b.
The second phase commences whenever the pointing control outputs return to zero. In this phase the TFU is caged to the last commanded position. It remains caged to this position until a new pointing control command is re-ceived or a different mode is selected that changes the line of sight.
4.6.4.5 Autoscan Mode. When the ASCN label is hooked, the CAGE sub-menu appears (Figure 4-8). When the desired CAGE value label is highlighted and hooked, the SCAN sub-menu appears. The scan pattern is selected by moving the highlight bar to the desired label and tog-gling the HOOK switch. When the desired scan label is hooked, the AUTOLOCK sub-menu appears. The autolock feature is then enabled or disabled. If autolock is disabled the RATE sub-menu appears. The rate is selected by hook-ing the desired label. The rate and scan pattern are repro-grammable in the con.guration menu. At anytime during this process the ASCN function can be activated by tog-gling the LOCK switch. The previous sub-menu can be returned to by hooking on the EXIT label at the bottom of any sub-menu. The system performs ASCN until the point-ing control is depressed or another mode is selected.
4.6.4.6 Cage Mode. In CAGE mode the TFU is com-manded to a particular pointing angle with respect to the aircraft center line. The default cage position is 0° azimuth, and 0° elevation and this is the position the TFU will cage to when the system is powered on. The default cage posi-tion and one other position are stored in nonvolatile memory and can be reprogrammed in the con.guration menu (Figure 4-8). The secondary default cage position is preprogrammed at 180° azimuth, and 0° elevation. Up to six additional CAGE positions are programmable by se-lecting the current gimbal as the cage position. The system reverts from CAGE to HH mode if a rate command is issued by depressing the pointing control.
a. When CAGE is hooked in the main menu, the CAGE sub-menu appears with control labels provided to add, se-lect, or delete cage values. The ADD function allows the pilot to add the current TFU position as an additional cage position. Up to eight cage positions can be stored (includ-ing the two default cage positions). CAGE positions are deleted with the DELETE command. A speci.c cage po-sition is selected with the SELECT command.
To add a cage position.
(1) Position the TFU to the desired position.
Change 4 4-22.1
(2)
Activate the menus and hook the CAGE label. The CAGE menu will appear on the right side of the screen.
(3)
Move the highlight bar to the ADD label and activate HOOK. The new cage position will be added in the .rst available slot on the list.
(4)
To exit the CAGE menu move the highlight bar to the EXIT label and activate HOOK.
To select a cage position.
(1)
Hook the SELECT label in the CAGE menu.
(2)
Move the highlight bar to the desired CAGE position and HOOK to select the position and remain in the menus or LOCK to select the position, place the system in the CAGE mode.
(3)
Exit the menus.
To delete one or more cage positions.
(1) Hook the DELETE label in the CAGE menu. The highlight bar should appear over position 3 in the list. Positions 1 and 2 are permanently stored in nonvolatile memory and can only be changed in the con.guration menu. Move the highlight bar to the desired cage position to be deleted and activate LOCK to delete the posi-tion. Repeat this procedure until all desired po-sitions are deleted.
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