Calibrating Frequency Data Collection Systems Using Shortwave Radio Signals

• Ron Estler ^[1]
  1. [1] Fort Lewis College

     Fort Lewis College

     Estados Unidos

     
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 77, Nº 9 (September), 2000, págs. 1244-1244
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • 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.