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RC4000 Antenna Controller
3.3 Auto Move Command
This command causes the controller to automatically position the antenna in azimuth, elevation, and
polarization. The command contains 16 bytes formatted as follows:
byte 0
byte 1
byte 2
byte 3
byte 4-13
byte 14
byte 15
The normal reply to this command will be the same as the reply to the status poll query except that the
command code field will be '32h'. Note that if the satellite name is not found or target positions for a move
to a target position are not specified properly a NAK reply will be sent to the host. If the command
specifies polarization movement but the Polarization Type is set to CIRCULAR (no polarization control
device present), and ACK will be received, but the command will be ignored.
The Auto Move command has several forms:
Form 1. If the sat_name/position field contains the name of a satellite saved via the controller's STORE
mode the controller will position the antenna at the azimuth and elevation positions associated with that
satellite. The satellite name should be in capital letters, left justified and padded on the right with blanks
in the sat_name/position field. Note that the satellite name specified in the command must exactly match
a satellite name stored in the controller's non-volatile memory. Form 1 automates the RC4000 RECALL
mode.
With this form of the command, the polarization field may contain either 'H', 'V', or ' ' (blank, 20 hex or 32
decimal). If an 'H' or 'V' is specified, in addition to positioning the antenna in azimuth and elevation, the
polarization control device will be commanded to go to the position associated with either the horizontal (if
'H' is specified) or vertical (if 'V' is specified) position specified for the satellite. If the field contains a blank
the polarization is not changed. For example, this command with 'H' in the polarization field and 'SBS 6
' in the sat_name/position field will specify an auto move to SBS 6 and the polarization will be adjusted to
horizontal for the SBS 6 satellite.
Form 2A. If the sat_name/position field contains a valid pair of azimuth and elevation sensor positions
(scaled by 10), the antenna will move to the position specified. The first 5 characters of the
sat_name/position field specify the azimuth position (azimuth sub-field) and the last five characters
specify the elevation position (elevation sub-field). Within each of the sub-fields the position must be right
justified and left padded with zeroes. For example, a sat_name/position field value of '-152500456'
specifies an azimuth position of -152.5 degrees and an elevation position of 45.6 degrees. For this form
of the auto move command, only the ' ' (blank) character is accepted in the polarization field. If the
simultaneous azimuth/elevation drive option is not enabled, the controller will move elevation first and
azimuth second.
Form 2B. If the antenna system is equipped with "count"-type sensors (pulse or resolvers), this form can
be used to move to a pair of pulse or resolver counts. For example, a sat_name/position field value of
'1105012152' specifies an azimuth pulse position of 11050 and an elevation pulse position of 12152. The
polarization field should contain a 'C'. Note that if no "count"-type sensor is available, a NAK reply will be
sent to the host.
Appendix REM
STX
A
32h
polarization
sat_name/position
ETX
checksum
REM-15
RC4000 address
the auto move command code
'H', 'V', ' ' (blank), 'C', 'A', 'a', 'E', 'P', 'p', '+', 'S'
satellite name or a target azimuth, elevation, or
polarization position
Remote Control Option
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