Meinberg PZF510 - Manual (Page 10)

10
PZF STAT
Informations about the decoding of the pseudo-random sequence are available in this
menu. The following texts may be displayed:
GSYNC
The pseudo-random sequence is read into the internal RAM for one second and the
system tries to achieve a coarse synchronisation. This procedure starts after power-up
or worse receiption for more than ten seconds.
K: xx%
If the coarse synchronisation was successfull, 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 77%. 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 appearence of
'K:xx%' and the generation of pulses per minute and per second starts. Tracking steps
of three microseconds are possible each second until the internal realtime clock is
synchronized (two minutes max.). Afterwards, corrections of the time frame are
executed per minute only. The direction of these steps is displayed by the characters '>'
or '<' behind the digits of the correlation coefficient.
FIELD
The digitized value of the field strength is displayed in this menu. There is a logarith-
mic relation between this value and the field strength. This menu is useful for
mounting the antenna, like described in chapter 'Assembly of antenna'.
SETUP
The user-specific parameters of the PZF510 are set in this menu. To avoid the erroneous
change of these parameters, it is not possible to enter the submenus by a simple pressing
of the 'Set'-key. The first submenu is entered if the 'Set'-button is pressed until the
character '*' is displayed behind the text 'SETUP' and the 'Menu'-key is actuated then.
The following submenus are selectable ('Set'-button and 'Menu'-key used as usual now):