5.2.3 DCF77 / PZF Receiver
If both the antenna and the power supply have been connected the system is ready to operate. After power up
it takes up to three minutes for the receiver to synchronize, if reception is good enough. A high "Correlation &
Field" is an indicator for a good signal quality.
To check the field strength and the signal correlation value, select in the Front Panel "Reference Time
→
Info PZF
→
Correlation & Field".
The correlation "State" starts in a "raw" mode, when the receiver tries to find the initial correlation. When
good correlation has been found the receiver checks it 20 times: this state is labeled "check" and the correlation
value is increased from 1 to 20. If the correlation quality stays good the state changes to the "fine" mode. The
signal strength should be 100 or higher.
If no correlation with the incoming signal is possible then the clock changes automatically to DCF77 AM
reception mode and tries to decode the second marks.
For further detailed clock configuration, please refer to the Chapter
??
".
5.3 Cable Types
Antenna Type
Cable Type
Maximum Cable Length
Meinberg GPS Antenna
RG58
300 m / 1000 ft
Meinberg GPS Antenna
RG213
700 m / 2300 ft
Multi GNSS Antenna
Belden H155
70 m / 230 ft
Long Wave Antenna *
RG58
300 m / 1000 ft
Fiber Optic **
Fiber Optic
2000 m / 6500 ft
* DCF77 (Germany, Middle Europe), MSF (GB), WWVB (US), JJY (Japan)
** Fiber Optic - GOAL - GPS Optical Antenna Link; DOAL - DCF Optical Antenna Link
26
Date: 2nd July 2020
IMS - LANTIME M3000