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參數(shù)資料
| 型號(hào)： | U4221B |
| 英文描述： | Radio Controlled Clock Receiver |
| 中文描述： | 電波鐘接收器 |
| 文件頁數(shù)： | 8/12頁 |
| 文件大小： | 169K |
| 代理商： | U4221B |
U4221B
TELEFUNKEN Semiconductors
Rev. A1, 15-May-96
Preliminary Information
8 (12)
Information Regarding German Transmitter
Station: DCF 77,
Frequency 77.5 kHz,
Transmitting power 50 kW
Location: Mainflingen/Germany,
Geographical coordinates: 50
Time of transmission: permanent
0.1’N, 09
00’E
0
5
10
15
20
25
30
40
50
55
0
5
10
coding
when
required
minutes
hours
day
of
the
week
month
year
35
45
21
22
23
24
minutes
25
26
27
28
30
29
31
32
hours
33
34
35
1
2
4
8
10
20
40
P1
1
2
4
8
10
20
P2
A
Z
Z
1
2
4
S
2
1
8
R
4
P
1
8
1
2
2
4
P
1
4
2
8
2
1
1
2
4
1
2
4
8
1
2
4
8
1
1
2
4
8
P
Time Frame 1 Minute
( index count 1 second )
Time Frame
calendar
day
20
sec.
s
Start Bit
Parity Bit P1
Parity Bit P2
Example:19.35 h
93 7527
A
Modulation:
The carrier amplitude is reduced to 25% at the beginning
of each second for 100 ms (binary zero) or 200 ms (binary
one) duration, excepting the 59th second.
Time Code Format: (based on information
of Deutsche Bundespost)
It consists of 1 minute time frames. No modulation at the
beginning of the 59th second to recognize the switch over
to the next 1 minute time frame. A time frame contains
BCD-coded information of minutes, hours, calendar day,
day of the week, month and year between the 20th second
and 58th second of the time frame, including the start bit
S (200 ms) and parity bits P1, P2 and P3. Further there are
4 additional bits R (transmission by reserve antenna), A1
(announcement of change-over to the summer time), Z1
(during the summer time 200 ms, otherwise 100 ms), Z2
(during standard time 200 ms otherwise 100 ms) and A2
(announcement of leap second) transmitted between the
15th second and 19th second of the time frame.
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相關(guān)代理商/技術(shù)參數(shù) |
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| U4221B-BFP | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Radio Controlled Clock Receiver |
| U4221B-BFPG1 | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Radio Controlled Clock Receiver |
| U4222B | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Radio Controlled Clock Receiver |
| U4222B-CFP | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Radio Controlled Clock Receiver |
| U4222B-CFPG1 | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Radio Controlled Clock Receiver |
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