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IFR NAVAIR NAV-750 User Manual

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NAVAIR
17—2OAX—737
4.4
DEMOD
TONES
AND
DC
OFFSET
TESTS
4.4.1
Set the
TI
controls
as
follows:
BEARING-FREQ
switch
to
FREQ
MASTER
MOD
control
to CAL
(UNCAL
lamp off)
1020
Hz
indent
tone
MOD
control
to
CAL
(UNCAL
lamp off)
9960
Hz
FM
tone
MOD
control
to
CAL
(UNCAL
lamp
off)
30
Hz
tone
MOD
control
to
CAL
(UNCAL
lamp
off)
LOC
DDM
switch
to
0
G/S
DDM
switch
to
0
4.4.2
Connect
the
oscilloscope
vertical
amplifierinput
to
the
TI
rear
panel
DEMOD
jack.
Connect
the
DMM
voltage
input
to
the
TI
rear
panel
TONES
jack.
4.4.3
Set
the TI
oscilloscope
and
DMM
controls
as
necessary
to
measure
the
TI
signals
in the following
steps:
4.4.3.1
Setthe
TI
FREQUENCY
MHz
switches
to
108.100
MHz.
Ensure
that
the
TI
frequency
display
indicates
108.100,
and
the
LOC
mode
indicator
is on.
4.4.3.2
Set
the
TI
G/S
DDM
switch
to
90
Hz,
and
ensure
that
the
150
Hz
tone
offindicator
ison.
4.4.3.3 Verify
that
the
oscilloscope
displays
a
90
Hz
tone,
and
that
the
DMM
indicates
between
—40.0
and
+40.0
mV
dc.
4.4.3.4
Set
the
TI
LOC—G/S
frequency
switch
to
G/S.
4.4.3.5
Ensure
that
the
TI
frequency
display
indicates
334.700,
and
the G/S
mode
indicator
is
on.
4.4.3.6
Verify
that
the
oscilloscope
displays
a
90
Hz
tone,
and
that
the
DMM
indicates
between
—40.0
and
+40.0
mV dc.
4.4.3.7
Set the TI G/S
DDM
switch
to
150
Hz,
and
then
ensure
that
the
90
Hz
tone
offindicator
is
on.
4.4.3.8 Verify
that
the
oscilloscope
displays
a
150
Hz
tone,
and
that
the
DMM
indicates
between
—40
to
÷4OmVdc.
4.4.3.9
Set
the
TI
LOC—G/S
frequency
switch
to
LOC.
4.4.3.10
Ensure
that
the
TI
frequency
display
indicates
108.100,
the
90Hz
tone
offindicator
is on, and the
LOC
mode
indicator
is on.
4.4.3.11
Verify
that
the
oscilloscope
displays
a
150
Hz
tone,
and
that
the
DMM
indicates
between
—40
to
+4OmVdc.
4.4.3.12 Set the
TI
G/S
DDM
switch
to 0, and
the FREQUENCY
MHz
switches
to
108.000.
4.4.3.13
Ensure
that
the
TI
VOR
mode
indicator
is
on.
4.4.3.14
Verify
that
the
oscilloscope
displays a
9960
Hz
tone,
and
that
the
tone
is
both
frequency
and
amplitudemodulated
with
a
30
Hz
tone.
10

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IFR NAVAIR NAV-750 Specifications

General IconGeneral
BrandIFR
ModelNAVAIR NAV-750
CategoryTest Equipment
LanguageEnglish