Northern Airborne Technology NPX136D - Manual (Page 14)

NPX136D Series Panel Mount P25 VHF Transceiver
SM68 Installation and Operation Manual
Section 2 Rev: 1.00 Issue 4 Page 2-5
ENG-FORM: 805-0118.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
d) Check the antenna feedline at the R/T with a through-line wattmeter and suitable frequency
elements to ensure correct antenna matching. Reflected power in excess of 25% represents a
serious problem, and should be investigated carefully, or serious RFI and system interference as
well as possible radio damage may result. A VSWR measurement over 3.0:1 represents a
significant loss in signal power to the antenna. Check that forward power is to specifications over
the frequency band of the radio.
Upon satisfactory completion of all performance checks, make all required log book entries, electrical
load, weight and balance amendments and other documentation as required by your local regulatory
agency before releasing the aircraft for service.
2.4.8 Post Installation EMI Test
The purpose of this test is to identify any interference that the radio may cause with existing aircraft
systems. The radio should be tested in accordance with the Installation Approval Test Procedure (see
section 2.6), and the test results documented on the record sheets.
2.5 Accessories Required But Not Supplied
Installation kit p/n NPX-IKC (crimp) is required to complete the installation. The kit consists of the following:
Quantity Description NAT Part #
1 D-min 25 Pin Female Crimp Installation Kit D25SV-IKC
1 Field Serviceable BNC Coax Connector 20-51-001
The NAT Part D25SV-IKC Crimp Installation Kit consists of:
Quantity Description NAT Part #
1 D-min 25 Socket housing 20-21-025
25 MS Crimp Socket 20-26-901
1 25 pin JVL Hood/Locklever 20-29-250
2.6 Installation Drawings
DOCUMENT
REV. DESCRIPTION TYPE
SERIAL NO.
NPX136D\403-0 1.10 Panel Mount Transceiver Interconnect (2 sheets)
All
NPX136D\405-0 1.00 Panel Mount Transceiver Connector Map All
NPX136D\634-0 1.00 Panel Mount Radio Installation Approval Test Procedure
All
NPX136D\905-0 1.01 Panel Mount Transceiver Faceplate
All
NPX136D\922-0 1.00 Panel Mount Transceiver Mechanical Installation All
Section 2 ends following the above documents