7.
External Lev
eling
Description
and Procedure
The syn
thesizer is
set up
to externally
level
using
a
negativ
e
crystal
detector.
A
D
VM
measures
the
crystal
detector
DC
output.
A
1000
pf
capacitor
across
the
D
VM
input
limits
the
eect
of
any
small signals
generated b
ythe
D
VM.
The
syn
thesizer
p
o
w
er
lev
el
is
set
to
the
minimum
allo
w
able
limit
and
then
is
increased
un
til
the
p
o
w
er
output
is
leveled.
The external
lev
eling
v
oltage
is
then
measured
and
compared
to
the minim
um sp
ecication. Next,
the
output
po
wer
is increased
until
the
maxim
um
lev
eled
p
o
w
er
is
reac
hed.
The
lev
eling
v
oltage
is
measured
and
compared
to
the
sp
ecication.
The
v
oltage
,
not
the
p
o
w
er
lev
el
,
is
what
is
imp
ortant
in p
erforming this
test.
If
y
ou
ha
v
e
problems
ac
hieving
the sp
ecied v
oltages in
this
test,
y
ou
ma
y
place
a
pad
in
the
RF path
before
the crystal
detector
or
the
coupling
factors
ma
y
b
e
c
hanged
to
ac
hiev
e
the
sp
ecied
v
oltages.
Note
The
syn
thesizer
m
ust
meet
the
p
o
w
er
atness
sp
ecication
b
efore
pro
ceeding
with
this test.
1.
Preset
all
instrumen
ts
sho
wn
in
Figure
2-8
and
let
them
w
arm
up
for
at least
one hour.
Figure 2-8.
External Lev
eling T
est
Setup
Equipment
Digital V
oltmeter HP/Agilent 3456A
Crystal Detector
HP/Agilent 33330E (83640B/L
and 83650B/L)
Crystal Detector
HP/Agilent 33330D (83620B/22B/24B,
83623B/L, and 83630B/L)
Capacitor 1000 pf
P/N 0160-4574
2. Toachieve p eak power, initiate auto tracking on the synthesizer as follows: terminate the
RF output with a go o d 50 imp edance match such as a 10 dB attenuator or a power
sensor (not necessary for synthesizers with a step attenuator). Press:
4
USER CAL
5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Tracking Menu
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Auto Track
(asterisk on)
Wait for the synthesizer to complete auto tracking b efore continuing to the next step.
2-30 Performance Tests
External Leveling
Agilent 8360
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