User's Manual

25
3.3 Optimisation of system performance
Generally, it is impossible to precisely predict the system
performance of the reader under any given circumstance (the
root is the complexity of electromagnetic radiation, including
the frequency stability of signal source, the direction of antenna,
antenna side- lobes and the environment). However, the
suggestions below are instructive to optimising the system
performance in practice.
ø Elaborately design and install the antenna of reader.
The standard length of radio frequency cable between
antenna and reader is 10 meters. Over- lengthy radio
frequency cable will bring about attenuation of both
transmitted signal and received echo signal, which will
shorten the reading range.
ø Change in antenna connection or antenna type will
significantly affect the system performance.
ø Take the surrounding into consideration:
construction materials, office hours, windows and pipe
configuration, etc. Radio frequency field mode and