Pickering Interfaces has published a book explaining PXI hardware and software basics. Now in its fourth edition, it provides useful data for engineers working on test systems with switching systems and RF test requirements. The new edition includes an overview of the merging LXI and PXI Express standard. Topics covered vary from routing to power supplies through switching systems to explanations of intermodulation and RF mixer parameters. The book contains examples of test systems based on the PXI standard. The engineering data includes information on RF level uncertainty caused by VSWR. The section on switching includes information on switching configurations and definitions and an overview of optical systems. Copies of the Fourth Edition can be obtained free of charge by contacting your local Pickering Interfaces sales office or by filling in the enquiry form situated at the link below.