User's Manual

availability.maximal optional frequency number is 50pcs, frequency interval is
500KHz.
·Maximal reading distance up to 3.5~4.5m (11.48~14.75feet)（EIRP=36dBm,related
to tags.）
·Write distance:Distances up to70％ of the read distance under the same condition.
·Multi-tag reading rate:≧60 pcs/second（it’s related to protocol）
3 Design fundamentals
3.1 Device compose
As figure 4－1 and 4－2,XCRF-804 interrorgator has 5 parts:RF unit,
baseband unit,power unit、data interface unit、case unit.
figure 4－1 interrogator RF unit fundamental block diagram
figure 4－2 interrogator baseband unit fundamental block diagram
3.1.1 RF unit:
→The RF unit receive baseband signal and modulate carrier,then amplify the