User's Manual

Product Features
Operating Modes
16 www.javad.com
1.5. Operating Modes
The operating modes for LMR400 can be set through the CLI, or through JRadio. The following
operating modes are available for LMR400:
1. Simplex operating modes (Simplex Base, Remote and Repeater) are developed primarily
for GNSS applications.
2. Half Duplex Base, Remote and Repeater are the alternative to Simplex operating modes
that are implemented based on half-duplex TDD protocol with dynamic bandwidth
allocation.
3. Sleep mode has automatic transmitter activation by an internal real-time clock, or by an
external controller through the data interface control lines (RTS).
4. The programmable automatic channel scanning of the Preferred Channels is an alternative
mode to the operation on the fixed Frequency Channel. In this mode, the Base is looking
for a “free of use” frequency channel while a Remote is looking for a Base to interact with.
5. Test mode supports the radio installation using Built-in test tools.
1.6. Management Tools
The built-in management tools along with JRadio running on PC compatible computer provide
the following benefits:
1. Easy user’s interface for system configuration and monitoring using well developed CLI
or intuitive GUI.
2. An ability to test the link using built-in test utilities without expensive external test
equipment such as spectrum analyzer and BER test analyzer.
3. An ability to monitor status, alarms and radio performance through the intuitive GUI.
4. LMR400 firmware upgrades and improvements can be downloaded to the units over serial
link locally or over-the-air remotely.
Note: Downloading over-the-air remotely is not requested by JAVAD GNSS for first release.
1.7. Security
The system will provide wireless media access protection as well as data encryption. The
following are its key features and benefits: