VIZMONET BreadCrumb Wireless Nodes (ES1-2450R) : User's Guide : Page 51

antennas. There is no restriction for the separation between the antennas from the same transceiver, but

testing at installation is recommended to verify the system performance that is achieved with a specific

antenna deployment configuration.

Warning

For installations that will experience vibration or shock, all antennas should be externally mounted and

attached to the ES1 using cables. Low loss RF cable such as LMR-400 is recommended for cable at-

tached antennas. If a radio port is not required for a given application, the port should be disabled in

software using BC|Commander, and a 50 Ohm terminator should be installed.

DFS Additional Antenna Separation

For 5 GHz transceivers using channels that require DFS radar detection, it is recommended to mount

each antenna for a DFS channel at least 2 feet from any other 5 GHz transceiver’s antenna.

Figure: Incorrect Antenna Placement (ME4 shown)

Summary

• Each antenna must be installed at least 20 cm from the antennas of any other transceivers.

• For locations with vibration or shock, no antennas should be directly attached to the BreadCrumb.

• For antennas connected to the BreadCrumb via cables, low loss cabling such as LMR-400 is recom-

mended.

• Any unused antenna ports should be disabled in BC|Commander and have a 50 Ohm terminator in-

stalled.

• Antennas in fixed locations should be installed plumb and at the same elevation.

• The BreadCrumb and its antennas must be located a distance from any persons when operating.

The minimum distance for this model is stated in the the FCC chapter of this guide.

Also Note:

• Power to the BreadCrumb should be OFF when attaching or removing antennas or terminators.

• To reduce shock and vibration, BreadCrumbs on mobile equipment should be mounted in or on the

cab.

• See Physical Placement and other Considerations regarding Line of Sight and Fresnel Radius.

• Mounting hardware for cabled antennas may be purchased from Rajant.

• 5 GHz channels requiring DFS radar detection may get false triggers if antennas are placed near re-

flecting surfaces/objects or other electrical or radio equipment.

D.5 Grounding and Surge Protection

Warning