IFR NAVAIR NAV-750

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NAVAIR

17—2OAX—737

4.6.15

Set

the TI

FREQUENCY

MHz

switches

to

108.000.

4.6.16

Adjust

the

TI

9960

FM

tone modulation

control

to

the

UNCAL

[fully

ccw

(0)]

position.

Setthe

distortion

analyzercontrols

for

distortionmeasurement

of a

30

Hz

fundamental,

as

applicable.

4.6.17 Verify

that

the

distortion

analyzer

indicates

~0.5%

total

harmonicdistortion.

4.6.18

Set

the TI

9960

FM

tone modulation

control

to

the

CAL

(UNCAL

lamp

off)

position.

4.6.19

Set

the

TI

frequency

switch

to

118.000

MHz.

Setthe

distortion

analyzercontrols

for

distortion

measurement

of a

1020

Hz

fundamental,

as

applicable.

4.6.20 Verify

that

the

distortion

analyzer

indicates

~0.5%

total

harmonicdistortion.

4.6.21

If

the

TI

is

a

NAV—750B,

proceed

withstep

4.6.22.

Otherwise,

if

the

TI is

not

a

NAV—750B,

skip

to

step

4.6.28.

4.6.22

Set

the TI

FREQUENCY

MHz

switches to

075.000,

and

the

Meter

function

and

Tone

Selector

switch

to

400 Hz.

4.6.23

Set

the

distortion

analyzer

controls

for

distortionmeasurement

of

a

400

Hz

fundamental,

as

applicable,

and verify

that

the

distortion

analyzer

indicates

~.0.7%

total

harmonicdistortion.

4.6.24

Set

the TI

meter

function

and

tone selector

switch

tol300

Hz.

4.6.25

Set

the

distortion

analyzercontrols

for

distortionmeasurement

of

a

1300

Hz

fundamental,

as

applicable,

and

verify

that

the

distortion

analyzer

indicates

0.7%

total

harmonicdistortion.

4.6.26

Set

the TI

meter

Function

and

the

Tone

Selector

switch

to

3000

Hz.

4.6.27

Set

the

distortion

analyzercontrols

for

distortionmeasurement

of a

3000

Hz

fundamental,

as

applicable,

and

verify

that

the

distortion

analyzer

indicates

~0.7%

total

harmonicdistortion.

4.6.28

Disconnect

the

distortion

analyzer

from

the

TI.

4.7

PERCENT

AMPLITUDE

MODULATION

OF

TONESAND

MODULATION

METER

TESTS

4.7.1

Setthe

TI

controls

as follows:

FREQUENCY

MHz switches

to

108.000

Meter

function

switch

to

0—30

9960

Hz FM

tone

MOD

control

to

UNCAL

[fully

ccw

(0)]

30

Hz

tone

MOD

control

to

CAL

(UNCAL

lamp

off)

1020

Hz

indent

tone

MOD

control

to

CAL

(UNCAL

lamp

off)

MASTER

MOD

control

to

CAL

(UNCAL

lamp

off)

Output

attenuator

control

to

—20

dBm

LOC—G/S

frequency

switch

to

LOC

LOC

DDM

switch

to

0

G/S

DDM

switch

to

0

15