IFR NAVAIR NAV-750

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NAVAIR

17—2OAX—737

4.13.4

Setthe

TI

FREQUENCY

MHz

switches

to

each

of

the

followingsettings.

At

each

setting,

verify

that

the

harmonics

(using

the

spectrum

analyzer

tuned

to

the

TI

frequencies

and

its

harmonics)

of all the

selected

TI

frequencies

are

~30

dB below the

carrier

level.

TI

FREQUENCY

MHz

Switches

Setting

108.000

115.000

130.000

145.000

157

.000

4.13.5

Setthe

TI

FREQUENCY

MHz

switches

to

329.000.

4.13.6

Setthe

TI

FREQUENCY

MHz

switches

to

each

of

the

followingsettings.

At

each

setting,

verify

that

the

harmonics

(using

the

spectrum

analyzer

tuned

to

the

TI

frequencies

and

its

harmonics)

of

all

the

selected

TI

frequencies

are

30

dB

below

the

carrier

level.

TI

FREQUENCY

MHz

Switches

Setting

329.000

332.000

335.000

4.13.7

Set

the TI

FREQUENCY

MHz

switches

334.700 MHz.

4.13.8

Set

the

spectrum

analyzer

for

a

frequency

span

of

5

kI-Iz/div,

the

resolution bandwidth

to

300

Hz,

the

video

bandwidth

to

10

Hz,

and

the

reference

level

and

positioncontrols

as

necessary

for

a

single—sideband

noise

measurement

at

±20

kHz

from

the

TI 334.700

MHz

carrier

frequency.

4.13.9 Verify

that

the

single—sideband

noise

level is

.74

dB

below

the

carrier

level.

4.13.10

Set

the

TI

frequency

switches

to

130.000

MHz.

4.13.11

Set

the

spectrum

analyzer

for

a

frequency

span

of

5

kHzidiv,

the

resolution bandwidth

to

300

Hz,

the

video

bandwidth

to

10

Hz, and the

reference

level

and

position

controls

as

necessary

for

a

single—sideband

noise

measurement

at

±15

kHz

from

the

TI

130.000

MHz

carrier

frequency.

4.13.12

Verify

that

the

single—sideband

noise

level is~78

dB

below

the

carrier

level.

4.13.13

Set

the TI

FREQUENCY

MIIz

switches

to

108.000.

4.13.14

Setthespectrum

analyzer

for

a

frequency

span

of

5

kHz/div,

the

resolution bandwidth

to

300Hz,

the

video

bandwidth

to

10

Hz,

and

the

reference

level

and

positioncontrols

as

necessary

for

a

single—sideband

noise

measurement

at

±15

kHz

from

the

TI

108.000

MHz

carrier

frequency.

4.13.15

Verify

that

the

single—sideband

noise level

is

78

dB

below

the

carrier

level.

NOTE

Set

the

spectrum

analyzer

frequency

span

and

center

frequency

controls

as

necessary

to

perform

the

tests

of

the

TI

harmonic

spurious

noise.

23