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ction
V
Model
339A
j.
Set the
FUNCTION
switch of the
339A
under
test
to
INPUT
LEVEL.
k.
Adjust
the
output of
the
339A
being used
as
a
source
for a tnetcr indication of
0
dB
V,
l.
Return
the
339A
under
test
to
the
DISTORTION
FUNCTION.
The
null
depth must
be
>-100
dB.
If
not
readjust
A4RI6and A4R43
until
the
null
depth
is>
100
dB
at
both
input
levels,
m.
Set the
FUNCTION
switch
of the
339A
under
test
to
INPUT LEVEL
and
the
FREQUENCY
controls
fora
frequency of
10
Hz
(1.0
x
10).
n.
Set the
frequency of
the
339A
being used a
signal
rce to 10
Hz
(
1.0
x
10).
Adjust
the
output
level
for
a
er
indication
of-lOdB
V
on
the
instrument
under
test,
o.
Enter
an
output frequency of
10
Hz
and
a
step
frequency of
0.1
Hz
into the
3330B.
60
kO
1%
Metal Film
Resistor
(-hp-
Pan No
0698-5973)
a.
Connect
the
equipment
as
shown
in
Figure
5-2.
b.
Set
the
339A
(under
lest)
controls
as follows:
FUNCTION
DISTORTION
FILTERS
OFF
(out)
METER RESPONSE
NORMAL
DISTORTION
RANGE...,
.
,-80dB
INPUT
RANGE
IV
INPUT,
GND
SELECT....
DIS.
AN.
x
[center position)
FREQUENCY
IU
kHz
(1.0
x
10
K>
OSCILLATOR LEVEL
OFF
c.
Adjust
the
339A
being used as
a signal
source
to
provide
a
10
kHz.
I
V
signal.
d.
Set
the
3571
A
Tracking
Spectrum
Analyzer
controls as
follows:
p
Set the
Bandwidth
of
the
3571
A
to
3
Hz.
q.
Step
the
Synthesizer frequency
up
or
down
as
necessary
to
obtain
a
peak
reading
on
the
357
1
A.
r.
Press the
357IA
ENTER OFFSET
button
and
observe
a display
reading of 00.00
dB
V.
s.
Enter
the
frequency displayed
on
the
Synthesizer
as
the step
frequency. 5tep
the
frequency
of the Synthesizer
to the
second
harmonic
of the original
frequency (one
step).
C
Set the
FUNCTION
switch
ofthe339A
under
test
to
DISTORTION
Adjust
A4R65
(INPUT
BALANCE
ADJUST)
for
a
minimum
reading
on
Lhe
357
1
A
(Greatest negative
reading.)
5*18.
High
Frequency
Adjustment.
Equipment
Required:
Spectrum
Analyzer
(-hp-
Model 3044A)
Low
Distortion Oscillator
(-hp-
Model 339A)
600
D
1%
Metal
Film
Resistor
(-hp-
Part
No.
0698-5405}
DISPLAY
REFERENCE
....
RELATIVE
DISPLAY
SMOOTHING
ON
BANDWIDTH
3
Hz
INPUT
RANGE
HO
dB
V
INPUT
IMPEDANCE
|
VIII
e.
Set the
3330 B
Automaiic
Synthesizer controls
as
follows:
LEVELING
SLOW
TIME,
STEP
3000 mSec.
Enter an output frequency of
I
k
Hz, an output ampltiude
of
-40
dBm,
and an
amplitude
step
level
uf.
I
dBm
t,
Step
the
3330B
amplitude
until
the
339A
under
test
indicates
a
distortion
reading
of -80
dB
V
g.
Press the
357IA
ENTER OFFSET
button
and
observe
a
display reading of
OO.Ofl
dB
h.
Enter an output frequency of
20
kHz
into the
3330B
i.
Adjust
A3CIS
(HIGH
FREQUENCY
ADJUST)
fora
3571
A
display reading of
-0.3
dB F
0.1
dB.
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