steps 18
through
23.
Change
calibration
constan
t
#240
bac
k
to
its
original
v
alue.
Band
4
Adjustment
(HP
83630A/40A/50A
only).
25.
On
the syn
thesizer, press:
4
ST
ART
5
4
20
5
4
GHz
5
4
STOP
5
4
26.5
5
4
GHz
5
26.
See
Figure 3-15
and set:
A12R23
B4BP1
fully
clo
c
kwise.
A12R24
BP2
fully
clo
c
kwise.
A12R26
B4S1
fully
clo
c
kwise.
A12R27 S2
fully clo
ckwise.
27.
Set
the
oscilloscop
e
vertical
position
as necessary
to displa
y
the
trace.
28.
Mo
dify
calibration
constan
t
#241,
YTM
Oset;
Band
4,
to
maximize
po
w
er
at
the
v
ery
lo
w
end.
P
o
w
er
ma
y
p
eak
t
wice.
Adjust
to
the lo
wer
p
eak.
29.
Mo
dify
calibration
constan
t
#228,
YTM
Gain;
Band
4,
to
maximize p
ow
er
at
the
rst
division
on
the
displa
y
.
P
o
w
er
ma
y
p
eak
t
wice.
Adjust
to
the
lo
w
er
peak.
Note
If
there
is
no
noticeable
increase
in
p
o
w
er
in
the
next
t
w
o
adjustmen
ts,
lea
v
e
the
p
oten
tiometers
at
their
preset
p
osition
(fully
clo c
kwise).
30.
Adjust
A12R26
B4S1
for maxim
um high-end
po
wer.
P
o
w
er
ma
y
p
eak
t
wice.
Adjust
to
the
lo
w
er
p
eak.
31.
Adjust
A12R23
B4BP1
for
maxim
um
p
o
w
er
to
optimize
the
3rd
through
the
7th
divisions. Stop
when the
po
w
er
b
egins
to
decrease.
P
o
w
er
ma
y
p
eak
t
wice.
Adjust
to the
low
er p
eak.
32. Rep
eat
step
30.
33. Adjust band 4 SRD bias calibration constan
ts as follo
ws:
a. Incremen
t calibration constan
t
#108, SRD Bias A; Band 4, to maximize
lowend po
wer. Then decrease the calibration constan
tv
alue b
y15
counts.
b. Increment calibration constan
t #121, SRD Bias B; Band 4, to maximize
high end po
wer. Then decrease the po
wer b
y
one third division
(

1/2 dB).
34. Repeat steps 28 through 33 until the entire band is p eaked.
HP 8360 Adjustments
Amplifier/Multiplier Adjustments
3-43
To Next Page
Loading...
Need help?
General