Figure
3-20.
A12
Assembly
P
otentiometer
Locations
34.
Set
calibration
constan
t
#623,
YTF
Gain;
Band
3,
to
2084.
35.
Mo
dify
calibration
constan
t
#633,
YTF
Oset;
Band
3,
to
maximize
lo
w
end
p
o
w
er.
36.
Adjust
A12R108 B3S1
(see Figure
3-20
)
for
maxim
um
p
o
w
er
o
v
er
the
rest
of
the
sw
eep
(3
to
10
divisions).
37.
Rep
eat
steps
33
and
34
un
til
p
o
w
er
is
optimized
o
v
er
the full
band.
38.
Record the
v
alue
of
calibration
constan
t
#633,
YTF
Oset;
Band
3
.
Step do
wn
the
calibration
constan
t
in
100
coun
t
steps
and
v
erify
that
the
en
tire
trace
shifts
do
wn
ev
enly
.
If
the p
ow
er
c
hange
is
not
uniform,
rep
eat
steps
31
through
35
un
til
it
is.
Then
c
hange
calibration
constant
#633 bac
k
to
the
recorded
v
alue.
39.
On
the
syn
thesizer,
set:
4
PO
WER LEVEL
5
4
0
5
4
dBm
5
40.
Adjust
calibration constan
t #133,
Squegg Clamp
3A,
to
maximize
RF
output
p
o
w
er
across
the
band.
41.
If
y
ou
ha
v
e
an
83623B
/L
or
an
83624B
,
con
tin
ue with
\Band 4
Adjustment."
Otherwise,
adjust calibration
constant
#133, Squegg
Clamp
3A
as
describ
ed
here,
to
protect
the
bridge
detector
from
excessive
po
wer:
a. Set the oscilloscop e v
ertical position as necessary to displa
y the trace.
b. On the syn
thesizer, set:
SWEEP
4
MENU
5
NNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNN
Manual Sweep
(asterisk on)
c. Using the rotary knob, nd the p eak of the sw
eep as displa
yed b
y the oscilloscop e.
d. If
the po
wer lev
el of the p eak poin
t is greater than 21.5 dBm for 83620B/22B and
83630B/L or 22.3 dBm for 83640B/L and 83650B/L, as displa
yed on
the po
wer meter,
decrease Squegg Clamp 3A un
til
the po
wer lev
el is less than these v
alues.
If the p ower level of the peak point is already less than these values, return the
synthesizer to continuous sweep and decrease Squegg Clamp 3A just until the peak
point begins to drop
(this indicates that power to the bridge detector is clamp ed).
Agilent 8360 Adjustments
Amplifier/Filter Adjustments
3-45
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