Compensating
for
the
Electrical Delay
Caused by
an Extension
Cable
If
the Electrical
Delay of
the
Extension
Cable
is
Unknown
Y
ou can
determine
the
electrical
delay
of
the
extension
cable
by:
Measuring
the electrical
delay
of
the
cable
Measuring
the cable's
reection
in
the
OPEN
or
SHORT
circuit
state
.
Measuring
the
Electrical
Length
of
a
Cable
.
1.
Connect
the
cable
as
shown
in
Figure
8-17
.
2.
Dene
the
frequency
range
according
to
the
measurement
conditions
.
3.
Press
4
Meas
5
NN
N
N
N
N
N
N
N
N
N
B/R
(or
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
S
PARAMETERS
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
Trans:
FWD
S21
[B/R]
)
to
select
the
transmission
measurement.
4.
Press
4
F
o
rmat
5
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
PHASE
to
select
the
phase
format.
5.
Press
4
Ma
rk
er
5
.
Then
move
the
marker to
the sloping
trace that
crosses
the
center
of
the
display
.
6.
Press
4
Cal
5
N
N
N
N
N
N
N
N
N
N
N
N
NN
MORE
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
N
ELEC
DELAY
MENU
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
MKR
!
DELAY
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
N
N
N
N
ELECTRICAL
DELAY
,
then
read
the
electrical
delay
of
the
cable
.
7. Press
4
0
54
2
1
5
to
clear the
electrical delay
oset.
8. Enter
a measured
electrical delay
as described
in
the
\If
the
Electrical
Delay
of
the
Extension
Cable
is Known
" procedure
.
Figure 8-17. Cable Measurement Conguration (Transmission)
Reection of a Opened or Shorted Cable
.
1. Connect the cable as shown in Figure 8-18.
2. Dene the frequency range according to the measurement conditions.
3.
Press
4
Meas
5
NNNNNNNNNNN
A/R
(or
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
S PARAMETERS
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Refl:FWD S11 [A/R]
) to select the reection
measurement.
4. Press
4
Format
5
NNNNNNNNNNNNNNNNN
PHASE
to select the phase format.
8-32 Analyzing the Measurement Results
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