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Calibrating Frequency Data Collection Systems Using Shortwave Radio Signals

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Ron Estler

Department of Chemistry, Fort Lewis College, Durango, CO 81301-3999

J. Chem. Educ., 2000, 77 (9), p 1244

DOI: 10.1021/ed077p1244

Publication Date (Web): September 1, 2000

Section:

History, Education, and Documentation

Abstract

The atomic-clock-derived audio tones broadcast on the National Institute of Standards and Technology (NIST) shortwave station WWV are used to calibrate computer frequency data collection systems via Fast Fourier Transforms (FFT). Once calibrated, the data collection system can be used to accurately determine the audio signals used in several instructional physical chemistry laboratory experiments. This method can be applied to virtually any hardware-software configuration that allows adjustment of the apparent time scale (digitizing rate) of the recorded audio file.

Keywords (Audience):

Upper-Division Undergraduate

Keywords (Domain):

Laboratory Instruction

Keywords (Feature):

Computer Bulletin Board

Keywords (Pedagogy):

Computer-Based Learning

Keywords (Subject):

Fourier Transform Techniques

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Received: August 03, 2009

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Calibrating Frequency Data Collection Systems Using Shortwave Radio Signals