Agilent Technologies 83640B Service Guide

Input Coupling:
DC
Input
Impedance:
1
M
Sweep
Mode:
A
versus B
Adjust
Channel
A oset,
volts/division,
and horizon
tal p
osition con
trols for
a trace
that
lls
the full
horizontal
display
.
Adjust
the
v
ertical
p
osition
with
the
A
v
ertical p
osition
con
trol.
Note
In
the follo
wing adjustmen
t
p
o
w
er
drop
outs
ma
y
o
ccur
due
to
squegging.
Ignore
the
squegging
(the
squegg
clamp
will
b
e
adjusted
later)
and
p
eak the
adjustmen
t
for
maxim
um p
ow
er.
7.
Decrease
the
syn
thesizer
p
o
w
er
level
until
the lev
el
of
the
en
tire
trace
on
the
oscilloscop
e
begins
to drop.
8.
Adjust
A12R126
YTF
G
to
maximize
high
end
p
o
w
er
(last
t
w
o horizon
tal displa
y
divisions).
9. Mo
dify calibration
constan
t
#631,
YTF
Oset;
Band
1,
to
maximize
lo
w
end
p
o
w
er.
10.
Rep
eat
steps
8
and
9
un
til
the
en
tire
band
is
p
eak
ed.
11.
Record
the
value
of calibration
constant
#631,
YTF
Oset;
Band
1
.
Step
down
the calibration
constant
in 100
coun
t
steps
and
v
erify
that
the
en
tire
trace
shifts
do
wn
ev
enly
.
If
the
p
o
wer
change
is
not
uniform,
rep
eat
steps
7
through
10
un
til
it
is.
Then
c
hange
calibration
constan
t
#631
bac
k
to
the
recorded
v
alue.
12.
On the
syn
thesizer,
set:
4
PO
WER
LEVEL
5
4
0
5
4
dBm
5
13.
Adjust
calibration
constan
t
#131,
Squegg
Clamp
1A,
to
maximize
RF
output
p
o
wer
across
the
band.
The
clamp
is
adjusted
correctly
when
the
follo
wing
is
true:
a.
An
increase
in
the
calibration
constan
t
v
alue
decreases
the
output
p
o
w
er.
b.
A
small
decrease
in
the calibration
constan
t
v
alue
results
in
no
c
hange
in
output
p
o
w
er.
14.
If
y
ou
ha
v
e
an
83623B
or
an
83624B
,
con
tin
ue
with
\Band
2
Adjustment."
If y
ou
ha
v
e
an
83623L,
contin
ue with
the
next
step.
Otherwise,
adjust
calibration
constan
t
#131,
Squegg
Clamp
1A
as
describ
ed
here,
to
protect the
bridge detector
from excessiv
e
p
o
w
er:
a.
Set
the
oscilloscop
e
v
ertical
p
osition
as
necessary
to
displa
y
the
trace.
b.
On the
synthesizer,
set:
SWEEP
4
MENU
5
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
Manual
Sweep
(asterisk
on)
c. Using
the rotary
knob, nd
the p
eak of
the
sw
eep
as
displa
y
ed
b
y
the
oscilloscop
e.
d. If the p
ower level of the peak poin
t is greater than 21.5 dBm for 83620B
/22B and
83630B/L or 23.5 dBm for 83640B/L and 83650B
/L, as displa
yed on the p o
wer meter,
decrease Squegg Clamp 1A un
til the po
wer level is less than these v
alues.
If the p o
wer
level of the peak poin
t is already less than these v
alues, return the
synthesizer to con
tinuous sw
eep and decrease Squegg Clamp 1A just un
til the p eak
poin
t b egins to drop (this indicates that p
ower to the bridge detector is clamp ed).
15. If y
ou have an 83623L, adjust calibration constan
t #131, Squegg Clamp 1A as described
here. Otherwise, continue with the next step.
a. Set the synthesizer's sweep time to 500 ms.
b. Adjust the calibration constant #131, Squegg Clamp 1A for maximum p ower without
squegging.
c. Check for squegging by setting the synthesizer's sweep time to 0 ms. If the power
increase is greater 2 dB in any part of the band, then squegging is occurring.
3-42 Adjustments
Amplifier/Filter Adjustments
Agilent 8360

Agilent Technologies 83640B Specifications

General

Brand	Agilent Technologies
Model	83640B
Category	Portable Generator
Language	English