SDM-300L3 Satellite Modem
Revision 1
BUC FSK Communications
MN/SDM300L3.IOM
15–3
15.2.2
Response Message Structure (BUC to IDU)
Byte
Name
Description
Value
1
Address
Address of BUC shifted left by 4
0x10 to 0xf0
2
Level Byte 1
MSbyte of TX output power
3
Level Byte 2
LSbyte of TX output power
4 Temperature Temperature in
°
C
5
Status Byte 1
Bit 0: Temperature out-of-range
Bit 1: PLL out-of-lock
Bit 2: Checksum error
Bit 3: TX Status
Bits 4 thru 7: Power Class
1: OOR, 0: Normal
1: OOL, 0: Normal
1: error in command
message, 0: Normal
1: TX ON, 0: TX Off
0x1 to 0xf
6
Status Byte 2
Bits 0 – 3: Not used
Bits 4 –7: Software version
0xAA
0x0 to 0xf
7
Checksum
Algebraic sum of bytes 1 - 6
Data Field Definitions
TX Power Level
Unsigned integer in 1/100 dBm
Carrier Frequency
Unsigned integer in MHz.
Termperature
Signed character in
°
C
15.3 Power
Class
Includes all power levels for C- and Ku-Bands.
Value
Power
0x1 2
watt
0x2 4
watt
0x3 5
watt
0x4 8
watt
0x5 10
watt
0x6 16
watt
0x7 20
watt
0x8 25
watt
0x9 40
watt
0xa 60
watt
