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data is used by the MCPU in conjunction with data be accomplished only by the CPG (fig. 4-1 through 4-4
supplied from the LRF/D and EGI to compute battlefield and 4-6 through 4-11).
coordinates of targets and waypoints.
(2) The MMS provides a boresight mode of 4-3. OFFSET UPDATE.
operation which aligns the LOS of the TVS and TIS to
the LRF/D and TVS which share the same optics. The Offset updating is similar to flyover updating except the
boresight procedure may be performed any time after MMS is used to specify the locations of the waypoint.
power is applied to the MMS; however, it might be
necessary to wait up to 15 minutes before TIS video is 4-4. TARGET LOCATE.
clear enough for an adequate boresight of the TIS.
(3) The video tracker system (VTS) processes WARNING
the TVS or TIS image data to acquire and maintain
track. If the VTS loses lock-on, the MMS enters a coast Target locate function shall not be
mode automatically for up to 10 seconds while performed while in the direct waypoint
attempting to reacquire the target. Should reacquisition mode on aircraft configured with version
not occur, the MMS directs the tracker to change to 7.0 software (CDS2). Failure to comply
manual track. can result in calling fire upon yourself.
(4) Laser firing is controlled by the MMS. Laser The target locate function uses MMS LOS angles, laser
firing is inhibited when the laser is directed into the tail range, and helicopter present position to compute the
rotor, the weight on gear switch senses the helicopter location coordinates of targets. Target location
has landed, the CPG MFD fails, TIS and FR FRZ are accuracy is dependent upon NAV system and MMS
selected, or TIS is selected and TIS INTEG is switched pointing accuracy.
on. Inhibited indications are: (1) IMPEND LSR INHBT
and (2) LSR INHBT. In the event laser system
operating temperatures exceed 160 °F, the system will 4 - 5 . MANUAL DRIFT COMPENSATION
automatically shut down unless the operator uses the (MDC).
TEMP ORID line address key to prevent shutdown. The
TEMP ORID key is displayed on any MMS page, but The MDC function eliminates unwanted drift in the
MMS LOS. From time to time it will be necessary to do
only when the condition exists. If shutdown is allowed this task as the gyros change their performance
to occur, the operator can still use the TEMP ORID key characteristics. This drift will be noticed most easily
to restart laser operation. This is an emergency when the MMS is switched from a fixed LOS (FWD or
procedure and will result in severe damage to the laser PREPT) to manual track.
system. Continuous operation of the laser for extended
periods will not cause an overheat condition. Overheat
condition will occur only in the event of a system 4-6. MMS MULTIFUNCTION DISPLAY LINE
component failure. ADDRESS KEYS.
(5) Condition and status of MMS equipment is The pilot and CPG have line address keys that control
determined by built-in test (BIT) and fault detection and affect MMS operation (fig. 4-10 through 4-17).
location system (FDLS) functions that detect and report
equipment malfunctions. Condition and operational NOTE
status are displayed on the MFDs. In the event of MMS
failure, an advisory message, MMS FAIL, will be For standardization in procedures, “press”
displayed on pilot and CPG MFD. Advisory messages is used to denote a pressing and releasing
associated with the MMS are displayed only on the action unless “press and hold” is specified.
4-2
TM 1-1520-248-10
CONTROL/INDICATOR FUNCTION
1. LASER switches:
CODE LIST switch Displays laser codes entered into memory or allows entry of new
codes or changing of existing codes.
FIRST/LAST switch:
FIRST Activates LRF/D for range-findings of targets in open terrain or in
front of cluttered terrain.
LAST Activates LRF/D for range-finding of targets in or behind cluttered
terrain.
ARM/STBY/OFF switch
ARM Arms LRF/D system providing that all interlocks are complete.
STBY Applies power to the LRF/D system.
OFF Removes power from the LRF/D system.
Figure 4-1. MMS Control Panel (Sheet 1 of 3)
4-3
TM 1-1520-248-10
(Cont)
CONTROL/INDICATOR FUNCTION
2. VIDEO switches:
SYM INTEN MFD Increases (+) and decreases (-) illumination intensity of symbols
presented on MFD other than MMS. Symbols will be white in the (+)
range and black in the (-) range.
SYM INTEN MMS Increases (+) and decreases (-) illumination intensity of MMS
symbols presented on MFD. Symbols will be white in the (+) range
and black in the (-) range.
GAIN Increases (+) and decreases (-) TIS video data contrast.
LEVEL Increases (+) and decreases (-) TVS/TIS video data brightness.
　
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