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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.
Table 3-22.12. ZEROIZE PAGE VAB OPERATIONS
Function
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.
Aborts the ZEROIZE action and returns the CDU to the page presented prior to the
ZEROIZE action being initiated.
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 3-25.17.
The functions on the GPS STATUS page are of a readonly
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 3-25.17. GPS STATUS Page
3-64.20 Change 4
TM 1-1520-238-10
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
value can be 0 through 5.
Right-hand character field displays the legend P
CODE X, indicating the number of P CODE (Precise
Positioning Service - PPS) satellites the GPS receiver
is using in its navigation solution. Displayed value can
be 0 through 5.
Line 5. - Right-hand character field displays the legend
C CODE X, indicating the number of C CODE
(Standard Positioning Service - SPS) satellites the
GPS receiver is using in its navigation solution. Displayed
value can be 0 through 5.
Line 6. - Displays the System Annunciator Data.
Line 7. - Left-hand character field displays status
prompts indicating operational status of the GPS Precise
Positioning Service - PPS feature. Displayed
prompts and their meaning are:
KIU VER Keys in Unit Verified
KIU UNVER Keys in Unit Unverified
KIU INCOR Keys in Unit Incorrect
KEY PARITY ERR Key Parity Error
INSUFF KEYS Insufficient Keys
The right-hand character field displays the legend
DATAO.
Line 8: Blanked.
3.16.13 Program Menu (PGM MENU) Page. The PGM
MENU top level page is accessed by depressing the
PGM FAB on the CDU. The PGM MENU page allows
access to the maintenance-related functions of Boresight
EGI (BST EGI), FCC CONFIG, AWS Harmonization
(AWS HARM), FCC Memory READ (READ)
and the Auxiliary Alphanumeric Display (AND). The
PGM MENU top level page is shown in figure 3-25.18 and
discussed below. VAB functions are explained in Table
3-22.13
Figure 3-25.18. PGM MENU Page
Line 1. - Left-hand character field displays the legend
OBST EGI. The right-hand character field displays
the legend AWS IIABMO.
Line 2. - Displays the centered page title PGM MENU.
Line 3. - Blanked.
Line 4. - Blanked.
Line 5. - This line displays the centered legend â FCC
CONFIG â . The downward pointing arrows direct the
operator’s attention to the FCC software version data
displayed on line 6.
Line 6. - Displays the centered FCC software version.
Line 7. - Left-hand character field displays the legend
OREAD. The right-hand character field displays the
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