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11-APR-06 Rev E OMACS3000
23 of 51
System Screens
up or down. All four directions must be jogged to their limit and all four check boxes must be displayed
before the operator can go on to the next step in the Initialization Wizard.
Figure 15: Verify Hardware Limits Screen
Verify Pol Hardware Limits
The antenna observer used for the AZ and EL Hardware Limits verification is necessary for the Pol hardware
limits verification as well. The observer is needed to request emergency stop from the operator if any wires
or wire harnesses become entangled as the antenna moves or the antenna moves beyond its physical limits.
Single Speed Pol Drive Hardware Limits
If a single speed (1:1 ratio) pol drive is installed, the operator moves to the counter-clockwise limit as
directed by the screen. (See
Figure 16
) The operator will jog until that axis reaches the physical limit. The
operator will know that the limit is reached when that direction checkbox is checked. The operator should
also notice that the resolver counts (as displayed by the position status line) discontinue counting down.
When the pol counter-clockwise limit is reached and the operator verifies that the hardware limit is ok by
pressing the completed button, the system software will adjust the pol offset so that the counter-clockwise
limit reads 2.0 degrees.
WARNING
The observer must be in position to stop the hardware
from moving into obstructions, twisting wires, or moving
beyond physical limits.