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RC4000 Antenna Controller
3.22 Write Navigation Data Command
This command downloads antenna position data into the RC4000.
byte 0
byte 1
byte 2
bytes 3-7
bytes 8-13
bytes 14-18
byte 19
byte 20
byte 21
7 6 5 4
0 1 0 A $ 0 0 0 0
bytes 22-30
byte 31
byte 32
The reply to this command will be the standard ACK or NAK reply.
NOTE: Any valid lat/lon/heading data will trigger an ACK reply. Upon reception of valid data, the
RC4000 will overwrite any existing position data and invalidate (DELETE) any STOREd satellites.
Appendix REM
STX
A
RC4000 address
46h
Write Navigation Data command code
Latitude
sddmm (+/-degrees/minutes) format
minus = South, positive (North) implied, pad with zeros
01234 = 12 degrees 34 minutes N
-1234 = 12 degrees 34 minutes S
00123 = 1 degree 23 minutes
Longitude
sdddmm (+/-degrees/minutes) format
minus = West, positive (East) implied, pad with zeros
001234 = 12 degrees 34 minutes E
-01234 = 12 degrees 34 minutes W
000123 = 1 degree 23 minutes E
True Heading
123.4 format (000.0 to 359.9)
True Heading of mount azimuth 0.0
Update Lat/Lon
'A' – automatically decide if GPS is needed
'U' – force update using GPS
'M' – use manually data from fields above
Update Heading
'A' – automatically decide if compass is needed
'U' – force update using compass
'M' – use manually data from fields above
Update Options
3 2 1 0
where 'A' is ...
0 – Move antenna to update navigation data immediately
1 – Do not move antenna
reserved
spare for future expansion (fill with blanks)
ETX
Checksum
REM-38
Remote Control Option
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