To find out the current firmware version of your MRX unit, press the power button to turn it on. After the startup animation, the firmware version will be displayed on startup (ie. VER 1.2).

Current Firmware Version

2.9 (1.9 for non-installed systems)

Change History

Version 2.9

• User can now select ground or flight mode during startup sequence

Version 2.8

• Unit now indicates when in ground mode in traffic page

Version 2.7

• Updated alert parameters for 5NM range: advisory at 1.5NM, alert at 0.9NM

• Updated local transponder page to display "ALT" if altitude is from internal altimeter, "TRA" if from transponder

Version 2.6

• Reduced volume baseline

Version 2.5

• Minor traffic algorythm update

Version 2.4

• Changed altitude threshold for local host to +/-700 ft. allowable tolerance
• Added Battery Life Indicator (in both startup and "local" sequences)
• Minor temperature and traffic algorythm update

Version 1.4 - 1.9

• Matches 2.4 - 2.9 changes for non-installed systems

Version 1.3

• Changed Low Bat threshold

Version 1.1 to 1.2

• Corrected pressure altimeter issue when pressure altitude is sea level or lower
• Corrected pressure altimeter issue to prevent skips in calibration steps in admin menu
• Corrected audio problem for alerts issued at a specific relative altitude
• Revised ranging algorithms in 0.1NM to 0.9NM fields

Version 1.1

• Changed default altitude 2000 feet
• Revised pressure altitude / thermal auto adjustment

Initial Release: 1.0 (12/2005)