CME6005 Datasheet, PDF (9/16 Pages) List of Unclassifed Manufacturers – Single and dual band receiver IC

Preliminary Data Sheet CME6005 C-MAX
11 Information on the German Transmitter
(Customer is responsible to verify this information)
Station:
Frequency:
Transmitting power:
DCF 77
77.5 kHz
50 kW
Location:
Geographical coordinates:
Time of transmission:
Mainflingen/Germany
50° 01'N, 09° 00'E
permanent
Time frame 1 minute
(Index count 1 second)
Time frame
0
5
10 15 20 25 30 35 40 45 50 55 0
5
10
coding
when
required
Example: 19.35h
S
1
2
4
minutes
hours Calendar day month
year
day
of
the
week
8
10 20 40 P1 1
2
4
8
10 20 P2
seconds 20 ₂₁ 22 23 24 25 26 27 28 29 30 31 32 33 34 ₃₅
minutes
hours
Start Bit
Parity Bit P1
Parity Bit P2
Figure 15.
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)
Z2 = DST (wintertime = 200ms, otherwise 100ms)
A2 = Announcement of leap second
S=
Startbit of time code information
P1-P3 = Parity check bits
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.
CME6005
Revision
A.7
State
07.12.04
C-MAX printed
07.12.2004
Version
English
Page
9 of 16