Meinberg PZF510 - Manual (Page 7)

7
Installation
To achieve the technical data given in chapter 'technical specifications', the following
points must be observed.
Operating voltage
The clock operates with a single +5V supply. This voltage should be sourced by a
linear regulated power supply. If a switched mode power supply is used, the GND
access of the PZF510 should be grounded directly or via a capacitance of at least 0.1µF.
This connection avoids the signal-to-noise ratio reducing influence of harmonics of the
switched mode power supply.
Antenna
The PZF510 operates with a ferrite antenna which is damped to match the bandwith
needed for the correlation reception.
Assembly of antenna
The antenna has to be mounted as exactly as possible. Turning it out of the main
receive direction will result in less accurate time frames. The antenna must be placed
in longitudinal direction to the DCF-transmitter (Frankfurt). The nearness to micro-
computers should be avoided (PZF510 included) and the antenna should be installed
with a minimum distance of 30cm to all metal objects, if possible. A distance of
several meters to TV- or computermonitors must be kept.
After switching the PZF510 to the menu 'FIELD', the adjustment of the antenna can
be executed. The displayed value is proportional to the received field strength. The
best method of mounting the antenna is to look for the minimum field strength and
turn the antenna by 90° to maximum then. A high field strength on its own is no
guarantee for good conditions of receiption, because interfering signals within the
bandwidth of the receiver also have an effect on the displayed value.
The maximum interference immunity can be found by looking at the autocorrelati-
on coefficient (in percent) in the menu 'PZF-STAT'. The displayed value should be
close to 75% for best receiption.