System Description

System Description and Installation Manual for MXS ICD10004-01
© Sagetech Corporation 2018 Confidential Proprietary Export-Controlled Page 30 of 160
Net Mask
Byte Offset
Byte Name Field Description
18
NM0
NM0 NM1 NM2 NM3 Net Mask
19
NM1 0xFF 0xFF 0xFF 0x00 255.255.255.0
20
NM2 Net Mask is a 32-bit mask used to divide an IP address into subnets and specify the network's
available hosts. In a netmask, two bits are always automatically assigned.
In the example above, 255.255.225.0, "0" is the assigned network address. In 255.255.255.255, "255"
is the assigned broadcast address. The 0 and 255 are always assigned and cannot be used.
21
NM3
Port Number
Byte Offset
Byte Name Field Description
22
PRT0 16-bit UDP port number used to communicate with the Transponder. The first byte is the most
significant byte.
23
PRT1
GPS Integrity9
Byte Offset
Byte Name Field Description
24
GI0
Source Integrity Level (SIL)
The GPS SIL should be set by a qualified expert. The field is used to declare the probability of the
horizontal position exceeding the radius of containment defined by the NIC without alerting. As a
guideline, Low integrity should be set for VFR only GPS or an uncertified installation.
System Design Assurance (SDA)
The GPS SDA should be set by a qualified expert. The field is used to declare the probability of a
fault causing false or misleading horizontal position information.
GIO (MSN)
0x0
0x1
0x2
0x3
0x4-0xF
GIO (LSN)
GPS Integrity – SIL (per flight hour)
Unknown; > 1x10-3 - Default
Low; ≤ 1x10-3
Medium; ≤ 1x10-5
High ≤ 1x10-7
Reserved
GPS Integrity – SDA (per flight hour)
9
The supported NexNav Mini GPS receivers are the CCA Part No 11000 and LRU Part No 21000.