Evaluation of measurement uncertainty on output power of Digital Radio Communication Testers by using microwave power meter

According to the Calibration Specification of Digital Radio Communication Testers, the output power of RF signal generator is one of the items must be calibrated, the output power from −50dBm to −10dBm is usually measured by microwave power meter, although the measurement uncertainty evaluation is given in the Calibration Specification of Digital Radio Communication Testers, but is imperfect, based on the principle of zero omission and no repetition adopted in measurement uncertainty evaluation, this paper reassesses the measurement uncertainty to make it more complete. The assessment process also applies to measurement uncertainty evaluation on output level of all kinds of signal generator by using microwave power meter.