HP 8753D Option 011

Figure IFW
A
VE7
here.
Figure
7-26.
Typical
1st
IF
W
a
v
eform
in
FRACN
TUNE/SRC TUNE
Mode
A11 Phase
Lock
Check
A
t
this
p
oin
t,
the
A11
phase
lo
c
k
assem
bly
app
ears
to
b
e
fault
y
(its
inputs
should ha
v
e
b
een
v
eried
already).
Nev
ertheless,
you
ma
y
elect
to
use
the
phase
lo
c
k
diagnostic
routines
or
c
hec
k
the
relev
an
t
signals
at
the
assem
bly
itself
for conrmation.
Note
If
external
source
mo
de is
the
only
op
erating
mo
de
with
phase
lo
c
k
problems,
replace
the
A11
phase
lo
c
k
assem
bly
.
DRAFT
3/21/106 15:13
Source Troubleshooting 7-31
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