Installation Manual

Antenna Tuning Unit (ATU) Installation
52 750.001.003
Revised June 1999
© 1999 AXCESS
TM
Inc.
Cabling the ATU
Figure 20 shows the cabling between the ATU and the Reader – and
between the ATU and the associated antennas.
RX Antenna
TX Antenna
READER
TX
RX RX
RXTX
TX
Antenna
Reader
ATU
Figure 20 ATU connections
IMPORTANT! All coaxial cable between the ATU and the Reader
must be RG-58/U with 50-ohm impedance (nominal), solid copper
center conductor, 55% tinned copper braid or better, 100% foil shield
coverage (for example, Belden 9310). Cable must be terminated at
both ends with 3-piece crimp type male BNC connectors. See
Appendix A: Coaxial Cable, page 101, for directions on how to
prepare the cable.