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.ection
IV
Model
339A
Table
4-6.
Fundamental
Rejection
and Induced
Distortion Test.
Test
Frequency
Fundamental
Rejection
Specification
Induced
Distortion
Specification
10 Hz
100
Hz
1
kHz
10 kHz
20
kHz
>
-100 dB
>
-90
dB
30
kHz
>
-90 B
>
-90
dB
50
kHz
>
-85
dB
1
10 kHz
>
-70
dB
k.
Determine
the
relative
amplitude
of the
second
«
|monic by
adding
the
Spectrum
Analyzer
display
ding
and
the distortion
range
setting
of the
339A
under
test.
Record
the
amplitude
reading of
the
second
harmonic.
o.
The
induced
distortion
measurement must meet
or
exceed
the specification
listed in
Table
4-6.
p.
Set the
FUNCTION
switch of the
339A
under
test
to
INPUT
LEVEL.
q.
Repeat
Steps
c
through
p
for
each frequency
listed
in
Table
4-6.
4-24. Distortion
Measurement Accuracy
Test.
Equipment
Required:
Spectrum
Analyzer
(-hp-
Model
3044A)
Low
Distortion
Oscillator (-hp-
Model
339A)
600
fl
1%
Metal Film
Resistor (-hp- Part
No.
0698-5405)
60
k
Q
1
%
Metal Film
Resistor (-hp- Part
No.
0698-5973)
a.
Set the
339A
controls
as follows:
l.
Step
the
Synthesizer
frequency
to
the
third
harmonic
frequency.
m. Determine
the
relative
amplitude
of the
third
harmonic by adding
the
Spectrum
Analyzer
display
reading
and
the distortion
range
setting
of the
339A
under
test.
Record
the
amplitude
reading of
the third
harmonic.
FUNCTION
INPUT LEVEL
FILTERS
OFF
(out)
DISTORTION
RANGE
-80
dB
INPUT
RANGE
IV
INPUT/
GND
SELECT
....
DIS. AN./J.
(center position)
FREQUENCY
10
kHz
(1.0
x
10
K)
n.
Calculate the
Induced
Harmonic
Distortion using
b
'
C
°
nnect
the
equipment
as
shown
ln
Fi
S ure 4
'>
>•
the
graph
shown
in
Figure
4-9.
4-10
Figure
4-11. Distortion
Measurement
Accuracy
Test.
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