SKY899
Installation Manual
Page F-2 - Appendix F
009-11900-001
July 18, 2013
Revision F
Table F-1: Lamp/Annunciator & Switch Function
LAMP/ANNUNICATOR
FUNCTION
ABOVE (ABV) - Look up +9000 ft.
ABV lamp only is on when in the above vertical mode.
(External lamps see figure F-1.)
BELOW (BLW) - Look down -9000 ft.
BLW lamp only is on when in the below vertical mode.
(External lamps see figure F-1.)
NORMAL (NRM) - Looks above & below ±2700 ft.
ABV & BLW lamps are off when in the normal vertical mode.
(External lamps see figure F-1.)
UNRESTRICTED (UNR) - Looks above & below
±9900 ft.
ABV & BLW lamps are on when in the unrestricted vertical mode.
(External lamps see figure F-1.)
OPERATIONAL MODE (OPR) - optional
OPR lamp (not shown) is on when the system is operating (sending out
interrogations). Lamp is not lit when in standby or failed mode.
SWITCH
FUNCTION
ON/OFF POWER SWITCH - ON/OFF Input
Turns the system on and off.
OPERATE/STANDBY - Softkey 4 Input
Changes operational mode to either standby or operate.
RANGE - Softkey 3 Input
Changes display range.
TEST/ALTITUDE - Softkey 2 Input
Test - Runs self-test when in standby or failed mode.
Altitude - Changes vertical display modes when in operate mode.
(ABV = above, BLW = below, NRM = normal and UNR =
unrestricted).
Figure F-1: External Lamps
F.3 CHECKOUT PROCEDURE
The TT391 Flightline Tester simulates both a ground based secondary surveillance radar (SSR) and an
airborne transponder. With the SKY899 set to GROUND TEST (i.e., the barometric altimeter is simulated
to 50,000 ft, heading simulated to 0 degrees, and the radar altimeter simulated to 2,500 ft) the TT391 will
simulate two targets; a Traffic Advisory (i.e., a solid circle) at ¼ nm and Other Traffic (i.e., open
diamond) at 4.5 nm. Both targets will be displayed in level flight at own aircraft altitude (i.e., "00"
displayed above the traffic symbol).
If the indications given in the following procedure, except for the Flightline Tester, are not obtained, refer
to the troubleshooting procedures in Chapter 4. If indications given for the Flightline Tester are not
obtained, refer to the maintenance section of the TT391 Instruction Manual.
1.
Connect the RS-232 terminal device to J7 TEST port on the TRC899. Turn ON and setup the terminal
device. (See Appendix E for terminal device commands, setup, and operating instructions.)
2.
Apply power to the aircraft.
a.
Do not turn on the SKY899.
b.
Set transponder to STBY mode.
c.
Turn off DME.
d.
Verify all avionics equipment interfaced to the SKY899 (e.g., GPS, ADC, AHRS, synchro
compass, encoding altimeter, etc.) is turned on and signal condition is valid.
The document reference is online, please check the correspondence between the online documentation and the printed version.