5-48. The shock absorbers (Figure 5-22) attached to the outside of the CLU's main housing help protect the equipment during field operations. One absorber is a face shield that protects the gunner's face during missile launch.
H
ANDGRIPS5-49. The handgrips (Figure 5-23) are attached to either side of the main housing. They provide a means for the gunner to hold the CLU and are equipped with gunner controls that allow the gunner to direct all Javelin operations.
Figure 5-23. Handgrips.
C
ONTROLS ANDI
NDICATORS5-50. Most of the controls are located on the handgrips, with the exception of the diopter adjust ring and power switch. The diopter adjust ring is located on the eyepiece, and the power switch is located on the CLU main housing.
Diopter Adjust Ring
5-51. The diopter adjust ring (Figure 5-24) is hand-rotated to adjust the focus of the CLU display images to the gunner's vision level. Any gunner with vision correctable to 20/20 can use the CLU and see an in-focus image without using glasses. When wearing a protective mask, the gunner must use his optical inserts if he wears glasses. This occurs because the gunner can no longer place his eye directly on the eyecup.
NOTE: The white mark located on the left side of the mounting plate for the eyepiece is the
Figure 5-24. Diopter adjust ring.
Power Switch
5-52. The power switch (Figure 5-25) is a rotary switch located on the left side of the CLU main housing, at the lower rear corner. This switch controls the Javelin's mode of operation; each position enables different Javelin capabilities. The power switch has four positions:
z OFF. z DAY. z NIGHT. z TEST.
OFF Position
5-53. When the power switch is in the OFF position, no battery power is applied to the Javelin. The day FOV can be used for surveillance and target detection, but the NVS cannot be used, the seeker cannot be activated, and the missile cannot be launched.
DAY Position
5-54. When the power switch is in the DAY position, power is applied to the CLU; the gunner has the day FOV, but no NVS. The gunner can also activate the seeker, lock the missile onto a target, and launch the missile.
NIGHT Position
5-55. When the power switch is placed in the NIGHT position, the gunner has full Javelin capability. Once the NVS is cooled down (approximately 2.5 to 3.5 minutes), the gunner can select WFOV, NFOV, and day FOV.
NOTES: 1. The CLU automatically enters a low-power mode (known as the SLEEP mode)
when the CLU is in the night mode, the NVS is cooled down, the CLU is not attached to a round, and the CLU is in day FOV for at least 5 minutes. SLEEP mode removes power from all nonessential functions to save battery power, but power is supplied to the DDC to keep the NVS operational. SLEEP mode can also be initiated by entering the CLU menu and selecting SLEEP.
2. The CLU is operational within 10 seconds of exiting the SLEEP mode. To exit the SLEEP mode, press the sight select switch (SGT SEL) or attach the CLU to a round.
TEST Position
5-56. When the power switch is in the TEST position (Figure 5-26), the CLU enters a routine BIT. The power switch is spring-loaded when in this position; when the gunner moves the power switch to the TEST position, it returns to the NIGHT position upon release.
Figure 5-26. Power switch in the TEST position.
OFF Position
5-57. Prior to turning the power switch to the OFF position, the gunner must leave the power switch at DAY for at least one second to give the flipper mirror time to move to the daysight position.
Left Handgrip Controls
5-58. The left handgrip is equipped with the following controls (Figure 5-27): filter switch, focus switch, sight select switch, and seeker trigger. These controls allow the gunner to perform the following actions:
z Select the E-ZOOM. z Adjust the NVS focus. z Change the FOV. z Activate the seeker.
z Lock onto a target/enable the fire trigger. z Access the CLU menu.
z Select CLU menu options.
Figure 5-27. Left handgrip controls.
Filter (FLTR) Switch
5-59. The left pushbutton switch, FLTR (Figure 5-28), allows the gunner to select the E-ZOOM, which doubles the WFOV and NFOV magnification. The FLTR switch is also used with the ATTK SEL switch to initiate the MENU function on the CLU. Once in the MENU, the FLTR switch is used to select an option.
Focus (FOCUS) Switch
5-60. The center switch, FOCUS (Figure 5-28), is a spring-loaded, self-centering thumb switch that moves up and down to adjust the focus of NVS images (WFOV and NFOV). It is not operational in the day or seeker FOV.
Sight Select (SGT SEL) Switch
5-61. The right pushbutton switch, SGT SEL (Figure 5-28), has two functions, depending on whether the Javelin is in NVS or seeker operation.
Night Vision Sight Operation
5-62. The NVS function is not available until after NVS cooldown. After cooldown, the SGT SEL switch cycles through day FOV, WFOV, and NFOV. The appropriate status indicator (DAY, WFOV, NFOV) illuminates when the SGT SEL switch is pressed.
Seeker Operation
5-63. The seeker operation function reverts from the seeker FOV to the previous CLU FOV.
Figure 5-28. Filter, Focus, and Sight Select switches.
Seeker Trigger
5-64. The seeker trigger (Figure 5-29) located at the index finger position on the left handgrip activates the seeker, locks the seeker onto the target, and enables the fire trigger.
NOTE: The seeker trigger is equipped with a trigger guard to prevent accidental seeker
activation.
Right Handgrip Controls
5-65. The right handgrip is equipped with the GATE ADJ/CTRS & BRT switch, the ATTK SEL switch, and the fire trigger (Figure 5-30). These controls allow the gunner to perform the following actions:
z Adjust NVS contrast and brightness (WFOV and NFOV). z Adjust the track gates (seeker FOV).
z Change the missile mode. z Change NVS image polarity. z Launch the missile.
z Access the CLU menu.
z Change the highlighted CLU menu option.
Figure 5-30. Right handgrip controls.
NOTE: Contrast and brightness adjustment works only with the NVS, not with the daysight
or the seeker.
Gate Adjustment/Contrast and Brightness (GATE ADJ/CTRS & BRT) Switch
5-66. The left self-centering switch, GATE ADJ/CTRS & BRT (Figure 5-30), moves up, down, left, and right to serve three functions (depending on whether the CLU display image is from the NVS or the seeker).
Night Vision Sight Images
5-67. When the CLU display shows an NVS image (WFOV or NFOV), the GATE ADJ/CTRS & BRT switch can be used to adjust image contrast and brightness.
Seeker Images
5-68. In seeker FOV, the GATE ADJ/CTRS & BRT switch is used to adjust the track gates.
Menu Controls
5-69. When the CLU menu is displayed, the GATE ADJ/CTRS & BRT switch moves the white text from one menu option to the next.
Attack Select (ATTK SEL) Switch
5-70. The right switch, ATTK SEL, has three functions (Figure 5-30).
Missile Mode
5-71. In the seeker FOV, the gunner can select the missile mode for target engagement.
Image Polarity
5-72. In any other FOV, the gunner can change the NVS image polarity from white hot to black hot.
Command Launch Unit Menu
5-73. When activated at the same time as the FLTR switch, the gunner can access the CLU menu.
Fire Trigger
5-74. The fire trigger (Figure 5-31) is located at the index finger position. Once the missile is locked onto the target, the gunner squeezes the fire trigger to launch the missile.
Figure 5-31. Fire trigger.
COMMAND LAUNCH UNIT STATUS INDICATORS
5-75. The CLU controls let the gunner tell the Javelin what to do; the CLU indicators let the Javelin tell the gunner how it has responded to his control inputs. The CLU indicators include the status indicators, reticles, track gates, and crosshairs. All are viewed by looking into the eyepiece.