GWX 68 Installation Manual
Page 1-1
190-00286-01
Preliminary Revision 1
1 GENERAL
DESCRIPTION
1.1 Introduction
This manual presents mechanical and electrical installation requirements for installing the GWX 68
Airborne Weather Radar.
NOTE
The ability of a weather radar system to accurately display weather returns is highly
dependent upon the quality of the radome and its Transmission Efficiency. The specified
performance of the GWX 68 Airborne Weather Radar can be achieved when installed
behind a DO-213 Class A Radome within the RF window defined as +-45 degrees from
dead ahead in azimuth and +-15 degrees from dead ahead in elevation. Refer to RTCA
document DO-213 Class A for minimum operational performance standards for nose
mounted radomes.
1.2 Equipment Description
The GWX 68 Airborne Weather Radar is a microprocessor-based Line Replaceable Unit (LRU) that
outputs weather radar data to an external MFD. The GWX 68 communicates with other LRUs via
ARINC 429/453 and/or Ethernet high speed data bus (HSDB).
CAUTION
The operation of ground-based cellular telephones or other ground-based cellular devices
aboard aircraft while airborne is prohibited by FCC rules. Due to the potential for
interference with onboard systems, the operation of ground-based cellular communication
devices while onboard an aircraft that is on the ground is subject to FAA regulations 14
CFR 91.21.
FCC regulation 47 CFR 22.925 prohibits airborne operation of ground-based cellular
telephones installed in or carried aboard aircraft. Ground-based cellular telephones must
not be operated aboard any aircraft while the aircraft is off the ground. When any aircraft
leaves the ground, all ground-based cellular telephones on board that aircraft must be
turned off.
Ground-based cellular telephones that are on, even in a monitoring state, can disrupt GPS
performance.
1.3 Interface
Summary
The GWX 68 is designed as an open architecture system that uses typical ARINC 429, ARINC 453, and
Ethernet communications interfaces.
1.4 Technical
Specifications
1.4.1 Environmental Qualification Form
It is the responsibility of the installing agency to obtain the latest revision of the GWX 68 Environmental
Qualification Form. This form is available directly from Garmin under the following part number:
GWX 68 Environmental Qualification Form, Garmin part number 005-00171-00
To obtain a copy of this form, see the dealer/OEM portion of the Garmin web site (www.garmin.com).
