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參數(shù)資料
| 型號： | T4223B-MC |
| 廠商： | ATMEL CORP |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | Time-Code Receiver with A/D Converter |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, UUC22 |
| 封裝： | DIE-22 |
| 文件頁數(shù)： | 16/18頁 |
| 文件大?。?/td> | 138K |
| 代理商： | T4223B-MC |
U4223B
Rev. A7, 06-Mar-01
16 (18)
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
1
P1
0
1
2
3
5
4
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20
hours
P2
20 10
8
4
2
1
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
25
50
10
P
F
4
2
1
8
4
2
1
P
1
2
8
4
2
1
P
2
1
8
4
2
1
P
8
4
2
1
A
S
A
P
8
2
1
4
P
P
minutes
hours
days
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 27.
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
markers (FRM) with reduced carrier amplitude of 800 ms
duration.
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