Title :
Programmable digitally synthesized source for low-frequency calibrations
Author :
Oldham, N.M. ; Hetrick, P.S. ; Parker, M.E.
Author_Institution :
Nat. Inst. of Stand. & Technol., Gaithersburg, MD, USA
fDate :
June 27 1994-July 1 1994
Abstract :
A digitally synthesized source (DSS) designed to calibrate low-frequency (0.1 Hz to 1 kHz) digital voltmeters and thermal converters is described. The DSS output voltage, frequency, and waveform are programmable over the General Purpose Interface Bus (GPIB). The rms value of the output voltage is calculated, with an uncertainty of less than 5 ppm, by measuring the dc voltage of each of the steps used to create the waveform.<>
Keywords :
calibration; computerised instrumentation; digital voltmeters; frequency synthesizers; function generators; peripheral interfaces; voltage measurement; 0.1 Hz to 1 kHz; GPIB; General Purpose Interface Bus; dc voltage; digital voltmeters; digitally synthesized source; frequency measurement; low-frequency calibrations; programmable digitally synthesized source; rms value; thermal converters; Calibration; Clocks; Counting circuits; Decision support systems; Digital-analog conversion; Electric variables measurement; Frequency; NIST; PROM; Voltage measurement;
Conference_Titel :
Precision Electromagnetic Measurements, 1994. Digest., 1994 Conference on
Conference_Location :
Boulder, CO, USA
Print_ISBN :
0-7803-1984-2
DOI :
10.1109/CPEM.1994.333328
