SPECIFICATION CONTROL DRAWING REVISIONS REV. 1 DATE 5/12/05 DESCRIPTION ECO NO. Preliminary Release --------- 8.5" GWX 68 Installation Manual 3-Hole Punch 11" DER REVIEW REQUIRED NOTES: 1. DESCRIPTION: Installation Documentation - GWX 68 Installation Manual 2. PAGE SIZE: Letter: Width = 8.5 inches, Height = 11 inches Tabloid: Width = 11.0 inches, Height = 17.0 inches 5 single-sided tabloid sheets. 3. PAGINATION: 30 double-sided letter sheets. 4. MATERIAL: 24 pound bond.
Preliminary GWX 68 Installation Manual Garmin P/N 190-00286-01 May, 2005 Preliminary Revision 1
© Copyright 2005 Garmin Ltd. or its subsidiaries All Rights Reserved Except as expressly provided herein, no part of this manual may be reproduced, copied, transmitted, disseminated, downloaded or stored in any storage medium, for any purpose without the express prior written consent of Garmin.
This manual reflects the operation of software version TBD. Some differences in operation may be observed when comparing the information in this manual to earlier or later software versions.
SAFE DISTANCE DETERMINATION The following information establishes a minimum safe distance from the antenna for personnel near an operating airborne weather radar. The minimum safe distance is based upon the FCC’s exposure limit at 9.3 to 9.5 GHz for general population/uncontrolled environments which is 1 mW/cm2. See AC 20-68B for more information on safe distance determination. Antenna Size 10” 12” Safe Distance 9.16 ft 10.
GENERAL PRECAUTIONS Airborne weather radar should be operated on the ground only by qualified personnel. Installed airborne radar should not be operated while the aircraft is in a hanger or other enclosure unless the radar transmitter is not operating, or the energy is directed toward an absorption shield which dissipates the radio frequency energy. Otherwise, radiation within the enclosure can be reflected throughout the area.
TABLE OF CONTENTS PARAGRAPH PAGE 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 GENERAL DESCRIPTION..............................................................................................................1-1 Introduction........................................................................................................................................1-1 Equipment Description ......................................................................................................................
LIST OF ILLUSTRATIONS FIGURE 3-1 3-2 3-3 3-4 3-5 A-1 B-1 B-2 B-3 B-4 PAGE Shield Block Install onto Backshell Connector Assembly ................................................................3-3 Shielded Cable Preparation................................................................................................................3-4 Daisy Chain Method for Shield Termination.....................................................................................3-7 Parallel Shield Termination .............
GWX 68 HARDWARE MOD LEVEL HISTORY The following table identifies hardware modification (Mod) Levels for the GWX 68. Mod Levels are listed with the associated service bulletin number, service bulletin date, and the purpose of the modification. The table is current at the time of publication of this manual (see date on front cover) and is subject to change without notice.
1 1.1 GENERAL DESCRIPTION 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.
1.4.2 Physical Characteristics Characteristics Specifications Unit Size See Figure A-1. GWX 68 Outline Drawing 10" – 9.0 lbs (4.08 kg) 12" – 9.1 lbs (4.13 kg) Unit weight 1.4.3 General Specifications The table below contains general environmental specifications. For detailed specifications, see the Environmental Qualification Form (005-00171-00). Characteristics Specifications Operating Temperature Range -55°C to +70°C. For more details see Environmental Qualification Form.
1.4.5 Power Requirements Characteristics Input Voltage Range Input Current 1.5 Specifications 14/28 Vdc See the Environmental Qualification Form for details on surge ratings and minimum/maximum operating voltages. 2A @ 28V, maximum License Requirements The Telecommunications Act of 1996, effective February 8, 1996, provides the FCC discretion to eliminate radio station license requirements for aircraft and ships. The GWX 68 installation must comply with current transmitter licensing requirements.
