
No
de
29
FN
V
CO
T
un
(A14
FN
V
CO
tuning
v
oltage)
P
erform
step
A14,
ab o
v
e,
and
then
press
4
MEAS
5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
ANALOG
IN
4
29
5
4
x1
5
4
SCALE
REF
5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
AUTOSCALE
.
Observ
e
the
A14
FN
V
CO
tuning
v
oltage.
If
the
A13
and
A14
assem
blies
are
functioning
correctly
and
the
V
CO
is
phase
lo
c
k
ed,
the
trace
should
lo
ok
like
Figure
10-15.
An
y
other
w
a
v
eform
indicates
that
the
FN
V
CO
is
not
phase
lo
c
k
ed.
The
v
ertical
lines
in
the
trace
indicate
the
band
crossings.
(The
coun
ter
can
also
b e
enabled
to
coun
t
the
V
CO
frequency
in
CW
mo
de.)
Figure
NODE29
here.
Figure
10-15.
Analog
Bus
Node
29
10-36
Service
Key
Menus
and
Error
Messages
DRAFT
3/21/106
15:14
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