Honeywell KHF 1050, System Installation Manual

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KHF 1050 SYSTEM INSTALLATION MANUAL
Page 2013
Revison 2
23-10-09
Apr/2006
5.C. Interwiring and Cable Fabrication
5.C.(1) Fabrication and Routing
“Figure 2029 - KHF 1050 HF System Interconnect” provides a KHF 1050 HF
Communication System interconnect summary.
Cabling must be fabricated according to the interwiring diagrams. The length of
the wires to parallel pins should be approximately the same length, for best
current distribution.
Wires for optional functions are shown on the interwiring diagrams. The actual
use of these wires will depend upon the installation, customer requirements and
capability of the units installed.
When the cables are installed in the aircraft, they must be supported firmly
enough to prevent movement and should be carefully protected against
chafing. Additional protection should also be provided in all locations where the
cables may be subject to abuse.
In wire bundles, the cabling should not be tied tightly together as this tends to
increase the possibility of noise pickup and similar interference. When routing
cables through the airframe, the cables should cross high-level lines at a right
angle.
The installer must be knowledgeable of any system variation peculiar to the
installation such as strapping requirements described in Paragraph
“5.D.
Strapping Options” . Furthermore, the installer should use ARINC
Characteristic 735 as a guide and reference throughout the fabrication and
installation of the cabling in the aircraft.
5.C.(2) Interface Capability and Requirements
All RF coaxes must be double shielded.
Special care should be taken in the routing of the microphone input line. This
line is susceptible to noise. It should not be routed in the same harness
containing high current lines.