Kannad 406 AF-COMPACT Installation Manual page 17

INITIAL INSTALLATION MANUAL
KANNAD 406 AF-COMPACT / KANNAD 406 AF COMPACT ER
Note: For internal installation in the aircraft, the fitter must check that
EIRP attenuation due to installation is not higher than 1.4 dB. In the case
of certified installation approved by the national authorities, a
requirement for validation of the installation must be done by the fitter.
Locate a position on the fuselage according to Section (2) RTCA DO-204
Requirements for ELT location, page 12:
A double plate may be necessary for the antenna to meet rigidity specifications
in Section (2) RTCA DO-204 Requirements for ELT location, page 12.
A 9 Kilogram force (20 pound force) applied in all direction should not cause an
appreciable distorsion in the aircraft skin.
Each of the approved antennas requires a ground plane. On fabric-covered
aircraft or aircraft with other types on nonmetallic skins, a ground plane must
be added. This can be accomplished by providing a number of metal foil strips
in a radial position from the antenna base and secured under the fabric or wood
skin of the aircraft. The length of each foil radial should be at least equal to the
antenna length and width at least 1 inch due to the diameter of the antenna. The
ground plane must be connected to the shield of the antenna connector.
Figure 11: Antenna ground plane for non metallic aircraft
According to the antenna to be installed, use the appropriate outline drawings
and drilling masks to determine the hole patern and drill size refer to the
relevant antennae outline dimensions page 35, page 36, page 37, page 38.
Fabricate a 50 Ohms coaxial cable long enough to reach between the ELT
installation location and the antenna location.
IMPORTANT: The length of the coaxial cable should not exceed 2.7
meters (9 ft) for a standard RG58 or equivalent coaxial cable. If the cable
length exceeds 2.7 meters, a low loss cable of attenuation less than 1
dB@400 MHz must be used (See Important notice, Outside antennas,
page 5).
Fit both ends of coaxial cable with a waterproof Male BNC connector (not
supplied), reference RADIALL R141007 or equivalent.
Connect one Male BNC connector to the antenna Female BNC socket.
PAGE: 13
SEP 16/2009