earlier than the date shown on the web page, you can update your help file as follows:
Before installing the latest revision of the help file into your software, make sure it still supports the features of your current software revision. You can make this determination by carefully comparing the release notes of your current installed help system with the release notes in the latest help system. If the listed enhancements and bug fixes do not indicate significant feature changes, installing the latest help system is a good choice. Otherwise, you may want to consider downloading the latest version of software instead.
Move the existing installed help file to a safe place on your PC. This ensures you can restore it later if you discover the new help file does not suit your needs. If you installed your software with the default directories, the help file is located in the following directory:
C:\Program Files (x86)\Keysight\Test Case Manager\n7649b.chm
Download the latest help file (.chm) for your software from the Keysight website and copy it to the same directory from which you moved the existing help file in the previous step.
Verify that the new help file can be accessed from the software by selecting Contents, Index, or Search from the Help drop-down menu.