Справочник Пользователя для Honeywell International Inc. KSN770
Draft
Page 2-46
6 Dec 2012
34-70-06
SYSTEM INSTALLATION MANUAL
066-01204 / 066-01213
© Honeywell International Inc. Do not copy without express permission of Honeywell.
2.4
Antenna Installation
The antenna(s) must be well removed from other antenna projections, the engine(s), and propeller(s). It
must also be well removed from landing gear doors, access doors, or other openings which will break the
GND plane for the antenna(s). On metal skinned aircraft, the antenna(s) must be bonded to the surface
of the aircraft in a fore to aft location that provides the flattest GND plane. On composite aircraft, the
antenna(s) must be located at the center of a conductive GND plane, contoured to the shape of the
aircraft, having dimensions of at least 24.0 by 24.0 inches (610 by 610 mm). The antenna penetration
must be designed such that the structural integrity of the fuselage is not compromised. The antenna(s)
need to be within 5 degrees of the centerline.
must also be well removed from landing gear doors, access doors, or other openings which will break the
GND plane for the antenna(s). On metal skinned aircraft, the antenna(s) must be bonded to the surface
of the aircraft in a fore to aft location that provides the flattest GND plane. On composite aircraft, the
antenna(s) must be located at the center of a conductive GND plane, contoured to the shape of the
aircraft, having dimensions of at least 24.0 by 24.0 inches (610 by 610 mm). The antenna penetration
must be designed such that the structural integrity of the fuselage is not compromised. The antenna(s)
need to be within 5 degrees of the centerline.
Where practical, plan the antenna location(s) to keep cable lengths as short as possible and avoid sharp
bends in the cable to minimize the VSWR. Avoid running other cables or wires near the antenna cable(s).
bends in the cable to minimize the VSWR. Avoid running other cables or wires near the antenna cable(s).
On pressurized aircraft, the antenna(s) must be sealed using an approved sealant, such as RTV No. 3145
(Honeywell PN 016-01082-0000) or equivalent, around the connector and mounting hardware.
(Honeywell PN 016-01082-0000) or equivalent, around the connector and mounting hardware.
The antenna edge and mounting hardware recesses must be sealed from the outside for moisture
protection using RTV or equivalent.
protection using RTV or equivalent.
Mount the antenna(s) in as clean as environment as possible, away from exhaust gases and oils. The
antenna(s) must be kept clean. If left dirty (oil covered), the antenna performance may be affected.
antenna(s) must be kept clean. If left dirty (oil covered), the antenna performance may be affected.
Antennas must be installed in accordance with their own installation manuals.
2.4.1
GPS/WAAS Antenna Location Considerations
The KA 96 GPS active antenna, PN 071-01620-0001 or equivalent is the designated antenna for the
KSN 7xx.
KSN 7xx.
The antenna must be mounted on top of the fuselage near the cockpit. Avoid mounting the antenna near
any projections, the propeller, or the T-tail of the aircraft, where shadows could occur. It is recommended
that there be a separation of at least 36.0 inches (914 mm) between the GPS antenna and any VHF
COM antenna on the aircraft.
any projections, the propeller, or the T-tail of the aircraft, where shadows could occur. It is recommended
that there be a separation of at least 36.0 inches (914 mm) between the GPS antenna and any VHF
COM antenna on the aircraft.
The antenna baseplate must be level within ±5 degrees in both axes when the aircraft is level (level is
defined as the aircraft attitude required when weighing the aircraft for weight and balance) for optimum
performance. If the antenna is tilted more than 5 degrees or is mounted close to other objects that
shadow it, loss of some of the satellites will occur and system performance may be degraded. Antenna
cable and connector information, including vendor information is listed below.
defined as the aircraft attitude required when weighing the aircraft for weight and balance) for optimum
performance. If the antenna is tilted more than 5 degrees or is mounted close to other objects that
shadow it, loss of some of the satellites will occur and system performance may be degraded. Antenna
cable and connector information, including vendor information is listed below.
Refer to Figure 2-7 for the cable/connector assembly instructions for the 0 to 40 feet (0 to 12.2 meters)
category using RG 400/U or RG 142B/U.
category using RG 400/U or RG 142B/U.
Refer to Table 16 GPS Antenna Cable Information (for both TNC and BMA) for the 0 to 80 feet (0 to 24.4
meters) and 0 to 100 feet (0 to 30.5 meters) categories.
meters) and 0 to 100 feet (0 to 30.5 meters) categories.
NOTE: The Nominal signal gain for the KA 96 is 27 to 31 dB, the noise figure is 1.9 dB at 77°F (25°C),
2.5 dB maximum. With 0.050 ice on the radome, gain will not decrease by more than 2.0 dB
when viewing a satellite from 30 degrees above the horizon to zenith (as compared to a no ice
condition).
when viewing a satellite from 30 degrees above the horizon to zenith (as compared to a no ice
condition).
Draft as of 10/15/2012