Lynx NGT-9000
Installation Manual
b.
VHF Communications
Set VHF communications radios to multiple frequencies and monitor effects of unit while
transmitting and receiving. At a minimum, the frequencies listed below should be tested, in
addition to locally available frequencies:
Check the GPS signal status of the each satellite being received does not drop while
transmitting each frequency for a period of 35 seconds. Degradation of individual received
satellite signals below a point where navigation is no longer possible is not acceptable and will
require that additional isolation measures be taken.
For installations on rotorcraft, ensure that the rotor blades do not interfere with the received GPS
signals. This problem has been experienced in some rotorcraft and varies with the rotation rate.
Test the following frequencies for 25 kHz COM channel spacing:
121.150 MHz
121.200 MHz 121.250 MHz
131.225 MHz
131.275 MHz 131.325 MHz
121.175 MHz 121.225 MHz 131.200 MHz
131.250 MHz
131.300 MHz 131.350 MHz
In addition test the following frequencies for VHF radios with 8.33 kHz channel spacing:
121.185 MHz 121.190 MHz 130.285 MHz
131.290 MHz
2.
Navigation
a.
VOR / ILS
Verify the operation of each VHF Nav receiver in both VOR and ILS modes (including
glideslope) while monitoring the effects of the unit.
b.
DME
Verify the operation of each DME while monitoring the effects of the unit. The same
frequencies used for VOR and ILS testing may be used for this test.
c.
Marker Beacon
Verify the operation of the Marker Beacon Receiver while monitoring the effects of the unit.
d.
ADF
Verify the operation of the ADF receiver while monitoring the effects of the unit. Frequencies
from each band should be tested when possible. Public broadcast stations are acceptable for
conducting test.
3.
Flight Director / Autopilot
Operate the flight director/autopilot system and verify it responds to commands from the flight
guidance panel while monitoring the effects of the unit.
4.
Compass System
Verify each compass system is presenting correct information while monitoring the effects of the
unit.
5.
Attitude System
Verify each attitude system is presenting correct information while monitoring the effects of the unit.
Page 3-32
Installation Checkout
0040-17001-01
January 15, 2015
Revision A
