參數(shù)資料
型號: T4225B-MF
廠商: ATMEL CORP
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, UUC17
封裝: DIE-17
文件頁數(shù): 7/16頁
文件大?。?/td> 195K
代理商: T4225B-MF
T4225B
Rev. A3, 03-Dec-98
15 (16)
Information on the 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
0
5
10
20
30
40
55
0
5
35
45
seconds
40 20 10
8
4
2
1P1
0
12
3
5
4
6
7
8
9
1011 12 1314 151617 18 19 20
P2
20 10
8
4
21
hours
Time frame
15
minutes
0.5 s
0.8 s
0.2 s
“1”
“0”
“P”
0.5 second: Binary one
0.8 second: Binary zero
0.2 second: Identifier markers P0...P5
93 7508 e
25
50
10
PO
FR
M
40
20
10
8
4
2
1
P1
10
20
8
4
2
1
P2
20
0
10
0
80
40
20
10
P3
8
4
2
1
AD
D
SU
B
AD
D
P4
8
2
1
4
P5
P0
minutes
hours
da ys
P0
Frame-reference marker (FRM)
Position-identifier marker P0
Position identifier marker P1
Example: 18.42 h
Time frame 1 minute
(index count 1 second)
Time frame
dut1
code
59
Figure 26.
Modulation
The carrier amplitude is 100% at the beginning of each
second and is switched off after 500 ms (binary one) or
after 800 ms (binary zero).
Time-Code Format
The time-code format consists of 1-minute time frames.
A time frame contains BCD-coded information of
minutes, hours and days. In addition, there are 6 position-
identifier markers (P0 thru P5) and 1 frame-reference
marker (FRM) with reduced carrier amplitude of 800 ms
duration.
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