Agilent Technologies 83620A - 9. Amplifier;Multiplier Adjustments

9.
Amplifier/Multiplier
Adjustments
Description
This pro
cedure maximizes
RF
p
o
w
er
b
y
trac
king
the
tuned
lter
in
the
amplier/m
ultiplier
to
the
RF
output
frequency
.
The
amplier/lter
output
is
also
monitored.
Initial
tracking
is done
in single
band sw
eeps
at
slo
w
sw
eep
speeds
to
eliminate
the
eects
of
bandcross
and
h
ysteresis
in
the
tuning
coil.
(Those
will
b
e
corrected
with
dela
y
and
risetime
calibration
constan
ts.) A
squegging
clamp
adjustmen
t
limits
the
p
o
w
er
into
the
amplier/m
ultiplier
and
is
adjusted
in
the amplier/lter
adjustments
for maxim
um output
p
o
w
er
without
squegging.
A
\squegg"
is
a
distortion
in
the
RF
output
caused b
yto
o
m
uc
h
p
o
w
er
to
the
amplier/m
ultiplier
and
c
haracterized
b
y
a
p
o
w
er drop
out
in
a
p
ortion
of the
trace, or
a
p
o
w
er
drop
out
o
v
er
a
broad
frequency
range.
The
SRD
bias
adjustmen
ts
are
made
to
optimize
the
eciency
of the
frequency
m
ultiplication.
The
YTM
dela
y
comp
ensation
adjustmen
ts
maximize
p
o
w
er
for
fast
single-
and m
ulti-band
sw
eeps.
Note
If
y
ou
ha
v
e
replaced
either
the
YO,
the
YO
driv
er,
or
the
m
ultiplier/lter
driv
er,
rst
initiate
an
auto
trac
king
(press
4
USER
CAL
5
N
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
N
N
N
Tracking
Menu
N
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
Auto
Track
.)
If
auto
trac
king
passes
and
the
instrumen
t
passes
the
\Maxim
um
Lev
eled
P
ow
er" p
erformance test,
do
not
con
tin
ue
with
this
pro
cedure.
If
auto
trac
king
fails,
(an
error
message
is displa
yed),
contin
ue
with
this
pro
cedure.
HP 8360 Adjustments
Amplifier/Multiplier Adjustments
3-31
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