Research Concepts RC2000A - Manual (Page 78)

78 RC2000A Dual Axis Antenna Controller Appendix E Communications Protocol
'S' (Slow). Note that this
field must contain a 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
status poll query 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 its 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.
The format of the command is as follows;
byte 0 : STX
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