10 Keysight E8257D/67D & E8663D PSG Signal Generators Installation GuideSafety InformationWarnings, Cautions, and NotesWarnings, Cautions, and NotesThe following safety notations are used throughout this manual. Familiarizeyourself with each notation and its meaning before operating the signalgenerator.General Safety ConsiderationsThis product complies with the WEEE Directive (2002/96/EC) marking requirements. The affixed labelindicates that you must not discard this electrical/electronic product in domestic household waste.Product Category: With reference to the equipment types in the WEEE Directive Annex 1, this product isclassed as a “Monitoring and Control instrumentation” product.Do not dispose in domestic household waste.To return unwanted products, contact your local Keysight office, or seehttp://www.keysight.com/environment/product/ for more information.Warning denotes a hazard. It calls attention to a condition or situation that couldresult in personal injury or loss of life. Do not proceed beyond a warning until theindicated conditions or situations are fully understood.Caution calls attention to a possible condition or situation that could result in theloss of a user’s work, damage, or destruction of the signal generator. Do notproceed beyond a caution until the indicated conditions are fully understood.Note calls the user’s attention to an important point, or special information, withinthe text. It provides operational information or additional instructions of which theuser should be aware.Personal injury may result if the signal generator covers are removed. There are nooperator serviceable parts inside. To avoid electrical shock, refer servicing toqualified personnel.