SIMPLE_WWV_CHECK

Published:2009/7/11 2:04:00 Author:May | From:SeekIC

Permits making accurate check of local frequency standard quickly and easily by direct comparison with WWV signctls. Uses one receiver. Two signals, at0 and 180°, are obtained from local standard clock. Switch 12AU7 alternately connects one triode detector output and 0°signal simulta-neously to antenna, and then other triode detoctor output simultaneously with 180°signal.Doppler error is minimized by averaging hourly 3-minute readings over 8-hour period.Accuracy is one part in 100,000,000.-J. F.Brumbach, Fast WWV Check of Frequency Standard, Electronics, 32:13, p76-79.



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