RESEARCH CONCEPTS RC4000 Protocol page 25

RC4000 Antenna Controller
3.11 Write Two Line Element Data Command
This command downloads NORAD Two Line Element (TLE) ephemeris data into the RC4000. The index
must be the same as the associated sat data index.
byte 0
byte 1
byte 2
byte 3
byte 4
bytes 5-73
bytes 74-142
byte 143
byte 144
The reply to this command will be the standard ACK or NAK reply.
3.12 Read Two Line Element Data Command
This command uploads a stored set of Two Line Element (TLE) data.
byte 0
byte 1
byte 2
byte 3
byte 4
byte 5
byte 6
The reply to this command is as follows:
byte 0
byte 1
byte 2
byte 3
byte 4
NOTE: Bytes 3 & 4 will contain 7Fh when no valid data is stored for the requested index.
bytes 5-73
bytes 74-142
byte 143
byte 144
Appendix REM
STX
A RC4000 address
3Bh Write TLE Data command code
Index Tens Tens digit of TLE data index (0 if index < 10)
Index Ones Ones digit of TLE data index
TLE Line 1 69 characters (including checksum) of TLE Line 1
TLE Line 2 69 characters (including checksum) of TLE Line 2
ETX
Checksum
STX
A RC4000 address
3Ch Read TLE Data command code
Index Tens Tens digit of TLE data index (0 if index < 10)
Index Ones Ones digit of TLE data index
ETX
Checksum
ACK or NAK
address
3Ch
Index Tens Tens digit of TLE data index (0 if index < 10)
Index Ones Ones digit of TLE data index
TLE Line 1 69 characters (including checksum) of TLE Line 1
TLE Line 2 69 characters (including checksum) of TLE Line 2
ETX
Checksum
REM-25
Remote Control Option