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RC4600 ACU Board Set
2.1.1.2.2.3.2 LOCATE Automatic Movement
Before automatic movement to the calculated position is initiated, the RC4600 requests that a polarization
position be selected. This is so the polarization mechanism will be in the correct position to be able to
detect received signal strength.
Note: this selection is not requested if the feed type is defined as "circular". In this case the RC4600 will
immediately begin the locate automatic movement after ENTER is pressed from the main LOCATE
screen.
H - H O R I Z O N T A L :
V -
8 -
< H / V / 8 > S E L E C T R X P O L A R I Z A T I O N < M O D E > M E N U
The RC4600 calculates the vertical polarization position as a function of mount latitude/longitude and
satellite longitude. The horizontal position is calculated as 90 degrees from the vertical in the direction
(Clockwise/Counter-Clockwise) that will maintain the horizontal position within the polarization axis' range
of movement. The "neutral" position represents the polarization angle halfway between the calculated
vertical and horizontal values. The neutral position may be appropriate if the Locate Source configuration
item is set to 5 (RF).
Immediately following the polarization selection, the RC4600 will begin moving to the calculated position
to continue the locate process. The progress of the movement is displayed on the following screen.
A Z :
E L :
M O V I N G T O S T A R T O F S C A N
The current angular values for AZ/EL/PL are displayed along with the target position for each axis in
parenthesis. The label for the current axis being moved will flash. Movement may be halted at any time
by pressing the <Stop> key. Halting movement will return the controller to the MANUAL mode.
If below the down limit in elevation, the first automatic movement will be in the platform local elevation
axis to ensure that the mount is brought out of the elevation stow and down regions. If above the down
limit, or after moving above the down limit the RC4600 will then make an automated move in local
horizontal angles to the first point of the locate routine.
If the Locate Source configuration item is set to 0 (NONE), the LOCATE mode will finish by moving to the
nominal target azimuth position. A final movement to the target elevation will also be performed to
account for change in mount elevation due to vehicle tilt. Following this movement, the controller will
return to MANUAL mode where the user should peak up and confirm the identity of the satellite.
If configured, an azimuth scanning movement (2.1.1.2.2.3.3) will be performed if the selected satellite
does not have an inclined orbit. If the satellite does have an inclined orbit, a spiral search movement
(2.1.1.2.2.3.6) will be performed. For both scanning movements to be successful, the user is required to
have the receiving equipment (prior to the movement) configured for the RC4600 to be able to detect
signal strength.
Chapter 1
- 7 . 1
V E R T I C A L :
8 2 . 9
N E U T R A L :
3 7 . 9
- 3 . 3 4 5 (
5 . 4 )
3 0 . 6 7 7 (
4 5 . 0 )
B C N :
S A T : G A L A X Y 2 8
< S T O P > H A L T
35
Introduction
L O C A T E
L O C A T E
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