14
en | General
LECTUS select
2021-02 | 01 | F.01U.389.837
Installation manual
Bosch Security Systems B.V.
Influencing (reducing) the reading distance
The reading distance can be influenced due to different reasons. On the one hand this is
influenced by the medium (i.e. the data carrier) and on the other hand by the ambient
conditions of the antenna and the data carrier.
The following is a list of points that can reduce the reading distance:
–
"Shade" or shield the data carrier with metal, such as EC card in your wallet, key fob on
your key ring, etc.
–
No optimal coupling, i.e., the antenna surface of the data carrier is perpendicular (90 °) to
the antenna surface of the reader
–
Data carrier itself
–
key fob (small active antenna surface)
–
"bad" response from the data carrier (ID card / key fob)
–
combination ID card (e.g. LEGIC® / inductive, MIFARE / inductive etc.)
–
Metal in the "active" effective area of the HF field. The transmission energy is attenuated.
This point is particularly relevant when installing the reader components in metal front
panels (including metal columns, etc.).
