MXS System Description and Installation Manual
UM06945
© Sagetech Avionics 2022 Proprietary Confidential
Page 40 of 56
7.6
Send Operating message
Begin transmissions of the Operating Message (Type 0x03) to the MXS at 1 Hz.
Before going into “On” or
“Alt” make sure the antenna is adequately loaded. The data that is contained in the operating message is:
•
Operating Mode can be set to:
o
OFF
–
In this mode, transmitting and receiving is disabled. MXS is set to a low power mode
with minimal components active. OFF mode is set using the Operating Message. (See
ICD02373)
o
STANDBY
–
In this mode, transmitting is disabled, but the ADS-B in functionality is still
operational. STANDBY is set using the Operating Message. (See ICD02373). Receiver Self-
Test failures are not annunciated if you are in standby mode.
o
ON
–
In this mode the transponder is operational but inhibited from transmitting any
pressure altitude information. ON is set using the Operating Message. (See ICD02373)
o
ALT
–
In this mode the MXS is fully operational, including transmitting altitude, if available.
ALT is set using the Operating Message in ICD02373.
•
ADS-B Enable/Disable
o
Setting ADS-B to enable will enable ADS-B Extended Squitters (DF17)
o
With ADS-B Disabled the MXS will still send Acquisition Squitters (DF11) and it will still
receive ADS-B in data once the Target request message is sent. DF17 ADS-B out messages
will not be sent.
•
Power Up Store Mode
o
If the operating message is sent with this bit selected it will save the operating message
settings into NVM. If the MXS is power cycled it will power up as commanded by the last
operating message sent with the power up store mode bit selected.
•
IDENT
o
The Ident runs for 18 Seconds to help allow ATC to distinguish your aircraft on the
Secondary Surveillance Radar (SSR) Every time Ident is selected the 18 second timer is
restarted.
•
Emergency Status
o
The Emergency Status can be selected from the dropdown menu. The following
Emergency conditions can be selected from:
▪
No Emergency
▪
General Emergency
▪
Lifeguard/Medical
▪
Minimum Fuel
▪
No Communications
▪
Unlawful Interference
▪
Downed Aircraft
•
Squawk Code
o
The 4096 Squawk code is set using this field. If the Priority SQUAWK pin is grounded, then
this field is ignored and the SQUAWK code that is programmed into NVM is using the civil
settings message (defined in ICD02373) is used. The Squawk Code follows the following
logic:
