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RC4000 Antenna Controller
3.4 Azimuth/Elevation/Polarization Jog Command
This command jogs the antenna in azimuth, elevation, or polarization. The command contains 11 bytes.
Here is the format of the command:
byte 0
byte 1
byte 2
byte 3
byte 4
bytes 5-8
byte 9
byte 10
If this command can be executed, the reply to this command will be the same as the reply to the status
poll query command except the command code will be '33h'. A NAK reply will be sent to the host if the
direction specifies C, W, U, D, O, or L and the limit input associated with the axis and direction specified
by the command is asserted (only for versions of the controller which support individual limits). Note that
the controller can only support a remote jog about a single axis. For example, if a remote jog is in
progress about the azimuth axis and a remote elevation jog command is received (that can be executed –
i.e. no limits or alarms are active), the azimuth jog will terminate regardless of the duration specified for
the remote azimuth jog. A NAK reply will also be sent to the host if polarization movement is specified
and the Polarization Type CONFIG mode item is set to 0 (Circular Polarization). If the direction byte
contains 'X' all antenna movement will stop. If TRACK mode is active and the direction byte specifies 'X',
'C', 'W', 'D', or 'U' REMOTE mode will receive control and all tracking will cease. If TRACK mode is
active and a peaking or search operation is in progress the NAK reply will be returned to the host.
Appendix REM
STX
A
RC4000 address
33h
the command code
direction
This field can specify 'E', 'W', 'D', 'U', O, L, or 'X' where ...
E refers to azimuth Counter clockwise,
W refers to azimuth clockWise,
D refers to elevation Down,
U refers to elevation Up,
O refers to polarization cOunter clockwise,
L refers to polarization cLockwise, and
X means stop all movement.
speed
This field specifies the jog speed, either 'F' (Fast) or 'S' (Slow).
Note that this field must contain a valid value even if the direction
field specifies 'X' (Stop).
duration
This field specifies the duration of the 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 50 milliseconds, so any move will
be for a time interval equal to a multiple of approx. 50
milliseconds. Note that this command must contain a valid value
even if the direction field specifies 'X' (Stop).
ETX
checksum
the checksum
REM-17
Remote Control Option
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