SKY899
Installation Manual
Page F-12 - Appendix F
009-11900-001
July 18, 2013
Revision F
j. Set SELF-TEST switch to center position (off). Set the POWER switch to the OFF position.
NOTE
Care should be taken to ensure that the Patch Antenna is connected to
TT391 connector J1 and NOT J2. IF THE PATCH ANTENNA IS
CONNECTED TO J2 THE TT391 WILL NOT FUNCTION
CORRECTLY
k. Connect the Flightline Tester coax cable to J3 on the Patch Antenna and to connector J1 in the
chassis. (J2 should remain capped by the dust cover).
.
Figure F-4: Typical Patch Antenna Tripod Mount
11.
From each test point (see step 8):
a. Position the TT391 Patch Antenna facing the SKY899 aircraft under test.
b. Set the TT391 POWER switch to the ON position.
c. Verify that the display shows, in the direction (± 30 degrees) of the TT391, 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).
NOTES
1.
If the display reflects a gross error in target bearing, check the directional
antenna cables at TRC connectors J9 (sum port) and J11 (difference
port). They may be reversed. A further indication of this condition would
be a target that moved in a counter-clockwise direction when the TT391
is moved in a clockwise direction.
2.
Multiple targets or a faulty bearing may result from multipath distortion
(see step 8).
3.
During these tests, the SKY899 may detect and display other active
targets.
4.
To obtain a better line of sight, it may be necessary to elevate the patch
antenna.
The document reference is online, please check the correspondence between the online documentation and the printed version.