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IFR NAVAIR NAV-750

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NAVAIR
17—2OAX—737
4.12.4
Setthe
TI
FREQUENCY
MHz
switches
to
each
of
the
following
settings. 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
4.12.5
Set
the
TI
FREQUENCY
MHz
switches
to
329.000.
4.12.6
Setthe
TI
FREQUENCY
MHz
switches
to
each
of
the
followingsettings.
At
each
setting,
verify
that
the
harmonics
(using
thespectrum
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
4.12.7
Setthe
TI
FREQUENCY
MHz
switches
334.700
MHz.
4.12.8
Set
the
spectrum
analyzer
for
a
frequencyspan
of
5
kF{z/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.
4.12.9 Verify
that
the
single—sideband noise level is
68
dB
below
the
carrier
level.
4.12.10
Set
the
TIFREQUENCY
MHz
switches
to
108.000.
4.12.11
Set
the
spectrum
analyzer
for
a
frequencyspan
of
5
kHz/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
108.000
MHz
carrier
frequency.
4.12.12
Verify
that
the
single—sideband
noise level is
74
dB
below
the
carrier
level.
NOTE
Set
thespectrum
analyzer
frequencyspan
and
center
frequency
controls
as
necessary
to
perform
the
tests
of
the
TI
harmonic
spurious
noise.
4.12.13
Verify
that
the
harmonic
spurious
noise
is
68
dB
below
the
carrier
level at
±12.5
kHz
from
the
TI
108.000
MHz
carrier
frequency.
4.12.14
Verify
that
the
harmonic
spurious
noise
is
71
dB
below
the
carrier
level at
±25.0
kHz
from
the
TI
108.000
MHz
carrier
frequency.
21