OPERATION MANUAL
NAV-402AP-3
1-1-1
Page 1
Sep 1/04
SECTION 1 - DESCRIPTION
1. GENERAL DESCRIPTION AND CAPABILITIES
1.1 DESCRIPTION
The NAV-402AP-3 is a Bench and Ramp Test
Set designed to meet the electronic
functional test requirements of Category I
and Category II ILS Systems, Communication
(COMM), Navigation (NAV) and Marker (MKR)
Systems.
The NAV-402AP-3 contains features to allow
testing of sophisticated autopilot systems.
These features include: automatic LOC DDM,
automatic sweep, two fixed VOR frequencies;
and two fixed, paired LOC and G/S
frequencies.
1.2 FUNCTIONAL CAPABILITIES
The NAV-402AP-3 has the following features
and capabilities:
O Signal Generator with a variable
attenuator which can be connected to the
equipment under test by a radiated signal
from a self-contained antenna or by a
coaxial cable. The signal generator can
be operated under either fixed frequency
control or in variable frequency mode in
each band.
O The generator can be modulated
internally by a 1020 Hz Ident Tone,
Marker, VHF Omnidirectional Range
(VOR), Localizer (LOC) or Glide Slope
(G/S) Tones.
O A six-digit counter which indicates the RF
of the signal generator on any band, the
frequency of a COM Transmitter under
test, any external signal input from 1 MHz
to at least 300 MHz, or the VOR Bearing
selected by the Bearing Select Switches.
O A built-in RF power meter measures COM
Transmitter power, from 0-10W or
0-100W, either peak or average power by
selecting a switch position located on the
Front Panel. A COM Transmitter
demodulation output permits viewing or
listening to COM modulation.
O A built-in modulation meter measures
Signal Generator Percent of Modulation
on any frequency band from 0-30% or
0-100%. Front Panel controls permit
quick setting of modulation percentages.
90° bearing check monitor allows quick
verification of basic VOR bearing from the
VOR demod signal. NICAD battery and
built-in charging system permit completely
portable operation for up to 2 hours
continuous duty. Any time the Test Set is
plugged to an ac line, the battery is being
charged. In battery operation, an
automatic timer turns the Test Set off
after 6 to 10 minutes. The Test Set can
be recycled by pressing the PWR/BAT
Switch to the BAT position.
