User's Guide

Rajant Corporation BreadCrumb
®
LX4 User Guide
03-100117-001 Version: 2.12
2.3 Antenna Connectors
The BreadCrumb LX4 provides up to four Type N female antenna connectors. One connector is
located on the front side of the enclosure (see Figure 6), the other three connectors are located on
the rear side of the enclosure (see Figure 4). In general, only one antenna port per radio is utilized.
Some BreadCrumb models offer the 900 MHz antenna diversity feature, in which case two antenna
ports on the 900 MHz radio are utilized. There are many different LX4 Models available, each with
a different configuration of radios and antennas. Each antenna connector will be labeled with the
frequency of its corresponding radio.
Because the antennas are mounted top and bottom and on opposite sides of the unit, the only viable
means of using the LX4 with all antennas directly attached to the device is by using the pole mount
option. Care should be taken to make sure the antennas, and therefore the pole is mounted plumb.
This is because most of Rajant's standard antennas are characterized by high-gain and therefore
small vertical beamwidth. The small vertical beamwidth necessitates the antennas to be plumb, so
that units using these antennas will see each other without a significant loss of signal strength.
Warning
To avoid possible damage to the BreadCrumb radio(s), always connect or
disconnect external antennas with the power to the BreadCrumb LX4 off.
2.4 19-Pin Amphenol Connector
The majority of the signals and features of BreadCrumb LX4 can be accessed through the 19-pin
Amphenol connector on the enclosure (see Figure 6 and Figure 5). The most important of these
interfaces are external power, Ethernet, and USB, which are described in more detail in the
following sections. The 19-pin Amphenol connector interfaces to the LX4 cable assembly that
provides access to input power, Ethernet and USB ports of the device.
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Figure 5: 19-Pin Amphenol Connector