BT/SN/RAM 6000 Series
Hardware Guide
2-27
Hardware Installation
Revised 2015-07-16
Antenna and Diversity
The Red Lion 6000 series modems except for the BT/SN/RAM-64xx series have two antenna connectors available,
labeled Antenna and Diversity.
•
Antenna:
This is the main antenna that is used for data transmission. It is mandatory to have the Antenna port
connected to an antenna.
•
Diversity:
This is the diversity antenna, used to improve on the signal strength obtained from the main
antenna. For SN/RAM-66xx/68xx units, this antenna is not mandatory for 3G connections, however it will
improve throughput in low signal and fringe areas.
Diversity/MIMO
This port is used for RX diversity on 3G connections and MIMO for LTE connections. Receive Diversity or MIMO is
a transmission technique that consists of using two separate antennas to achieve the most robust cellular signal
possible. Diversity will help achieve fast, reliable data throughput in applications that require a high amount of
bandwidth.
Note:
This antenna is not mandatory for 3G, however it is recommended and will improve throughput in low sig-
nal and fringe areas. For SN/RAM-67xx/69xx units, this antenna is required for compliance with LTE MIMO opera-
tion.
To get the best performance, this second antenna should be placed at a minimum of 5/8 of a wave length away
from the other antenna. Therefore, the minimum spacing for antennas in the 800 MHz frequency is 5/8 * 13.5” =
8.5”. The diversity antenna can be spaced further away than this, ideally in increments of 13.5”, 22”, 35”, etc. For a
1900 MHz only network, the optimal distance would be 5/8 * 6.2” = 4”. Orienting the antennas differently from
one another may also improve performance, particularly when the antennas are close together.
GPS Antenna Requirements
The GPS chipset used in this device is capable of GPS and Glonass signal reception.
This unit uses a 50 ohm active antenna only. It is used for receiving signals only. Ascertain that the GPS antenna
cabling uses an SMA-M type connector. For optimal results, the GPS antenna should be located so that is has clear
and unobstructed access to the sky.
Warning:
This device is not intended for use within close proximity of the human body.
Antenna installation should allow for a separation of at least 20cm from all personnel.
