Title :
A TDM wattmeter with a 0.5-MHz carrier frequency
Author :
Filipski, Piotr S.
Author_Institution :
Nat. Res. Council of Canada, Ottawa, Ont., Canada
fDate :
2/1/1990 12:00:00 AM
Abstract :
The author describes a standard time-division-multiplexing (TDM) wattmeter with a constant average carrier frequency, no inherent phase error, and known systematic magnitude frequency error, as well as efforts to increase frequency bandwidth. The residual error of the wattmeter, after corrections, is below 100 p.p.m. up to 5 kHz. The meter is expected to find application in accurate power measurements under distorted and low power factor conditions, and as a transfer standard for interlaboratory comparisons
Keywords :
measurement errors; measurement standards; power measurement; time division multiplexing; wattmeters; 0.5 MHz; TDM wattmeter; carrier frequency; distorted power factor; frequency bandwidth; interlaboratory comparisons; phase error; power measurements; residual error; standard time-division-multiplexing; systematic magnitude frequency error; transfer standard; Amplitude modulation; Delay; FETs; Frequency synchronization; Operational amplifiers; Pulse width modulation; Switches; Time division multiplexing; Voltage; Wattmeters;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
