HP 8753D Option 011 - Sampler;Mixer and LO Checks

A4
Sampler/Mixer Check
The A4,
A5, and
A6 (R,
A and
B) sampler/mixers
are iden
tical. An
y
sampler
can
b
e
used
to
phase
lo c
kthe
source.
T
o
eliminate
the
p
ossibilit
y
of
a
bad
R sampler,
follow
this pro
cedure:
1.
Connect
the
p
o
w
er
splitter, RF
cable and
attenuator
to inputs
A (or
B) and
Ras
sho
wn
in
Figure
7-1
.
2.
Remo
v
e
the
W8
cable
(A11J1
to
A4)
from
the
R-c
hannel
sampler
(A4)
and
connect
it to
either
the
A-c
hannel
sampler
(A5)
or
the
B-c
hannel sampler
(A6), dep
ending on
which
one
you
selected in
step 1.
Refer to
Figure
7-3
.
Figure
SAMMIX7
here.
Figure
7-3.
Sampler/Mixer
to
Phase
Lock
Cable
Connection
Diagram
3.
If
y
ou
connected
W8
to:
A5
,press
4
MEAS
5
N
N
N
N
N
N
N
NN
NN
A/R
A6
,
press
4
MEAS
5
N
NN
NN
NN
N
N
N
N
B/R
4.
Ignore the
display
ed trace,
but c
hec
k
for
phase
lo
c
k
error
messages.
If
the
phase
lo
c
k
problem
p
ersists,
the
R-c
hannel
sampler is
not the
problem.
7-6 Source Troubleshooting DRAFT
3/21/106 15:13
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