1.6 Certification The conditions and tests required for TSO approval of this article are minimum performance standards. It is the responsibility of those installing this article either on or within a specific type or class of aircraft to determine that the aircraft installation conditions are within the TSO standards. TSO articles must have separate approval for installation in an aircraft. The article may be installed only if performed under 14 CFR part 43 or the applicable airworthiness requirements.
1.8 Limited Warranty This Garmin product is warranted to be free from defects in materials or workmanship for two years from the date of purchase. Within this period, Garmin will at its sole option, repair or replace any components that fail in normal use. Such repairs or replacement will be made at no charge to the customer for parts or labor, provided that the customer shall be responsible for any transportation cost.
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2 INSTALLATION OVERVIEW 2.1 Introduction This section provides hardware equipment information for installing the GWX 68, related hardware, and antennas. Installation of the GWX 68 should follow the aircraft TC or STC requirements. Cabling is fabricated by the installing agency to fit each particular aircraft. The final installation must meet the requirements of FAA AC 43.13-1B and AC 43.13-2A. 2.
2.4 Cabling & Wiring Use AWG #24 or larger wire for all connections unless otherwise specified by the aircraft manufacturer or Garmin. The standard pin contacts supplied in the connector kit are compatible with up to AWG #22 wire. In cases where some installations have more than one unit sharing a common circuit breaker, sizing and wire gauge is based on aircraft circuit breaker layout, length of wiring, current draw of units, and internal unit protection characteristics.
3 INSTALLATION PROCEDURE 3.1 Unpacking Unit Carefully unpack the equipment and make a visual inspection of the unit for evidence of damage incurred during shipment. If the unit is damaged, notify the carrier and file a claim. To justify a claim, save the original shipping container and all packing materials. Do not return the unit to Garmin until the carrier has authorized the claim. Retain the original shipping containers for storage.
NOTES 1. Non-Garmin part numbers shown are not maintained by Garmin and consequently are subject to change without notice. 2. Extracting the #16, #18 and #20 contact requires that the expanded wire barrel be cut off from the contact. It may also be necessary to push the pin out from the face of the connector when using an extractor due to the absence of the wire. A new contact must be used when reassembling the connector. 3.
3.3.1 Shield Block Assembly Procedure The parts for the connector and backshell assembly, GWX68 installations, are listed in Table 3-3 and shown in Figure 3-1. Figure 3-1. Shield Block Install onto Backshell Connector Assembly Table 3-4.
1. Attach the Shield Block(s) (2) to the backshell (1) by inserting the flathead screws (3) through the holes on the Shield Block and threading into the tapped holes on the backshell (1). (See Figure 3-1). The appropriate number of Shield Block kits is included in the GWX 68 connector kit. Table 3-5. Shielded Cable Preparation Float Min Float Max Ideal Float Window Min Window Max Ideal Window 1.5” 2.5” 2.0” 3.0” 5.5” 4.5” Figure 3-2. Shielded Cable Preparation 2.
Preferred Method, Solder Sleeves: Slide a solder sleeve (5) onto the prepared cable assembly (4) and connect the Flat Braid (6) to the shield using a heat gun approved for use with solder sleeves. It may be easier to use a solder sleeve with a preinstalled Flat Braid versus having to cut a length of Flat Braid to be used. The chosen size of solder sleeve must accommodate both the number of conductors present in the cable and the Flat Braid (6) to be attached.
Secondary Method, Heat Shrink instead of Solder Sleeves: Solder a Flat Braid (6) to the shield exposed through the window of the prepared cable assembly (4). Ensure a solid electrical connection through the use of acceptable soldering practices. Use care to avoid applying excessive heat that burns through the insulation of the center conductors and shorts the shield to the signal wire. Slide a minimum 0.75” of Teflon heat shrinkable tubing (5) onto the prepared wire assembly and shrink using a heat gun.
8. Guidelines for terminating the newly cutoff Flat Braid(s) (item 6) with insulated ring terminals (9): • • • • • Each tapped hole on the Shield Block (2) may accommodate only two ring terminals (9). It is preferred that only two Flat Braids (6) be terminated per ring terminal. Two Flat Braids per ring terminal will necessitate the use of a Ring terminal, #8, insulated, 14-16 AWG (MS25036-153).
