HP 8753D Option 011

No
de
26
Ext
Ref
(rear
panel
external
reference
input)
P
erform
step
A12,
abo
ve,
and then
press 4
MEAS
5
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
NN
NN
NN
N
N
N
N
N
ANALOG
IN
4
26
5
4
x1
5
.
The
v
oltage
lev
el
of
this
no
de
indicates
whether
an external
reference timebase
is b
eing used:
No
external
reference: ab
out 0
0.9 V
With
external reference:
about
0
0.6
V
No
de
27
V
CX
O
T
une
(40
MHz
V
CX
O
tuning v
oltage)
P
erform
step
A12,
ab
o
v
e, and
then press
4
MEAS
5
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
ANALOG
IN
4
27
5
4
x1
5
4
MARKER
F
CTN
5
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
N
N
NN
NN
NN
NN
N
N
N
MARKER
REFERENCE
.
This
no
de
displa
ys
the
v
oltage
used
to
ne
tune
the
A12
reference
V
CX
Oto
40 MHz.
You
should
see
a
at
line
at
some
v
oltage lev
el (the
actual v
oltage
lev
el
v
aries
from
instrumen
t
to
instrumen
t). An
ything other
than
a
at
line
indicates
that
the
V
CX
O
is
tuning
to
dieren
t
frequencies.
Refer
to
the
\F
requency
Accuracy"
adjustmen
t
pro
cedure.
No
de
28
A12
Gnd
2
(Ground
reference)
A14
Fractional-N
(Digital)
T
o
observ
e
the
A14
analog
bus
no
des
p
erform
step
A14,
b
elo
w.
Then follo
wthe
node-sp
ecic
instructions.
Step
A14.
Press:
4
PRESET
5
4
MEAS
5
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
ANALOG
IN
4
SYSTEM
5
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
NN
SERVICE
MENU
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
NN
N
N
N
ANALOG
BUS
ON
4
F
ORMAT
5
N
N
N
N
N
NN
N
N
N
N
N
N
N
MORE
N
N
N
N
N
NN
N
N
N
N
N
N
N
REAL
DRAFT
3/21/106 15:14
Service Key Menus and Error Messages 10-35
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