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WPTS LOAD COMPLETE
CODES LOAD COMPLETE
PPOS LOAD COMPLETE
UPLOAD ALL COMPLETE
FCC SAVE-OK
FCC SAVE FAIL
The LOAD FAIL and LOAD COMPLETE prompts
refer to initialization data that was loaded in the DTC
using the Aviation Mission Planning System (AMPS).
Line 7. - The left-hand character field displays the legend
OLOAD CODES. The right-hand character field
displays the legend DATAO.
Line 8. - Scratchpad
3-64.18 Change 3
17
TM 1-1520-238-10
Table 3-22.10. DTU PAGE VAB OPERATIONS
Control/Display Function
VAB 1 Initiates LOAD of Waypoints, Targets, Laser Codes, and Present Position from cartridge.
To preclude inadvertent load of PPOS, the LOAD ALL function will not load PPOS if the
aircraft is airborne.
VAB 2 Loads WPTS from cartridge.
VAB 3 Loads TGTS from cartridge.
VAB 4 Loads CODES from cartridge.
VAB 5 Loads PPOS from cartridge unless aircraft is airborne.
VAB 6 Reformats DTC for normal use if DTC INITO is displayed; otherwise blanked.
VAB 7 Saves critical data in the FCC volatile memory (BST DATA, PPOS, Altitude, Altitude
Corrections, MAGVAR, etc.) to non-volatile memory and saves the waypoints, targets,
laser codes and PPOS to the DTC "SAVE" file.
VAB 8 Returns to the DATA MENU top level page.
d. ZEROIZE Page. The ZEROIZE page is accessed by
depressing VAB 4 on the DATA MENU page. The
ZEROIZE page is displayed as shown in figure VAB 8 is
used to return to the DATA MENU top level page. If the
ZEROIZE page is displayed for 5 seconds without an
operator depression of VABs 1, 4, 7, or 8, the display
automatically reverts back to the DATA MENU top level
page.. VAB functions are explained in table 3-22.11.
Figure 3-26.16. ZEROIZE Page
Line 1. - Left-hand character field displays the legend
>CONFIRM ZEROIZE ALL.
Line 2. - Displays the centered page title ZEROIZE
Line 3. - Blanked
Line 4. - Blanked.
Line 5 - The right-hand character field displays the
legend ABORT ZEROIZE 0 .
Line 6. -.Blanked
Line 7. - Left-hand character field displays the legend
ODNS ONLY.
Line 8. - The right-hand character field displays the
legend DATAO.
Change 3 3-64.19
18
TM 1-1520-238-10
Table 3-22.11. ZEROIZE PAGE VAB OPERATIONS
Control/Display Function
VAB 1 Zeroizes the following avionics subsystems data: FCC Waypoint List, FCC Target List,
FCC Laser Codes, FCC PPOS, DNS Ram Memory, GPS Y CODE Keys, and the DTU
Cartridge. The CDU will then return to the page displayed before the zeroize action was
initiated.
VABs 2-3 Inactive.
VAB 4 Zeroizes the DNS SDCC RAM Memory only.
VABs 5-6 Inactive.
VAB 7 Aborts the ZEROIZE action and returns the CDU to the page presented prior to the
ZEROIZE action being initiated.
VAB 8 Returns to the DATA MENU Top Level page.
e Global Positioning System Status (GPS STATUS)
Page. The GPS STATUS page is accessed by
depressing VAB 5 on the DATA MENU page. The GPS
STATUS page is displayed as shown in figure 3-26.17.
The functions on the GPS STATUS page are of a read
only nature and are non-editable. VAB 8 is used to return
to the DATA MENU top level page. All other VAB
functions are inactive..
Figure 3-26.17. GPS STATUS Page Line 1. Left-hand
character field displays the legend FOM 1 (Figure Of
Merit) and an associated value (1) reflecting GPS
performance status. Performance is scaled from 1-9,
with 1 indicating best GPS solution (1 = FOM of less than
25 meter error). Any value other than 1 to 9 indicates
erroneous GPS performance.
Right-hand character field will display one of the legends
NAV, or INIT or TEST, indicating GPS Receiver
operational mode.
Line 2. Displays the centered page title GPS STATUS.
Line 3. Left-hand character field displays the legend EHE
XXXXM, the GPS navigation solution Estimated PPOS
Horizontal Error, in meters. EHE value is displayed in
units of 0000 to 9999 meters. When 9999 is displayed,
the actual GPS Horizontal Error may significantly exceed
that value. The lower the number, the better the GPS
Horizontal position performance.
Right-hand character field displays the legend EVE
XXXXM the GPS navigation solution Estimated PPOS
Vertical Error, in meters. EVE value is displayed in units
of 0000 to 9999 meters. When 9999 is displayed, the
actual GPS Vertical Error may significantly exceed that
value. The lower the number, the better the GPS Vertical
position performance.
Line 4. Left-hand character field displays the legend SV
X, indicating the number of satellite vehicles the GPS
receiver is using in its navigation solution. Displayed
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