Keysight DFB Laser Source Module User’s Guide 9Getting Started with DFB Laser Sources 1Line Power RequirementsThe Keysight 81663A DFB Laser Source Module operates when installed inthe 8163A/B Lightwave Multimeter,8164A/B Lightwave MeasurementSystem, or 8166A/B Lightwave Multichannel System.Operating EnvironmentThe safety information in the 8163A/B Lightwave Multimeter, 8164A/BLightwave Measurement System, and 8166A/B Lightwave MultichannelSystem User’s Guide summarizes the operating ranges for the Keysight81663A DFB Laser Source Module. In order for this module to meetspecifications, the operating environment must be within the limitsspecified for the mainframe.Storage and ShipmentThe module can be stored or shipped at temperatures between −40°C and+70°C. Protect the module from temperature extremes that may causecondensation within it.Environmental InformationThis product complies with the WEEE Directive (2002/96/EC) markingrequirements. The affixed label indicates that you must not discard thiselectrical/ electronic product in domestic household waste. ProductCategory: With reference to the equipment types in the WEEE DirectiveAnnex I, this product is classed as a "Monitoring and Controlinstrumentation” product. Do not dispose in domestic household waste. Toreturn unwanted products, contact your local Keysight office, or seehttp://about.keysight.com/en/companyinfo/environment/ takeback.shtmlfor more informationWARNING To avoid hazardous electrical shock, do not perform electrical tests whenthere are signs of shipping damage to any portion of the outer enclosure(covers, panels, etc.).WARNING You MUST return instruments with malfunctioning laser modules to aKeysight Technologies Service Center for repair and calibration.