Agilent Technologies 83620A - Spurious Signals (Line-Related)

10.
Spurious
Signals
(Line-Related)
Description
and Procedure
Use this
pro cedure
to
measure
line-related
spurs.
The
syn
thesizer
is
placed
at
a
CW
frequency
where
the
syn
thesizer
is
most
sensitiv
e
to
line-related spurs.
The
sp
ectrum
analyzer measures
the RF
output oset
by
the
harmonics
of
the
line p
o
w
er
frequency
(60
Hz
or
50
Hz).
T
o
eliminate
measuring
the
sp
ectrum
analyzer
line-related
spurs,
an
In
v
ertron
is
used
to
op
erate
the sp
ectrum
analyzer
at
a
dieren
t
line
frequency
so
that
its
own
spurs
will
not
aect
the
measuremen
t.
The
sp
ectrum analyzer
must
hav
ethe
capabilit
y
of
a
10
Hz
resolution
bandwidth.
A
wider
resolution
bandwidth
results
in
the
syn
thesizer's
phase
noise
masking
the
spur.
1.
Set
the in
vertron
for
a
line
frequency
of
55
Hz
and
for
normal
op
erating
v
oltage.
2.
Connect
the
equipmen
t
as
sho
wn
in
Figure
2-12
.
Preset
the
instrumen
ts
and let
them
w
arm
up
for
at
least
one
hour.
Figure 2-12. Spurious signals (Line-Related) T
est Setup
Equipment
Spectrum
Analyzer HP 8566B
Inv
ertron California Instruments 501TC
2-56 Performance Tests
Spurious Signals (Line-Related)
HP 8360
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