Model Number Codes; Spread Spectrum Radios-How Are They Different; Typical Applications; Multiple Address Systems (Mas) - GE TransNET 900 Reference Manual

• 2400–2482 MHz ISM band operation with the TransNET 2400
• User-selectable option to skip sub-bands with constant interference
• 65,000 available network addresses
• Network-wide configuration from the Master station eliminates most
trips to Remote sites
• Data transparency ensures compatibility with virtually all asynchronous
SCADA system RTUs
• Peak-hold RSSI averaged over eight hop cycles
• Operation at up to 115,200 bps continuous data flow
• Store-and-Forward repeater operation
• Data latency typically less than 10 ms
• Same hardware for Master or Remote configuration
• Supports RS/EIA-232 and RS/EIA-485 user interface
• Low current consumption; typically less than 3 mA in "sleep" mode
NOTE: Some radio features may not be available on all models, or limited by the op-
tions purchased, or the applicable regulatory constraints for the region in which
the radio will operate.

2.2 Model Number Codes

The radio model number is printed on the label on the end of the radio's enclo-
sure. It provides key information about how the radio was configured when it
was shipped from the factory. This number is subject to many variations
depending on what options are installed and where (country) the product is
used. Contact the factory if you have questions on the meaning of the code.
2.3 Spread Spectrum Radios—
How Are They Different?
The main difference between a traditional (licensed) radio and the
MDS TransNET transceiver is that this unit "hops" from channel to channel
many times per second using a specific hop pattern applied to all radios in the
network. A distinct hopping pattern is provided for each of the 65,000 avail-
able network addresses, thereby minimizing the chance of interference with
other spread spectrum systems. In the USA, and some other countries, no
license is required to install and operate this type of radio system, provided
that RF power and antenna gain restrictions are observed.

2.4 Typical Applications

Multiple Address Systems (MAS)

This is the most common application of the transceiver. It consists of a central
control station (Master) and two or more associated Remote units, as shown
in Figure 2. An MAS network provides communications between a central
2 MDS TransNET Ref. Manual MDS 05-2708A01, Rev. F