Chapter 2. OPERATING INSTRUCTIONS - TM-11-5826-258-240017

TM 11-5826-258-24

CHAPTER 2

OPERATING INSTRUCTIONS

Section 1. CONTROLS AND INSTRUMENTS

2-2. Operator/Crew Controls

2-1. Damage from Improper Settings

Controls and indicators are illustrated in figure 1-1

No damage results from improper settings.

and identified in table 2-1.

Table 2-1. Operator Controls

NOTE

This table covers only items used by the operator. Items

used by higher category maintenance personnel are covered

in instructions for the appropriate maintenance category

Control,

indicator

Function

or connector

Provides power on/off control for VOR/LOC/GS/MB receiver sections.

NAV VOL-OFF control

Provides VOR/LOC audio output level control.

Provides independent MB audio output level control.

MB VOL-OFF control

Provides on/off control for optional switching of lamp common wire.

108.00 through 117.95 MHz in 50 kHZ steps.

Frequency range selection

Mechanically positions whole MHz wafer switches and units/tenths MHz frequency drums

Whole MHz control (left knob)

simultaneously.

Mechanically positions fractional MHz wafer switches and tenths/hundredths drums

Fractional MHz control (right knob)

simultaneously.

Activates VOR and MB lamp self-test circuits.

VOR/MB TEST control

MB SENS HI-LO control

Provides means of controlling MB sensitivity. (A ground is provided when switch is in HI

position.)

Section II. OPERATION UNDER USUAL CONDITIONS

2-3. Types of Operation

(2) Set the course card (in the illustrated example

205 radial) so that the desired direction of travel

The receiving set may be used as a VOR receiver or an

away from the VOR station is beneath the course in-

ILS receiver. The desired type of operation is selected

dex.

by tuning the receiving set to the frequency corre-

(3) Fly generally toward the destination. When

sponding to that operation: ILS operation is selected

by tuning to the odd tenth-MHz frequencies between

the to/from indicator indicates FR, fly in the direction

which centers the VOR/localizer needle.

108.00 and 112.00 MHz. VOR operation is selected by

(4) When the VOR/localizer needle is centered, the

tuning to the frequencies between 108.0 and 117.95

MHz, except the odd tenth-MHz between 108.00 and

aircraft is on the line from the station to the destina-

112.0 MHz which are reserved for ILS operation.

tion. By flying in the direction originally determined

and. keeping the VOR/localizer needle centered, the

2-4. Starting Procedure

destination will be reached.

b. Direct Flight to VOR Station.

a. Turn on the aircraft radio equipment primary

(1) To fly directly to a VOR station, tune to the

power.

VOR station and rotate the course card until the

b. Turn the NAV VOL-OFF control past the OFF

to/from indicator indicates TO and the VOR/localizer

detent to the desired audio volume.

needle is centered.

c. Set the control unit to the desired frequency.

(2) Fly in the direction read beneath the course

2-5. VOR Operation

index while keeping the VOR/localizer needle cen-

a. Flying From VOR Station. If the direction to a

tered.

c. Flying Selected Inbound Radial.

certain position (fig. 2-1) is known with respect to a

VOR station, that position can be reached as folows:

(1) Tune to the station and rotate the course card

(1) Tune the receiving set to the VOR station fre-

so that the desired course of approach is beneath the

quency.

course index. A TO indication should appear on the

2-1