User's Manual

21
Chapter 3: RF Communication
Generally, the system performance of the devices employing
radio communication technology is very sensitive to signal
interference and attenuation. This chapter addresses the
optimisation issue of radio frequency communication between
XCRF-500 reader series and electronic tag, which includes:
（1） Signal interference
（2） Signal attenuation
（3） Optimisation of system performance
3.1 Signal interference
Signal interference is the radio frequency (RF) signal caused
by the information exchange between reader and electronic tag.
Signal interference might seriously impair reader ’s ability to
read the data of electronic tag. The flashing of receiver
indicator indicates the existance of interference signal, and the
flashing frequency represents the extent of signal interference.
The sources of interference signal include:
ø Radio frequency (RF) system, e.g., RF local-area
network, nearby interactive identification system;
ø RF signal radiated from security gate, garage door or