U4222B Datasheet, PDF (7/9 Pages) TEMIC Semiconductors – Radio Controlled Clock Receiver

TELEFUNKEN Semiconductors
U4222B
Information regarding Japanese Transmitter
Station: JG2AS
Frequency 40 kHz
Transmitting power 10 kW
Location: Sanwa, Ibaraki
Geographical coordinates: 36_ 11’ N, 139_ 51’ E
Time of transmission: permanent
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
minutes
hours
Example: 18.42 h
P0 40 20 10
days
code dut1
Time Frame
8 4 2 1 P1
20 10
8 4 2 1 P2
sec. 59 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
minutes
hours
frame reference marker (FRM)
position identifier marker P0
position identifier marker P1
0.5 s
”1”
0.8 s
”0”
0.2 s
”P”
0.5 second: Binary one
0.8 second: Binary zero
0.2 second: Identifier markers P0...P5
Figure 7.
93 7508 e
Modulation
The carrier amplitude is 100% at the beginning of each
second and is reduced after 500 ms (binary one) or after
800 ms (binary zero).
Time Code Format
It consists of one minute time frame. A time frame
contains BCD–coded information of minutes, hours and
days. In addition there are 6 position identifier markers
(P0 thruP5) and one frame reference markers (FRM) with
reduced carrier amplitude of 800 ms duration.
Rev. A1: 13.08.1996
Preliminary Information
7 (9)