MXS System Description and Installation Manual
UM06945
© Sagetech Avionics 2022 Proprietary Confidential
Page 21 of 56
4.3
Connecting the RF Antennas
Figure 4-2 Connectors to Top and Bottom Antenna
In the diversity configuration, top and bottom-located antennas connect to the MXS using the left and
right-side female SMA connectors. Assuming the orientation shown in Figure 4-2, the top antenna
connects to the left connector (labeled ‘T’) and the bottom antenna (labeled ‘B’) connects to the right
connector. Whenever power is applied to the MXS, a 50-ohm load must be provided to both of the SMA
connections. Ensure that the antenna(s) selected provide a 50-ohm termination for the MXS.
If only one antenna is used, that antenna must be connected to the bottom SMA connector on the MXS.
In this case, the following should be done:
•
The unused top antenna connector must be replaced with a 50-ohm termination rated for 0.25W
minimum (CW). (Refer to Table 4-3 for a suitable supplier and vender part number for the terminator.)
•
Antenna Diversity must be disabled using the host/MXS Installation Message (Type 0x01) (see
ICD02373).
Table 4-3 List of Common Mounting Parts and Vendors
Description
Vendor
Vendor PN
CONN TERMINATOR PLUG SMA 50OHM
Amphenol
132360
The antenna(s) used by MXS should be mounted on the outside of the aircraft according to the antenna
manufacturer’s installation instructions, with additional requirements and guidance provided below and
in Table 4-4.
