89000046-014 KSN 780/8XX/900 AeroNav AML STC Installation Manual for Helicopters
Rev 0 Page-3-5
© Honeywell International Inc. Do not copy without express permission of Honeywell.
3.3.2 GPS Antenna Bonding
The GPS Antenna should have ≤ 2.5 milliohm resistance to the helicopter fuselage.
3.3.3 GPS Antenna Cable
The GPS Antenna Cable must be RG-142B, RG-400, or an equivalent 50Ω double shielded coaxial
cable. The GPS antenna cable loss should not be greater than 6.5dB or less than 1.5 dB. Each
connector on the GPS coaxial cable will add an additional 0.2 dB loss to the cable.
The GPS antenna cable should not be routed with high power wires or transmitting antenna cables.
If dual GPS Systems are installed on the aircraft, the GPS coaxial cables should be routed in such a
manner to provide maximum separation between the two GPS coaxial cables.
3.3.4 GPS Coaxial Cable Connector
The connectors on the GPS coaxial cable should be assembled per the connector manufacturer’s
assembly instructions.
3.3.5 Approved GPS Antennas
The AeroNav XXX can be interfaced to all TSO-C190 antennas and the approved antennas listed in the
table above. If connected to an approved WAAS Antenna, the AeroNav XXX is approved for TSO-
C146d Gamma 3 operation.
The AeroNav XXX can be interfaced to non-WAAS antennas but the system will not be approved for
any type of WAAS operations. In this case, the Antenna Type selection as described in this section
CI-428-200 GPS WAAS Antenna Cobham (Comant)
CI-2580-200 VHF/GPS WAAS Antenna Cobham (Comant)
CI-2728-410 VHF/GPS/XM Antenna Cobham (Comant)
GA-35 GPS/WAAS Antenna Garmin
GA-36 GPS/WAAS Antenna Garmin
GA-37 GPS/WAAS Antenna Garmin
GA-56A GPS/WAAS Antenna Garmin
GA-56W GPS/WAAS Antenna Garmin
GA-57 WAAS/XM Antenna Garmin
A33 (AT575-9UW) GPS/WAAS Antenna Garmin /AeroAntenna
A34 GPS/WAAS Antenna Garmin /AeroAntenna
AV-801 GPS/WAAS Antenna RAMI
AT575-93AVW-TNCF-000-
RG-27-NM
GPS/WAAS Antenna AeroAntenna Technology
Table 34 Approved GPS Antennas for SBAS Operation
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