Aero-Flex NAV-402AP-3 User Manual download pdf (Page 29)

OPERATION MANUAL

NAV-402AP-3

1-2-2

Page 6

Sep 1/04

ITEM DESCRIPTION

17. AVG/PEAK LOC XMTR ON Switch

Selects power meter function displayed

on MONITOR Meter when MONITOR

METER FUNCTION Switch is set to 10W

or 100W:

O PEAK sets the MONITOR Meter to

display peak power amplitude of a

COM Transmitter with modulation

applied. PEAK also provides

Localizer Transmitter output

simultaneously with the Glide Slope

signal when the FREQUENCY MODE

Switch is set to G/S FIXED (for

checking Autopilots or Course

Computers).

O AVG sets the MONITOR Meter for

displaying the average RF power of a

COM Transmitter and disregards

power changes due to proper

modulation.

18. 90/150 Hz VAR PHASE (φ) Switch

Varies the phase (φ) of the 150 Hz tone

relative to the 90 Hz tone. Normally, the

90 and 150 Hz tones, used in Glide

Slope and Localizer simulations, are

locked in phase together. Adjusting the

VOR BRG SELECT Switches while

pressing the 90/150 Hz VAR PHASE (φ)

Switch, changes phase relationship. If

the VOR BRG SELECT Switches are set

to 000.0, pressing the 90/150 Hz VAR

PHASE (φ) Switch produces no change in

phase. Each 1° step selected on the

VOR BRG SELECT Switches shifts the

150 Hz tone 5° relative to the 90 Hz

tone. The 90 Hz tone always remains

constant in phase relative to the 000.0

set on the VOR BRG SELECT Switches.

Setting the VOR BRG SELECT Switches

to 024.0 (24° VOR bearing) with the

90/150 Hz VAR PHASE (φ) Switch

pressed puts the 90 and 150 Hz tones in

original phase relationship. Setting the

VOR BRG SELECT Switches to 012.0

(12° VOR bearing) with the 90/150 Hz

VAR PHASE (φ) Switch pressed, places

the amplitude summation of the 90 and

150 Hz tones at maximum magnitude.

ITEM DESCRIPTION

19. G/S CENTER Adjust

Varies the amplitude of the 90 Hz tone

and controls exact course centering for

Glide Slope modulation.

20. G/S VAR DDM Control

Continuously varies G/S pointer

deflection from counterclockwise (ccw)

0.8 DDM (down) through 0 DDM to

clockwise (cw) 0.8 DDM (up). Setting the

G/S DDM Control to p activates the G/S

VAR DDM Control.

21. TONE SELECT Switch

Selects modulation input to the internal

Signal Generator or input to the internal

digital Counter:

O CTR IN connects the MOD IN/EXT

FREQ CTR IN Connector input to the

Counter, active with COUNTER

MODE Switch set to HZ, KHZ, KHZ or

MHZ.

O MOD IN applies the MOD IN/EXT

FREQ CTR IN Connector modulation

to the Signal Generator.

O 1020 applies 1020 Hz modulation to

the frequency band (except G/S) set

by FREQUENCY MODE Switch.

O 400 applies 400 Hz modulation to the

frequency band (except G/S) set by

FREQUENCY MODE Switch.

O 1300 applies 1300 Hz modulation to

the frequency band (except G/S) set

by FREQUENCY MODE Switch.

O 3000 applies 3000 Hz modulation to

the frequency band (except G/S) set

by FREQUENCY MODE Switch.

22. MOD IN/EXT FREQ CTR IN Connector

Provides an input for external modulation

to the internal Signal Generator or a 1 to

300 MHz signal to the internal digital

Counter as selected by the TONE

SELECT Switch.

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