NavCom LAND-PAK Rev.N - Manual (Page 55)

Technical Reference Manual Rev. N
Blk = All; Blu = IOP w/Internal Radio ; Red = IOP & LBM ; Grn = Engine only
53
0x47 - SV Tracking Control – 12+(1*n)
SV Tracking information is entered using the SV Tracking Control message assigning elevations
masks, SV channels, and reservation using words 2 through 5.
Record
Usage Command - Yes
Response - Yes
Input: sets the conditions which satellites will be tracked and used for PVT;
Output: reports the current settings of the receiver tracking configuration
Use with 0x49
Ref Message Field Description
Data
Type
Units Range Scale
Byte
Count
STX 02 (hex) U08 1
PRA1 99 (hex) U08 1
PRA2 66 (hex) U08 1
ID 47 (hex) U08 1
Length 0x00xx U16 2
W1
Command Action
B1=0: Do not store in NVRAM
1: Store in NVRAM
B2=0: Do not use ACK/NAK
1: Use ACK/NAK
B3=0: Use Commanded Values
1: Use Default values
U08 1
W2 Elevation mask
4
- 0 default U08 degrees 0 - 90 1
W3 Reserved U08 1
W4
SV/Channel assignment mode
B0=0: Automatic assignment mode
1: Manual assignment mode
Automatic SV assignment controls:
B1: Reserved
B2=0: Do not use SV reservation flags
1: Use SV reservation flags
0x00: No minimum
U08 1
W5
SV reservation flags
Bn=0: Only track if a channel is available
Bn=1: Always track as long as possible
Manual SV-to-channel assignment
U32 bits 0-31 PRN-1 4
Repetitive Block
WnX Assign PRN to chan X
5
(00=not assigned) U08[] decimal 1-32 1*n
CKSM Checksum U08 1
ETX 03 (hex) U08 1
See notes on next page…