Agilent Technologies 83620A User Manual

3.
Fractional-N
Reference
and
API
Spurs
Note
Do
not p
erform this
adjustment
on a
new
or
rebuilt
replacemen
t
assem
bly
.
The
A4
assem
bly
is
factory-adjusted,
and
is
not
instrumen
t
dep
enden
t.
Description
and
Procedure
This
adjustmen
t
minimizes
three
kno
wn
spurs
(125
kHz
reference,
API1,
and
API2).
A
t
eac
h
spur
frequency
,
the
sp
ectrum
analyzer
is
phase
lo c
k
ed
to
the
syn
thesizer,
connected
directly
to
the
A4
fractional-N
assem
bly
output,
and
op erated
in
zero
span.
A4R70,
R31,
and
R30
are
adjusted
for
minim
um
spur
lev
el.
T
able 3-1
summarizes this
adjustment.
T
able
3-1.
Summary
of Fractional-N
Reference &
API
Spurs
Adjustment
Spur F
ractional-N
CW
F
requency
(MHz)
Analyzer
F
requency
(MHz)
P
oten
tiometer
Minim
um
dBc
125
kHz
Reference
44
.
125
44
.
0
A4R70 0
75
API 1 44 .
005
44.
0
A4R31 0 70
API
2
44
.
0005
44
.
0055
A4R30 0
80
1.
With
the
A4
assem
bly
on
an analog
extender b
oard, connect
the equipmen
t
as
sho
wn
in
Figure
3-5
.
Preset
the
instrumen
ts,
and
let
them
w
arm
up for
at least
one hour.
HP 8360 Adjustments
Fractional-N Reference and API Spurs
3-13
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Agilent Technologies 83620A Specifications

General

Brand	Agilent Technologies
Model	83620A
Category	Blower
Language	English