User's Manual

101053
22
Figure 5
The i-PORT can connect up to four antennas using either the internal
multiplexer or an external multiplexer. The cable to connect the ILR-
CARD to the internal multiplexer is supplied with the i-PORT. To
connect an external multiplexer the coax cable to the ILR-CARD can
use a SMA connector with the supplied antenna pigtail as a connector
converter, or the coax will require an MMCX male end to connect
directly to the ILR-CARD.
For any antenna connection the maximum cable length allowed can
produce a decibel loss no greater than 6dB. Each coax cable type and
gauge will have different loss characteristics and the installer should
contact the cable supplier to determine the suitability any cable for their
application.
In most locations it is probable that null spots will exist in the coverage
of any single antenna. If a tag is in a null spot even though it is within
range of an antenna it will not be interrogated. This is typically not a
problem when tags are moving through a read zone, but if the tags must
be interrogated while stationary it will be necessary to create
redundancy in the read zone. Any stationary tag that must be
interrogated should be within range of at least two antennas.