Keysight U2781A User’s Guide 7Regulatory MarkingsThe CE mark shows that the productcomplies with all the relevant EuropeanLegal Directives (if accompanied by ayear, it signifies when the design wasproven).The CSA mark is a registeredtrademark of the Canadian StandardsAssociation. A CSA mark with theindicators “C” and “US” means that theproduct is certified for both the U.S.and Canadian markets, to theapplicable American and Canadianstandards.The RCM mark is a registeredtrademark of the AustralianCommunications and Media Authority.This ISM device complies with theCanadian ICES-001.