Northern Airborne Technology NT4xx - Manual (Page 15)

SM04 Rev 4.00 UHF Transceiver Manual
Nov 27, 2003 Page 2-5
ENG-FORM: 805-0106.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
2.3.5
Antenna Selection Guide
This guide shows some industry standard antennas which can be used with NAT NT-
Series Transceivers, and gives a range of mechanical choices where possible.
2.3.5.1
UHF Antennas 403-871 MHz Range
Transceiver
NAT Comant D&M Type
NT-403 AT-403 CI-271 Stub
CI-275 Blade
CI-275-5
Blade (N)
NT-450/A/B/C CI-106 Stub
CI-200 Whip
CI-275 Blade
CI-275-5
C57-1 Blade (N)
NT806 AT-806 CI-306 Stub
2.3.6 Post-Installation
Checks
2.3.6.1 Wiring Checks
a)
With the Tac/Com control head disconnected from all of its mating connectors,
make the following measurements on P100 SYSTEM connector (25 pin female),
if used:
i) Check pin 1 and 2 for +28 VDC (or 14 VDC) relative to ground.
ii) Check pins 13, 14 and 15 for continuity to ground (below 0.5 ohms).
iii) Check pin 3 (28 VDC), pin 4 (14 VDC) or pin 5 (5 VDC) for proper lamp
dimmer voltage. Check 16, 17 or 18 for continuity to ground as above
(lamp return).
DO NOT ATTACH THE TAC/COM CONTROL HEAD until these conditions are met.
b)
With the Tac/Com Transceiver disconnected from all of its mating connectors,
make the following measurements on the airframe (female cable end) connector:
i) Check pin 1 and 2 for +28 VDC relative to ground.
ii) Check pins 14 and 15 for continuity to ground (below 0.1 ohms).