For
the
HP
83640A/50A
only
,
also
set:
4
SERVICE
5
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
N
N
N
N
N
N
N
N
N
Tools
Menu
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
Disable
Doubler
(asterisk
on)
94. Decrease
the syn
thesizer
p
o
w
er
lev
el
un
til
the
lev
el
of
the
en
tire
trace
on
the
oscilloscop
e
b
egins
to
drop.
Note
The
oscilloscop
e
v
ertical
sensitivit
y
is initially
set to
50 mV/division
(5
mV/division
with
a
10:1
prob
e)
pro
viding
a
logarithmic
scale
of
1.5
dB/division.
If
necessary
,
decrease
the
v
ertical sensitivit
y for
some frequency
bands
to
100
mV/division in
order
to
displa
y
the
en
tire
trace
on
the
CR
T
(the
oscilloscop
e
is
already
set
to
10
mV/division
for
the
HP
83623A/24A
).
If
y
ou
do
c
hange
the
v
ertical
sensitivit
y
b
y
half, remem
ber
that the
logarithmic scale
m
ust
c
hange
b
y
half
also.
Band
1
Adjustment.
95. Switc
h
b
et
w
een
the
fastest
sw
eep
time
(0
ms)
and
200
ms
sw
eep
time
and
c
hec
k
that
p
o
w
er c
hanges
less
than
2/3
division
(
1
dB.)
If
not,
adjust
the
appropriate
rise
or
dela
y
term
(steps
98
through
100)
and
rep
eat
this
step.
Note
If
fast
sw
eep
has
more
p
o
w
er
than
slow
sweep
do
not
readjust.
Con
tin
ue
with
the
next
step.
96. On
the syn
thesizer, set:
4
SWEEP
TIME
5
4
0
5
4
msec
5
97.
Press
4
SINGLE
5
sev
eral
times
to
initiate
sev
eral
sw
eeps
and
c
hec
k
that
a
drop in
po
wer
1
division
o
ccurs
when
in
single
sw
eep.
If
it
is
less than
1 division, skip
the remainder of \Band 1 Adjustmen
t" and con
tinue with
\Band 2 Adjustmen
t".
If the drop in p o
wer is
>
1 division, increase the A term
of the dela
y
adjustment #561 to put the
A term at the high end of the p eak.
Then rep eat from step 95.
98. Adjust calibration constan
t #561, YTF Dly T
erm A
Hrm 1, to maximize
power for the lo
w end of band 1. Set the calibration constan
t for the
middle of the peaked range.
HP 8360 Adjustments
Amplifier/Filter Adjustments
3-73
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