Title :
A watt meter standard for the audio frequency range
Author_Institution :
Nat. Testing & Res. Inst., Boras, Sweden
Abstract :
A watt meter standard, based on digital sampling, has been designed and evaluated for the audio frequency range. The watt meter is based on two commercially available sampling DVMs. The power spectrum is calculated with DFT analysis. High accuracy is achieved by phase locking and simultaneous sampling.
Keywords :
calibration; digital voltmeters; discrete Fourier transforms; frequency response; measurement standards; measurement uncertainty; power measurement; signal sampling; voltage dividers; wattmeters; DFT analysis; PC control; amplitude frequency response; audio frequency range; coaxial shunt resistors; digital sampling; high accuracy; inductive voltage divider; measurement uncertainty; phase angle corrections; phase locking; power spectrum; sampling DVM; simultaneous sampling; trigger control circuitry; watt meter standard; Calibration; Circuits; Current measurement; Discrete Fourier transforms; Frequency measurement; Phase measurement; Resistors; Sampling methods; Signal sampling; Voltage control;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 1998 Conference on
Conference_Location :
Washington, DC, USA
Print_ISBN :
0-7803-5018-9
DOI :
10.1109/CPEM.1998.700048
