Figure LOSS9
here.
Figure
9-1.
Typical
Return
Loss
Traces
of
Good
and
P
oor Cables
Verify
Shorts
and
Opens
Substitute
a
kno
wn
go
o
d
short
and
op
en
of
the
same
connector
typ
e
and
sex
as
the
short
and
op
en
in
question.
If
the
devices
are
not
from
one
of
the
standard
calibration
kits,
refer
to
the
HP
8753D
Network A
nalyzer
User's
Guide
for
information
on
ho
w
to
use
the
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MODIFY
CAL
KIT
function.
Set
aside
the
short
and
op
en
that
are causing
the
problem.
1.
P
erform
an
S11
1-port
calibration using
the
go
o
d
short
and
op
en.
Then
press
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FORMAT
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SMITH CHART
to
view
the
devices
in
Smith
c
hart
format.
2.
Connect
the
go
o
d
short
to
p
ort
1.
Press
4
SCALE REF
5
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ELECTRICAL
DELAY
and
turn
the
fron
t
panel
knob
to
en
ter
enough
electrical
dela
y
so
that
the
trace
appears
as a
dot at
the
left
side
of the
circle
(see
Figure
9-2
a,
left).
Replace
the
go
o
d
short
with
the
questionable
short
at
p
ort
1.
The
trace
of
the
questionable
short should
appear
very
similar to
the kno
wn go
o
d
short.
3.
Connect the go od op
en to port 1. Press
4
SCALE REF
5
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ELECTRICAL DELAY
and turn the fron
t
panel knob to
enter enough electrical dela
y so that the trace app ears as a dot at the righ
t
side of the circle (see Figure 9-2
b, righ
t).
Replace the go o d op en with the questionable op en at port
1. The trace of the questionable
open should app ear
very similar to the kno
wn go od op en.
DRAFT
3/21/106 15:13
Accessories Troubleshooting 9-5
Artisan Scientific - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisan-scientific.com
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