Garmin GTX 32 Installation Manual

Garmin GTX 32 Installation Manual Manual pdf 18 page image

Page 2-4 GTX 32 Installation ManualRevision F 190-00303-602.4 Cabling and WiringUse MIL-W-22759/16 or other approved wire, AWG #24 or larger wire for all interface connections. Thestandard pin contacts supplied in the connector kit are compatible with up to AWG #22 wire. In caseswhere some installations have more than one unit sharing a common circuit breaker, sizing and wiregauge is based on aircraft circuit breaker layout, length of wiring, current draw of units, and internal unitprotection characteristics. Do not attempt to combine more than one unit on the same circuit breakerunless it is specified on aircraft manufacturer approved drawings.In some cases, a larger gauge wire such as AWG #18 or #16 may be needed for power connections. Ifusing #16 or #18 barrel contacts, ensure that no two contacts are mounted directly adjacent to each other.This minimizes the risk of contacts touching and shorting to adjacent pins or to ground.Ensure that routing of the wiring does not come in contact with sources of heat, RF or EMI interference.Check that there is ample space for the cabling and mating connectors. Avoid sharp bends in cabling androuting near aircraft control cables.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.The maximum coaxial cable attenuation at 1090 MHz must not exceed 1.5 dB, including connectors.The following table is for reference only, and lists some suitable cable types, along with the maximumlength based on an assumed loss figure of 0.2 dB per connector. Any 50 Ω, double shielded coaxial cableassembly that meets airworthiness requirements and the 1.5 dB maximum loss figure (includingconnectors) may be used.Max. Length(feet – [m])Insertion loss(dB/100ft)ECS Type MIL-C-17 Type RG Type6' 1.3" [1.86m] 18.0 M17/128-RG400 RG-4007' 7.3" [2.32m] 14.45 3C142B9' 2.0" [2.79m] 12.00 M17/112-RG304 RG-30412' 6.0" [3.81m] 8.80 311601 M17/127-RG393 RG-39315' 5.4" [4.71m] 7.12 31150119' 9.4" [6.03m] 5.56 31120130' 3.6" [9.24m] 3.63 310801SupplierInformationVendor: ElectronicCable Specialists5300 W. FranklinDriveFranklin, WI 53132Tel: 800-327-9473414-421-5300Fax: 414-421-5301www.ecsdirect.comSee current issueof QualifiedProducts ListQPL-17.RG types areobsolete andare shown forreference only;replaced byM17 typenumbers.