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FM
DISTORTION
CHECK
5
.
29
Test
Equipment
Required
Page 5-2 Table
5
Distortion
Analyser
Item
6
Modulation Meter
(9009)
Item
3
5.30
Procedure
(1)
Connect
the distortion
analyser
to
the
AF
output socket
of the
modulation meter.
(2)
Set the
UUT
controls as
in
para.
5.28
(1).
(3)
Tune
the
UUT
to
67MHz
on
the
32-64MHz
range.
(4)
Adjust
the
FM/Q'M COARSE
and
MOD
LEVEL
controls
on
the
UUT
to
give
100kHz peak
deviation reading
on
the
9009.
Verify
that the
total
harmonic
distortion
indicated
on
thedistortion
analyser
does not
exceed
4%.
(5)
Retain the
test
equipment
for
the
next
test.
PHASE
MODULATION
CHECK
5.31
Test
Equipment Required
Modulation Meter
Audio
Signal
Generator
(400
Hz
-5kHz)
Millivoltmeter
Distortion
Analyser
Frequency Counter
Page 5-2 Table 5
Item 3
Item
9
Item 8
Item
6
Item 10
5.32
PROCEDURE
(1)
Set the
UUT
controls as follows:-
OUTPUT
switch
to
NORMAL
METER
switch
to
FM/0M
FM/QM
switch
to
EXT
AM
switch
to
OFF
PEAK DEVIATION
switch
to
100kHz.
5-23
908
1
cl
9082
Vol.2
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