User's Manual

MLX
TM
Mobile Platform
Communication System
User’s Manual
Page 5 of 18
About This Manual
This manual contains a description of the MLX
TM
Mobile Platform’s
Communication System designed by Modular Mining Systems (MMS). Its use is
intended for MMS personnel and clients who may be responsible for the system’s
operation.
System Description
The MLX
TM
Mobile Platform’s Communication System is based in two
components:
• MLX
TM
Mobile Hub
• Bi-directional Amplifier and Cavity Filter
• Omni-directional Antenna
MLX
TM
Mobile Hub
Internally the MLX
TM
Mobile Hub contains a radio that operates with the standard
IEEE 802.11g in the ISM 2.412 to 2.484 GHz frequency band. The modulation
schemes used are OFDM for data rates 6, 9, 12, 18, 24, 36, 48 and 54 Mbps,
reverts to CCK for 5.5 and 11 Mbps and to DBPSK/DQPSK for 1 and 2 Mbps.
The radio has two ports (Primary and Auxiliary) configured to operate in diversity
antenna mode. The diversity antenna mode scans the SNR of each port until one
is found to be above a predetermine threshold. Then the radio receives and
transmits only for this port (antenna) until it falls below the SNR threshold and the
scanning process is again initiated. In other words, the MLX
TM
Mobile Hub only
receives and transmits for one antenna at time.
Basic form of scanning diversity
Bi-directional Amplifier
The Bidirectional Amplifier is designed to be used for IEEE 802.11g standard,
providing up to 1W of AGC compensated transmit power and giving low noise
amplification in receive mode. It provides spectrally clean power amplification in
transmit mode.