User's Manual

3 Design fundamentals
3.1 Device compose
As figure 4－1 and 4－2,XCRF-502C reader has 5 parts:RF unit, baseband
unit,power unit、data interface unit、case unit.
figure 4－1 reader RF unit fundamental block diagram
figure 4－2 reader baseband unit fundamental block diagram
3.1.1 RF unit:
→The RF unit receive baseband signal and modulate carrier,then amplify the
modulated carrier signals and transmit the signals by selected antenna.
→The unit receive the back scatter signal from the RFID tag.After demodulating ,
amplifying ,comparing the signals ,the unit transmit the signals up to baseband unit.
→The unit adjust output power and frequency of the antenna interface under the
control of the baseband unit.
3.1.2 Baseband unit: