Research Concepts RC1000 - Manual (Page 42)

valid value even if the direction
field specifies 'X' (Stop).
bytes 5-8 : duration This field specifies the duration
of the azimuth jog command in
milliseconds. The valid range of
values for this field is '0000' to
'9999'. As a practical matter, the
resolution of the timer used to
time the move is approximately 150
milliseconds, so any move will be
for a time interval equal to a
multiple of approx. 150
milliseconds. Note that this
command must contain a valid value
even if the direction field
specifies 'X' (Stop).
byte 9 : ETX
byte 10 : 'chksum' the checksum
The reply to this command will be the same as the reply to the QUERY
command except that the command code will be '33h'.
POLARIZATION COMMAND
The following command specifies a polarization jog. The command
contains 6 bytes. Byte 3 can contain one of the following values...
'C'... jog the polarization clockwise.
'W'... jog the polarization counter clockwise. Note that
there is not a duration or a speed associated with
these commands. The duration is fixed and the speed
increases as the polarization continues it's
movement without being interrupted. An interruption
occurs if another command does not arrive before the
previous polarization command terminates.
'H'... move the polarotor to the preset horizontal position
of the satellite closest to the antenna's present
azimuth position.
'V'... move the polarotor to the preset vertical position
of the satellite closest to the antenna's present
azimuth position.
'F'... Disable the AutoPol function.
'N'... Enable the AutoPol function.
The format of the command code is as follows ...
byte 0 : STX
byte 1 : 'AA' where AA is the RC1000A address
byte 2 : '34h' the command code
byte 3 : 'X' the polarization command parameter
byte 4 : ETX
byte 5 : 'chksum' the checksum