Meinberg PZF600 - Manual (Page 24)

24
DCF-time including announcement of changes in daylight saving and announcement of
leap seconds, changing the timezone in the setup menu has no effect on the generation.
The coding sheme is given below:
0
10
20
30
40
50
R
M
1
4
2
1
20
10
8
4
2
1
P
2
2
0
1
0 8 4 2 1
2
4
8
10
1
2
4
8
10
2
0
4
0
8
0
P
3
A1
Z1
Z2
A2
S
1
2
4
8
1
0 2
0 4
0 P
1
Kodierung
nach Bedarf
Minute
Stunde
Kalendertag
Wochentag
Kalender-
monat
Kalenderjahr
M Minutenmarke (0.1 s)
R Aussendung über Reserveantenne
A1 Ankündigung Beginn/Ende der Sommerzeit
Z1, Z2 Zonenzeitbits
Z1, Z2 = 0, 1: Standardzeit (MEZ)
Z1, Z2 = 1, 0: Sommerzeit (MESZ)
A2 Ankündigung einer Schaltsekunde
S Startbit der codierten Zeitinformation
P1, P2, P3 gerade Paritätsbits
Time marks start at the beginning of new second. If a binary "0" is to be transmitted, the
length of the corresponding time mark is 100 msec, if a binary "1" is transmitted, the time
mark has a length of 200 msec. The information on the current date and time as well as
some parity and status bits can be decoded from the time marks of the 15th up to the 58th
second every minute. The absence of any time mark at the 59th second of a minute
signals that a new minute will begin with the next time mark. The DCF emulation output
is enabled immediately after power-up.
Realtime clock
The PZF600 includes a battery-backed realtime clock which runs crystal-precise in case
of power failure. A relativ accurate time is present immediately after power-up this way.
An additional RAM of the realtime clock is used to store important system parameters.
TIME_SYN output
This output is set to TTL-high if the receiver is in synchronous state (LED 'Free'
switched off). The output level changes to TTL-low if the receiver is in asynchronous
state for more than one hour. The TIME_SYN output is available at the VG-connector
and can be used to release an alarm, for example.