U4221B Datasheet, PDF (9/12 Pages) TEMIC Semiconductors – Radio Controlled Clock Receiver

U4221B
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.
TIME FRAME 1 MINUTE
( index count 1 second)
TIME FRAME
0 5 10 15 20 25 30 35 40 45 50 55 0 5 10
year
switch over to
the next time frame
0
1
500 ms 500 ms
month
day of
month
day
of
hour
week
minute
Parity
check
bits
Example:
March 1993
80 40 20 10 8 4 2 1 10 8
minute
identifier
BST
hour + minute
day of week
day + month
year
BST 7 GMT change
impending
93 7528
421
seconds 17 ₁₈ 19 ₂₀ 21 ₂₂ 23 ₂₄ 25 ₂₆ 27 _{28 29} 30
year
month
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.
TELEFUNKEN Semiconductors
9 (12)
Rev. A1, 15-May-96
Preliminary Information