Meinberg M900, Operating Instructions Manual, Page: 46 / 170

This message “State:row” indicates that the pseudo-random sequence is read into the
internal RAM for one second and the system tries to achieve a coarse
synchronization. This procedure starts after power-up or worse reception for more
than ten seconds.
If the coarse synchronization was successful, the receiver enters the state of fine-
correlation. The system tries to lock the received PZF as exact as possible to generate
a precise time frame. The display shows the correlation coefficient at the end of each
second, which can be in the range of 52 % to 99 %. A high value for the coefficient
should be achieved by choosing a suitable position for the antenna.
The essential part of the tracking is completed five seconds after the appearance of
'CORR:xx%' and the generation of pulses per minute and per second starts. Tracking
steps of three microseconds are possible each second until the internal real time clock
is synchronized (two minutes max.). Afterwards, corrections of the time frame are
executed per minute only.
The “Field” parameter will display the digitized value of the field strength in this
menu. There is a logarithmic relation between this value and the field strength. This
menu is useful for mounting the antenna
Setup PZF
Transmitter Distance
In this submenu the distance to the transmitter is entered for compensating the
propagation delay of the received pseudo-random code. This setting should be done
as exact as possible because the absolute precision of the time frame is influenced by
this value.
46
> Tr. Distance <
Init Time
Ignore Lock
Info PZF
->Setup PZF <-
Serial Outp.
PZF Rec. POS
Distance of
Transmitter
0000 km