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U4221B Datasheet(PDF) 9 Page - TEMIC Semiconductors |
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U4221B Datasheet(HTML) 9 Page - TEMIC Semiconductors |
9 / 12 page U4221B Preliminary Information TELEFUNKEN Semiconductors Rev. A1, 15-May-96 9 (12) Information Regarding British Transmitter Station: MSF Frequency 60 kHz Transmitting power 50 kW Location: Teddington, Middlesex Geographical coordinates: 52 _ 22’N, 01_ 11’W Time of transmission: permanent, excepting the first Tuesday of each month from 10.00 h to 14.00 h. 05 10 15 20 25 30 40 50 55 05 10 35 45 year day of month month day of week hour minute minute identifier hour + minute day of week day + month year TIME FRAME 1 MINUTE TIME FRAME ( index count 1 second) Parity check bits BST BST 7 GMT change impending 500 ms 500 ms switch over to the next time frame 80 40 20 10 42 1 10 8 8 4 2 1 18 19 20 21 22 23 24 25 26 27 28 29 30 year month 17 seconds 93 7528 0 1 Example: March 1993 Modulation: The carrier amplitude is reduced at the beginning of each second for the time of 100 ms (binary zero) or 200 ms (binary one). Time Code Format: It consists of 1 minute time frames. A time frame contains BCD-coded information of year, month, calendar day, day of the week, hours and minutes. At the switch-over to the next time frame, the carrier amplitude is reduced for 500 ms duration. |
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