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参数资料
| 型号： | CME8000-DB |
| 厂商： | C-Max |
| 文件页数： | 15/22页 |
| 文件大小： | 0K |
| 描述： | BOARD DEMO FOR CME8000 |
| 标准包装： | 1 |
| 系列： | * |
| 模块/板类型： | 演示板 |
| 适用于相关产品： | CME8000 |
| 其它名称： | 561-1006 |
C-MAX Time Solutions
15 Information on the German Transmitter
(Customer is responsible to verify this information)
Data Sheet
CME8000
Station:
Frequency:
Transmitting power:
DCF 77
77.5 kHz
50 kW
Location:
Geographical coordinates:
Time of transmission:
Time frame 1 minute
Mainflingen/Germany
50° 01'N, 09° 00'E
permanent
Time frame
(Index count 1 second)
0
5
10
15
20
25
30
35
40
45
50
55
0
5
10
coding
when
required
minutes
hours
Calendar
day
day
of
the
month
year
week
M=
R=
A1 =
Z1 =
Minute marker (100ms)
Second marker (200ms = transmission by reserve antenna)
Announcement of change-over to summer-time or vice versa
DST (summertime = 200ms, otherwise 100ms)
0.2s
0.1s
Z2 =
A2 =
S=
DST (summertime = 100ms, otherwise 100ms)
Announcement of leap second
Startbit of time code information
“1”
“0”
P1-P3 =
Parity check bits
Example of DCF77 data out:
2006 / 11 months / 8 days / 14 hours / 04 minutes
Protocol Bits
Control Bit
Protocol Identifier
1 2 3 4 5 6
1 2 3 4 5 67 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 45 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 34 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 23 4
... 0
... 1
coding
when
required
minutes
hours
Calendar
day
day
of
the
month
year
week
Modulation
The carrier amplitude is reduced to 25% at the
beginning of each second for a period of 100 ms
(binary zero) or 200 ms (binary one), except the
59 th second.
Time-Code Format (based on Information
of Deutsche Bundespost)
The time-code format consists of 1-minute time
frames. There is no modulation at the beginning of
the 59 th second to indicate 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 20 th second and 58 th second of the
time frame, including the start bit S (200 ms) and
parity bits P1, P2 and P3. Furthermore, there are
5 additional bits R (transmission by reserve
antenna), A1 (announcement of change-over to
summer time), Z1 (during summer time 200 ms,
otherwise 100 ms), Z2 (during winter time 200 ms,
otherwise 100 ms) and A2 (announcement of leap
second) transmitted between the 15 th second and
19 th second of the time frame.
SPEC No.
CME8000
Revision
B.15
State
09.03.07
C-MAX printed
03.05.2007
Version
English
Page
15 of 22
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