9. Repeat steps 2 through 8 as needed for the remaining shielded cables. 10. Terminate the ring terminals to the Shield Block (2) by placing items on the Pan Head Screw (10) in the following order: Split Washer (11), Flat Washer (12), first Ring Terminal, second Ring Terminal if needed, before finally inserting the screw into the tapped holes on the Shield Block. Do not violate the guidelines presented in Step 8 regarding ring terminals. 11.
3.3.3 Configuration Module Assembly Procedure (MX20 only) Table 3-7. Configuration Module Wire Color Reference Chart Color Function J400 Pin Black Ground 1 Red Vcc 17 Yellow Data 16 White Clock 31 1. Crimp pins (4) onto each wire of the four-conductor wire harness (3). Strip 1/8” of insulation from each wire prior to crimping. 2. Insert newly crimped pins and wires (3, 4) into the appropriate connector housing (5) location shown in the figure below. 3.
3.4 Unit Installation The GWX 68 is designed to be rigidly mounted in the nose section of the aircraft. If the nose section is not accessible, pod mounting is possible. The bulk head or antenna mounting plate must be very close to perpendicular to the aircraft center line. The selected location must have adequate clearance for the full antenna sweep and tilt range. See Appendix A for outline and installation drawings. The nose section does not need to be pressurized.
4 SYSTEM INTERCONNECTS 4.1 Pin Function List 4.1.
Connector P400, continued Pin 36 37 38 39 40 41 42 43 44 4.2 Pin Name ETHERNET OUT A ETHERNET OUT B ARINC 429 IN 1 A ARINC 429 IN 1 B RESERVED RESERVED RESERVED RESERVED RADAR REMOTE POWER OFF I/O Out Out In In ----In Power 4.2.1 Power Functions This section covers the power input requirements. 4.2.1.
4.3 Serial Data 4.3.1 Serial Data Electrical Characteristics 4.3.1.1 ARINC 429/453 Pin Name ARINC 453 OUT A ARINC 453 OUT B ARINC 429 IN 1 A ARINC 429 IN 1 B ARINC 429 IN 2 A ARINC 429 IN 2 B Connector P400 P400 P400 P400 P400 P400 Pin 4 5 38 39 22 23 I/O Out Out In In In In Connector P400 P400 P400 P400 Pin 34 35 36 37 I/O In In Out Out 4.3.1.
4.5.2 26 Volt AC Reference Pin Name 26 VAC GYRO REF LO 26 VAC GYRO REF HI Connector P400 P400 Pin 20 21 I/O In In Expected nominal input voltage is 400 Hz, 26VRMS.
APPENDIX A OUTLINE & INSTALLATION DRAWINGS 45° MAX. AZIMUTH ANGLE PRELIMINARY RIGHT ANGLE CONNECTOR 6.815±.064 173.09±1.63 4.600±.022 116.84±0.56 AZIMUTH AXIS 4X 211-64214-22 1/4-28 SOCKET HEAD CAP SCREWS BULKHEAD MOUNTING SURFACE 4.951±.029 125.75±0.74 TILT AXIS R6.548 166.32 MAX SPHERICAL RADIUS 12" ANTENNA 10.00 254.0 6.750 171.45 .25 6.4 3.375 85.73 4X .265 6.73 30° MAX. TILT ANGLE UP THRU 2.47 62.7 R5.530 140.46 MAX SPHERICAL RADIUS 10" ANTENNA .30 7.6 3.312 84.12 6.624 168.25 NOTES: 1.
APPENDIX B INTERCONNECT DRAWINGS Figure B-1.
APPENDIX B INTERCONNECT DRAWINGS Figure B-2.
APPENDIX B INTERCONNECT DRAWINGS Figure B-3.
APPENDIX B INTERCONNECT DRAWINGS Figure B-4.
