1 Introduction18 Keysight 8480 Series Operating and Service ManualSafety ConsiderationsThe warning that follows is related to possible personal injury.8480 series, Options8485A and 8485D option 033The 8485A and 8485D power sensors with option 033 are calibrated to measurepower levels in the 50 MHz to 33 GHz frequency range. In all other respects, theyare the same as their respective standard power sensor.Accessories SuppliedAccessories are required to connect various power sensors to the power meter's50 ohm, Power Reference (1 mW, 50 MHz) output connector (Type-N (f)).8483A 75 ohm sensorThe 8483A sensor is supplied with an adapter, shown in . This accessory is amechanical adapter only, not an impedance transformer, therefore an impedancemismatch exists that must be taken into consideration when calibrating the powermeter and sensor. The REF CAL FACTOR, on the power sensor label, has beenadjusted for the impedance mismatch. This REF CAL FACTOR, when used tocalibrate any power meter, will allow calibration to 1.000 mW. The CAL FACTOR,CAUTION Removal of the D-ring that is on the sensor assembly WILL VOID THEWARRANTY. The input connector on the sensor has a D-ring to prevent thesensor from being connected to a high power source when its attenuator isnot attached. The sensor must only be connected to the power meter forcalibration or to the high power attenuator for RF measurement.WARNING The high power attenuator contains a substrate of beryllium oxide. Berylliumoxide in a powder form is a hazardous material and may be injurious to yourhealth if inhaled. Do not perform any operation on the beryllium oxide thatmight generate dust. Defective attenuator should be returned to KeysightTechnologies for proper disposal.
