NavCom LAND-PAK Rev.N - Manual (Page 85)

Technical Reference Manual Rev. N
Blk = All; Blu = IOP w/Internal Radio ; Red = IOP & LBM ; Grn = Engine only
83
0x75 - Transmit Envelope - Variable Length
This message is used to address a message to a specific NCT integrated receiver on an
available network (i.e. turn off RTK base function on a distant unit).
Record
Usage Command - Yes
Response - No Input: sets the remote internal radio operation;
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 75 (hex) U08 1
Length 0x0xxx U16 2
W1 Reserved U08 1
W2 HOP count - Number of HOPS U08 1
W3
To Address: Ghost ID of Unit
(Radio ID)
Unit uses internal block if
Address matches (W3)
Otherwise, Slave Rebroadcasts
message and Increments
HOP count, if HOP equals
0 (Master will rebroadcast with
HOP count at 0 or 1, all
messages not addressed to it).
All Units will match to broadcast
ID (0xc350, decimal
50000)
U16 2
W4
From Address: Ghost ID of the Unit
to respond to
U16 2
W5
Internal Block
B1: Command ID
B2: Msg. Len.
B3: W1
Bn: Wm end of internal
message
Checksum
U08
U16
…
…
U08
1
2
…
…
1
CKSM Checksum U08 1
ETX 03 (hex) U08 1