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National Time and Signal; Wixom, Michigan (1877–Present)(Introduces the world's first pneumatically controlled master clock system.) New England Clock Company; New Haven, Connecticut (1959–2000) New Haven Clock Company; New Haven, Connecticut (1853–1959) Parker & Whipple; Meriden, Connecticut (1795–1868)
Between 31 and 39 seconds past the minute inclusive, the once-per-second tones are reduced to 10-millisecond "ticks" while a digital time code is transmitted. The digital time code is formatted so that a Bell 103-compatible 300-baud modem can decode it, [5] and CHU is the only time signal station that uses this format for its time code ...
A standard frequency and time signal service is a station that operates on or immediately adjacent to 2.5 MHz, 5 MHz, 10 MHz, 15 MHz, 20 MHz, and 25 MHz, as specified by Article 5 of the ITU Radio Regulations (edition 2012). [2]
The National Research Council Time Signal was Canada's longest running radio program, begun 5 November 1939 until its final broadcast on 9 October 2023. [1] Broadcast daily shortly before 13:00 Eastern Time across the CBC Radio One network, it lasted between 15 and 60 seconds, ending exactly at 13:00. [ 2 ]
In March 2001, the Observatory was renamed to National Time Service Center of the Chinese Academy of Sciences. [1] NTSC includes short-wave and long-wave standard time and frequency radio stations. And in 2007, low-frequency time signal station began trial broadcasting from Shangqiu. [2]
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WWV Transmitter Building (2002 or earlier) WWV's 15 MHz antenna WWV is a shortwave ("high frequency" or HF) radio station, located near Fort Collins, Colorado.It has broadcast a continuous time signal since 1945, and implements United States government frequency standards, with transmitters operating on 2.5, 5, 10, 15, 20, and 25 MHz. [1]
WWVH antenna field. WWVH is the callsign of the U.S. National Institute of Standards and Technology's shortwave radio time signal station located at the Pacific Missile Range Facility Barking Sands, in Kekaha, on the island of Kauai in the state of Hawaii