MXS System Description and Installation Manual
UM06945
© Sagetech Avionics 2022 Proprietary Confidential
Page 52 of 56
3
Transmit Power
Failure
This BIT monitors the Power Output of
every transmission and verifies there is no
significant reduction in power.
Test is part of the Continuous BIT suite of tests.
XPDR Fail Flag is set in the ACK message to the Host.
Attempt a Power cycle. The
unit is damaged if the failure
persists
2
Reserved
1
Reserved
0
Reserved
BIT3
7
(msb)
Input Power In
Range
This BIT reads the MXS supply voltage. If
the voltage is less than 10 V or greater
than 32 V, then the MXS sets the Supply
Voltage Failure indication; else clears it.
This flag is the inverted Supply Voltage
Failure bit.
Test is part of the Continuous BIT suite of tests.
XPDR Fail Flag is set in the ACK message to the Host.
Check the supply voltage, if
voltage is in range, attempt a
Power cycle. The unit is
damaged if the failure
persists
6
ICAO Address
Valid
The MXS quits responding to Mode S
interrogations and outputting ADS-B
Squitters (DF-17 and DF-11s) if the ICAO
Address received in the Host Installation
Message (and stored in non-volatile
memory) is equal to all zeros or all ones.
Test is part of the Continuous BIT suite of tests.
Consequences of a test failure are as stated in row #2.
System Fail Flag is set in the ACK message to the Host.
Input a valid ICAO address.
5
GPS Position Valid
Invalid GPS position Data
ADS-B Out messages that normally contain GPS
position data (Airborne and Surface Position
messages) will have ZEROs entered for GPS position.
System Fail Flag is set in the ACK message to the Host.
Provide the MXS with valid
GPS position data.
4
Reserved
3
Reserved
2
Reserved
1
Reserved
0
Reserved
