Title :
A wattmeter standard for the audio frequency range
Author :
Svensson, Stefan
Author_Institution :
Swedish Nat. Testing & Res. Inst., Boras, Sweden
fDate :
4/1/1999 12:00:00 AM
Abstract :
A wattmeter standard, based on digital sampling, has been designed and evaluated for the audio frequency range. The wattmeter is based on two commercially available sampling digital voltmeters (DVMs). The power spectrum is calculated with discrete Fourier transform (DFT) analysis. High accuracy is achieved by phase locking and equal-spaced simultaneous sampling
Keywords :
calibration; digital phase locked loops; digital voltmeters; discrete Fourier transforms; measurement standards; measurement uncertainty; phase measurement; power measurement; signal sampling; trigger circuits; wattmeters; 10 Hz to 20 kHz; ADC quantisation errors; DFT analysis; PC system; audio frequency range; calibration; coaxial shunt resistors; digital sampling; digital voltmeters; equal-spaced simultaneous sampling; high accuracy; inductive voltage divider; phase locking; phase measurement; power measurement; power spectrum; time jitter errors; trigger control circuit; uncertainty; wattmeter standard; Discrete Fourier transforms; Electric variables measurement; Frequency measurement; Phase measurement; Power measurement; Sampling methods; Signal sampling; Voltage control; Voltmeters; Wattmeters;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
