TELECOM Digest OnLine - Sorted: Using Cell Phone For Frequency Calibration Reference?

Richard Eldon BARBER (piano.tuner@yahoo.com)
2006年5月25日 07:58:29 PDT

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Some piano tuners calibrate electronic tuning devices using their cell
phone. Is this a good idea? Calling up NIST on the cell phone, you
can have 440Hz played to you. Is using a cell phone going to be a
stable frequency reference? Will the cell phone network actually be
able to preserve the frequency, say as 440.0000 Hz? or will there be
frequency domain quantization errors due to wavelet compression, thus
affecting the freq stability of the transmitted tone? Please post and
email ...

Thanks,
Richard Barber
piano.tuner@yahoo.com
http://pianoregulation.com

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