User's Manual

User’s Manual to XCRF-502E Reader

Internal use.only. Any transmission is not

allowed without permission.

The following are the factors that may become a barrier for the

transmission of RF signals:

Þ Closed spaces with cement walls, floors and ceilings;

Þ Metallic surface surrounding antennas or tags;

Þ Water or other liquids surrounding antennas or tags;

Nearly all the objects (furniture or partition) on the transmission

path of RF signals will cause attenuation in varied degrees. The RF

signal attenuation caused by barriers can be diminished to the

minimum extent by carefully adjusting the installation locations of the

antennas.

The reflex caused by the metallic or metalized surfaces on the

back of the electronic tags can also impact signal attenuation. In some

cases, such impact can slightly extend the read distance, while form

some blind angles within the read area. The commutation performance

between the electronic tags and the Reader will become significantly

deteriorated, if the tags are on such positions.

7.3.3 Optimization of System Performances

It is usually impossible to precisely predict the Reader system’s

performance under randomly specified circumstances (that’s because

of the complexity of electromagnetic radiation, including frequency

stability of the signal sources, the direction layout of the antennas, the

side lobes, and the surrounding environments). However, the