TM 1-1510-262-10
Table 4-1.
Annunciator Panel Controls and Indicators -- Continued
Index #
Control/Indicator
Function
6
PWR PNL DC (yellow)
Illuminates to indicate DC mission power has been removed
from the Primary Mission Equipment (PME)
7
Illuminates to indicate a hardware uplink or downlink
LINK SYNC (yellow)
out-of-sync condition
8
TWTA STNDBY (yellow)
Illuminates when the GATE TWTA (Traveling Wave Tube
Ampliier) high voltage is disabled by the Copilot s Data Link
HV ON switch. (Indicates that the TWTA/upconverter A2A8A5
is in standby mode)
9
WOW DEFEAT (yellow)
Illuminates to indicate Copilot WOW (Weight-on-Wheels)
override switch is selected.
10
Not Used
- - - - -(yellow)
11
Not Used
- - - - -(yellow)
12
Not Used
- - - - - (green)
13
Not Used
- - - - - (green)
14
EXT PWR ON (green)
Illuminates to indicate external AC power source is connected
and applied to aircraft
15
Illuminates to indicate the tail boom antenna is in the horizontal
AFT ANT STOW (green)
stowed position
16
Illuminates to indicate the Data Link is holding cipher key data
LINK KGHOLD (yellow)
when the aircraft s wheels are down
17
PWR PNL AC (yellow)
Illuminates to indicate a loss of 3-phase AC power from a
mission inverter, or when the 3 AC CONTROL BUSCROSS
TIE toggle switch when set to OFF.
Also illuminates to indicate a loss of 3-phase AC power from
both mission inverters if 3 AC CONTROL BUS CROSS TIE
toggle switch is set to ON.
18
LINK MAN CTL (yellow)
Illuminates to indicate the ANT STEERING rotary switch is
in either the MANUAL or GROUND position. Or if the ANT
SELECT toggle switch is in either the NOSE or TAIL position
19
PME CNTL ORIDE (yellow)
Illuminates to indicate the +28 VDC power source from the
MISSION CONTROL ORIDE switch is set to ORIDE
20
AFT DF ANT (yellow)
Illuminates when the tail boom antenna actuator has failed
-----
21
Not Used
-----
22
Not Used
23
ESA SW LD (yellow)
Illuminates when the mission software is not loaded into the
ESA processor (CFS)
24
PME GPS FOM (green)
Illuminates to indicate that the LN-100G INS is available for
precision operations
25
Illuminates to indicate that the microwave link waveguide is
WAVEGUIDE (green)
properly pressurized
26
Not Used
- - - - - (green)
27
Illuminates to indicate that the tail boom antenna is in the
AFT DF ANT (green)
operate position. (This also indicates the boom antenna is
vertical and the landing gear is retracted)
4-3
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