Garmin GTX 327 Installation Manual

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GTX 327 Installation Manual Page 9190-00187-02 Rev J2.3.4 Antenna Cable InstallationWhen routing antenna cables, observe the following precautions:• All cable routing should be kept as short as possible and as direct as possible.• Avoid sharp bends.• Avoid routing cables near power sources (e.g., 400 Hz generators, trim motors, etc.) ornear power for fluorescent lighting.• Avoid routing cable near ADF antenna cable (allow at least a 12-inch separation).The following table lists examples of the recommended antenna cable vendors and the type of cable to beused for specific lengths of cable. Any cable meeting specifications is acceptable for the installation. Themaximum coaxial cable attenuation at 1090 MHz must not exceed 1.5 dB.Table 2-1. Recommended Antenna Cable TypeMax. Length (feet) ECS Type MIL-C-17 Type RG Type8.8 M17/128 RG40010.0 3C142B12.5 M17/112 RG30417.0 311601 M17/127 RG39321.0 31150127.0 31120141.0 310801Supplier Information Vendor: ElectronicCable Specialists5300 W. Franklin DriveFranklin, WI 53132Tel: 800-327-9473414-421-5300Fax: 414-421-5301www.ecsdirect.comMIL-C-17 types: Seecurrent issue ofQualified Products ListQPL-17.RG types: See currentissue of QualifiedProducts List QPL-17.2.3.5 Antenna Cable ConnectorsOne of two rack connectors are provided (item 6 or 12 in the installation drawing, figure B2 on page 39).RF Adapter item 12 (Garmin P/N 330-00326-00) requires the cable to be terminated to an appropriatetype BNC plug (provided by installer), which is then attached to item 12. Any 50 ohm, double shieldedcable may be used, provided it introduces less than 1.5 dB attenuation at 1 GHz including the connector.Connector item 6 (Garmin P/N 330-00198-00) requires the cable to be terminated directly to it and canaccommodate only M17/128 (RG-400) cable. The completed cable including connectors must introduceno more than 1.5 dB attenuation at 1 GHz. Instructions for installing the item 6 are shown below (stepsA-G).