IFR NAVAIR NAV-750

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NAVAIR

17—2OAX—737

4.7.2

Connect

the

signal

generator

calibratorsensor

module

input

to

the

TI

RF

outputconnector.

4.7.3

Press

the

signal

generator

calibratorINSTR

PRESET

key

(Blue

key,

AUTOMATIC

OPERATION

key),

andensure

that

the

signal

generator

calibrator

is in

the

FREQ

measurement

mode

and

tunes

to

the

TI

FREQUENCY

MHz

switches

setting.

Set

the

signal

generator

calibrator

for

AM modulation

measurements

with

the

DETECTOR

set

to

PEAK

±12.

Activate

the

signal

generator

calibrator

3

kHz

LP

FILTER.

4.7.4

Verify

that

the

signal

generator

calibrator

indicates

between

28.8%

and

31.2% AM

modulation,

and

record

the

reading.

4.7.5

Verify

that

the

TI

meter

indicates

within

±1.2%

(AM

depth)

of

therecorded

value

in

step

4.7.4.

4.7.6

Set

the

TI

meter

function

switch

to

0—100,

and

then

set the TI

30

Hz

tone modulation

control

to

the

fully

cw

position.

4.7.7

Verify

that

the

signal

generator

calibrator

indicates

>60%

AM

modulation.

4.7.8

Set

the

TI

30

Hz

modulation

control

to

the

UNCAL

[fully

ccw

(0)]

position.

4.7.9

Set the

TI

1020

Hz

tone modulation

control

to

the

fully cw

position.

4.7.10

Activate

the

signal

generator

calibrator

50

HzHP

FILTER,

and

the

3

kHz

LP

FILTER.

Verify

that

the

signal

generator

calibrator

indicates

>60%

AM

modulation.

4.7.11

Set the

TI

1020

Hz

tone modulation

control

to

the

CAL

(UNCAL

lamp

off)

position,

and

the

9960

Hz

tone modulation

control

to

the

CAL

(UNCAL

lamp

off)

position.

4.7.12

Activate

the

signal

generator

calibrator

300

HzHP

FILTER,

and

the >20

kHz

LP

FILTER.

4.7.13 Verify

that

the

signal

generator

calibrator

indicates

between

28.8%

and

3

1.2%

AM modulation.

4.7.14

Set

the

TI

9960

Hz

tone modulation

control

to

the fully

cw

position.

4.7.15 Verify

that

the

signal

generator

calibrator

indicates

>60%

AM

modulation.

4.7.16

Setthe

TI

30

Hz

tone modulation

control

to

the

CAL

(UNCAL

lamp

off)

position,

and

the

9960

Hz

tone modulation

control

to

the CAL

(UNCAL

lamp off)

position.

4.7.17

Set

the

TI

FREQUENCY

MHz

switches

to

108.100.

Setthe

TI

G/S

DDM

switch

to

90

Hz.

4.7.18

Deactivate

the

signal

generator

calibrator

300

Hz

HP

FILTER,

and

activate

the

3

kHz

LP

FILTER.

4.7.19

Verify

that

the

signal

generator

calibrator

indicates

between

19.2%

and

20.8% AM

modulation.

4.7.20

Set

the

TI

G/S

DDM

switch

to

150

Hz,

and

the

TI

meter

function

switch

to

0—30.

4.7.21 Verify

that

the

signal

generator

calibrator

indicates

between

19.2%

and

20.8%

AM

modulation,

andrecord

the

reading.

4.7.22 Verify

that

the

TI

meter

indicates

within

±0.8%

of

the recorded

value

in

step

4.7.21.

4.7.23

Set

the TI

meter

Function

switch

to

0—100,

the

G/S

DDM

switch to 0,

the

LOC—G/S

switch to

G/S,

and

the

LOC

DDM

switch

to

90

Hz.

4.7.24 Verify

that

the

signal

generator

calibrator

indicates

between

38.4%

and

41.6%

AM

modulation.

16