HP 8753D Option 011

In-Phase 2nd
LO
Signals in
Low
Band. The
2nd
LO
signals
in
lo
w
band,
as
sho
wn
in
Figure
7-14
,
are
not
phase
shifted.
In
lo
w
band
these
signals trac
k the
RF output
with a
4
kHz
oset.
Figure
INPHAS7
here.
Figure
7-14. In-Phase
Low
Band 2nd
L
O
Signals
(14
MHz
CW)
If
an
y
of
the
signals
of
T
able
7-2
are
incorrect,
the
probabilit
y
is
90%
that
the
A12
assem
bly
is
fault
y
.
Either
consider the
A12
assem
bly
fault
y
or
p
erform
the
\A12
Digital
Con
trol
Signals
Chec
k"
describ
ed
b
elo
w.
7-20 Source Troubleshooting DRAFT
3/21/106 15:13
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