HP 8753D Option 011

Ho
wto
Set Up
the
High/Lo
w
Band
Transition
Adjustments
1.
Press
4
PRESET
5
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
SEQ
X
HBLBADJ
(where
Xis
the sequence
num
ber).
2.
Observ
e
the
V
CO
tuning
trace:
If
the
left
half
of
trace =
0 6
1000 mV
and righ
t
half
of
the
trace
=
100
to
200
mV
higher
(one to
tw
o
divisions),
no
adjustmen
t
is
necessary
.
If
the
adjustmen
t
is
necessary
,
follo
w
these
steps:
a.
Remo
v
e the
upper-rear
bumpers
and top
co
v
er,
using
a
torx
screwdriv
er.
b. Adjust
the
V
CO
tune
(A12
C85)
to
p
osition
the
left
half
of
the
trace
to
0
6 125
mV.
This
is
a
v
ery
sensitiv
e
adjustmen
t
where
the
trace
could easily
go o
of the
screen.
c.
Adjust
the
HBLB (A12
R68) to
position
the
righ
t
half
of
the
trace
125
to
175
mV
(ab
out
1
to
1.5
divisions)
higher
than
the
left
half.
Refer
to
\Source
T
roublesho
oting"
if
y
ou
cannot
p
erform
the adjustmen
t.
Ho
wto
Set Up
the
Fractional-N
Spur
Av
oidance
and
FM
Sideband
Adjustment
1.
Press
4
PRESET
5
N
N
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
SEQUENCE
X
APIADJ
(where
X
is
the
sequence
n
um
b
er).
2.
Remo
v
e the
upp
er-rear
corner
bump
ers
and
the
top
co
v
er,
using
a
torx
screwdriv
er.
3.
F
ollo
w
the
directions
on
the
analyzer
displa
y
and mak
e
all
of
the
API
adjustmen
ts.
Sequence
Contents
Sequence
for
the
High/Lo
w
Band
Transition
Adjustment
|Sequenc
e
HBLBADJ
sets
the
hi-b
and
to
low-b
and
switch
p
oint.|
PRESET
SYSTEM
SERVICE MENU
ANALOG BUS ON
START11M/u
STOP 21 M/u
MEAS
ANALOG
IN 22 x1 (A12 GND)
DISPLAY
DATA > MEM
DATA - MEM
MEAS
ANALOG IN 23 x1 (VCO TUNE)
MKR 11 M/u
DRAFT
3/21/106 15:11
Adjustments and Correction Constants 3-59
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