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參數(shù)資料
| 型號(hào)： | T4223B-MF |
| 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(yè)數(shù)： | 14/18頁(yè) |
| 文件大?。?/td> | 138K |
| 代理商： | T4223B-MF |
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U4223B
Rev. A7, 06-Mar-01
14 (18)
Information on the British Transmitter
Station: MSF
Frequency 60 kHz
Transmitting power 50 kW
Location: Teddington, Middlesex
Geographical coordinates: 52
Time of transmission: permanent, except the first
Tuesday of each month from 10.00 h to 14.00 h.
22’N, 01 11’W
0
5
10
15
20
25
30
40
50
55
0
5
10
35
45
year
day of
month
month
day
of
week
hour
minute
minute
identifier
BST
hour + minute
day of week
day + month
year
BST 7 GMT change
impending
Time frame 1 minute
( index count 1 second)
Time frame
Parity
check
bits
8
4
2
1
8
4
2
1
8
4
2
1
1
2
1
8
4
2
1
2
1
4
2
1
1
8
4
2
4
2
1
4
8
2
1
0
0
500 ms
500 ms
Switch over to
the next time frame
80
40
20
10
4
2
1
10
8
8
4
2
1
18
19
20
21
year
22
23
24
25
26
27
28
29
30
month
17
seconds
0
1
Example:
March 1993
Figure 25.
Modulation
The carrier amplitude is switched off at the beginning of
each second for a period of 100 ms (binary zero) or
200 ms (binary one).
Time-Code Format
The time-code format 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 switched off for a period of 500 ms.
The prescence of the fast code during the first 500 ms at
the beginning of the minute in not guaranteed. The trans-
mission rate is 100 bits/s and the code contains
information of hour, minute, day and month.
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