Northern Airborne Technology NTA01-001 - Manual (Page 12)

NTA01-001 Motorola Series Radio Adapter Manual SM71 Rev. 4.10
2.3.2 Cautions
All audio installations can be severely degraded by incorrect wiring and shielding, and
may result in much higher cross-talk, hum, and ground-loop interference. This should
be considered when audio wiring to and from the radio system installation is
performed.
In communication intensive applications, poor cable routing and shielding may drastically
compromise over-all system performance. Use caution in the routing of wire bundles.
2.3.3
Cabling and Wiring
All unshielded wire shall be selected in accordance with AC43.13-1B Change 1,
Paragraphs 11-76 through 11-78. Wire types should be to MIL-W-22759 as specified in
AC43.13-1B Change 1, Paragraphs 11-85, 11-86, and listed in Table 11-11. For
shielded wire applications, use Tefzel MIL-C-27500 shielded wire with solder sleeves
(for shield terminations) to make the most compact and easily terminated interconnect.
Follow the wiring diagrams in Section 2.6 as required.
Allow 3 inches from the end of the wire to the shield termination to allow the hood to be
easily installed. Note that the hood is a ‘clamshell’ hood, and is installed after the wiring
is complete.
All wiring should be at least 22 AWG, except where otherwise specified. Ensure that all
ground connections are clean and well secured.
2.3.4 Installation of Radio into NTA01-001
Refer to Mechanical Installation drawing NTA01\001\952-0.
Remove the cover from the NTA01-001. The necessary cables and screws for
connecting and fitting the radio are inside the unit in anti-static bags.
Attached to the inside of the unit closest to the external connectors is the RF coaxial
cable connector, the power supply connector, and a 15-pin ribbon cable (J102), and at
the other end of the unit is a 25-pin ribbon cable. These should be attached to the
appropriate connectors on the radio.
Note: If an XTL-series radio is to be installed, the 15-pin ribbon cable (J102) is not
used, and must be removed to allow proper installation of the radio.
Inside one of the bags there are four panhead screws that should be used to attach the radio
inside the NTA01-001 through the cover, and also sufficient flathead screws to fasten the
cover into place.
Note: In some cases it may be necessary to use a 90º adaptor for the coaxial cable.
Page 2-2 Feb 6, 2006
ENG-FORM: 805-0106.DOT
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