Becker BD406 - Figure 33: Target Status Protocol - Frame Description

Installation
Becker Avionics
Targets Status Protocol - IF3 Interface
76 BD406/PBD406 DV16401.03 Issue 04 May 2021
Frame Description
Frame Header
Value Block
0x00 0xXX … 0xZZ
Frame
Figure 33: Target Status Protocol - Frame Description
Field
Length in bytes
Content
Frame Header
1
Bit 7: Set always to 0.
Bits 6...0: Frame ID - identifies frame.
Frame header is mandatory.
Frame header is the first byte of the frame.
Value Block
up to 69
Specified for related frame ID.
It identifies reported data, details see "Table 4: Target Status
Protocol - Frame Content Description" page 79.
Table 3: Target Status Protocol - Frame Description
Frame Content Description
The table "Table 4: Target Status Protocol - Frame Content Description" page 79 contains detailed
description of the protocol data.
Multi byte data are organized related to the big-endian order i.e. MSB first.
The term "string" shows sequence of bytes where its values are in [0x20 … 0x7E] range
(ASCII subset).
Table details:
• Name - name of the parameter / accessible status of the protocol.
• Frame ID – unique identifier of the frame, decimal (hex in parenthesis).
• Value block length – length of frame contents in bytes.
Description
Name: Broadcasted Beacon Info; Frame ID: 0 (0x00); Value Block Length: 69 bytes
Value Block:
Byte 0: Index of the current Beacon. Range [0…#TN-1]. Unit: none (data type: 8-bit unsigned
integer). 0xFF value denotes Invalid data.
Byte 1: Total count of Beacons in the Beacons DB. Range [0…#TN]. Unit: none (data type:
unsigned integer). If this byte is equal to 0x00 it means that all other bytes in this Frame are
Invalid.
Byte 2: Status byte:
Bits 7…6: not used (always set to 0)
Bit 5: (Self-Test Message) (0 - no self-test message, 1 – self-test message)
Bit 4: Manual Offset included in True Beacon Position (0 – not not included, 1 - included, bit 2
and bit 3 cannot be set to 1 together)
Bit 3: Auto Offset included in True Beacon Position (0 – not included, 1 – included, bit 2 and bit
3 cannot be set to 1 together)
Bit 2: PDF-2 field valid (0 – field invalid, 1 – field valid)
Bit 1: Distance unit of the Distance To The Target (0 – km, 1 – NM)
Bit 0: True Beacons Longitude and True Beacons Latitude fields valid (0 – fields invalid, 1
– fields valid)