Preface: This is the third edition of CAN/CSA-CISPR 22, Information technology equipment — Radio disturbance characteristics — Limits and methods of measurement, which is an adoption with Canadian deviations of the identically titled IEC (International Electrotechnical Commission) Standard CISPR (International Special Committee on Radio Interference) 22 (sixth edition, 2008-09). It supersedes the previous edition, published in 2002 as CAN/CSA-CEI/IEC CISPR 22 (adopted CEI/IEC CISPR 22:1997). Scope and object: This International Standard applies to ITE as defined in 3.1. Procedures are given for the measurement of the levels of spurious signals generated by the ITE and limits are specified for the frequency range 9 kHz to 400 GHz for both class A and class B equipment. No measurements need be performed at frequencies where no limits are specified. The intention of this publication is to establish uniform requirements for the radio disturbance level of the equipment contained in the scope, to fix limits of disturbance, to describe methods of measurement and to standardize operating conditions and interpretation of results.