User's Manual

Rajant Corporation BreadCrumb® ME4 v11 User Guide
03-100126-011 Version 11.0.0
Figure 2: BreadCrumb ME4 Enclosure Features (Back)
2.3 Antenna Connectors
The BreadCrumb ME4 provides up to four Type N female antenna connectors. Two connectors are
located on the top side of the enclosure (see Figure 1), the other two connectors are located on the
bottom side of the enclosure (see Figure 2). In general, only one antenna port per radio is utilized.
Some BreadCrumb models offer antenna diversity or Multiple-Input and Multiple-Output (MIMO)
features, in which case two antenna ports per radio are utilized. There are many different ME4 Models
available, each with a different configuration of radios and antennas. Each antenna connector will be
labeled with the frequency of its corresponding radio.
Important
Most ME4 models do not support directly attaching antennas under FCC regulations.
When using the pole mount option for deploying the ME4, 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 ME4 turned off.
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