Copyright by SKIDATA AG 2004
5
External Antenna DUO
KeyD ANT DUO
The external antenna can be used in applications
where the KeyDetector with integrated antenna is
not applicable and/or where a second KeyDetector
would be unneccessarily redundant.
Increases KeyDetector security
Signalling by red/green/orange LED
Design and outline dimensions similar to
KeyDetector
Can be mounted directly on a flat surface or
in a standard wall socket
KeyDetector
External
Antenna
Figure 9
Block diagram
Function scheme
KeyDetector
inside
Wall
outside External Antenna
2
2
Mounting Information
The data transmission between the external antenna
and data carriers is sensitive against electrical and
electro-magnetical fields. Those fields are produced
by electrical devices of any kind such as monitors, TV-
sets, ... Thus the external antenna must not be placed
near electrical devices. Also metal surfaces placed
near the external antenna have a strong impact on the
data transmission. For reliable operation no metal
objects should be within 10 cm around the external
antenna in any direction. If metal objects are placed
between the external antenna and a data carrier, data
transmission will be impossible at all in most cases.
