Filter
Top Products
CHl
CH2
PRm
Cot-
PRm
Cot-
T
5 Au9 1998
13:10:11
s21
LO8
10
dB/REF
-40
dB
s12
LOG
10
dB/REF
-40
dB
E
E
10
dB/REF
0
dB
10
dB.‘REF
0
dB
I
I
I
I
I
I
CHl/CH3
CENTER
860.000 000
MHz
SPAN
CHZ/CH4
120.000 000
MHz
CENTER
860.000 000
MHz
SPAN
120.000 000
MHz
Figure 2-7. Duplexer Measurement
Ref 1: FWD
Sll
<A/R)
Trans: FWD
521
<B/R)
Trans: REV
S12
<FI.‘R)
Ref 1: REV
S22
(B/R)
ANALOG IN
Aux Input
CONVERSION
COFFI
INPUT
PORTS
Normally, a
2-port
calibration requires a forward and reverse sweep to
Cnish
before updating
the displayed trace. For faster tuning, it is possible to set the number of sweeps for the
active display
(Sll
and
S21
for channel 1 in this case) to update more often than the unused
parameters. In this example we choose 8 updates of the forward parameters to 1 update of the
reverse in channel 1, and 8 updates of the reverse to 1 update of the forward in channel 2
(where the active parameters are
S22
and
S12).
::..
.....
press
I-1
Lj)
~~~~~~~~
~~~~~
:;~~~~~~~~
@
@J).
.._..............................-...-...-....................
_...
_.........
..:::::..
i
i..~.;;Li.>:.:
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SW....;;;...:....
..A.
ii
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...,
_
_
_
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Press
c-1
(77)
~~~~~~~~~~
~~~~~.~~
‘~~~~~~
@
(QJ1.
.._.....................................-.........
..^..
.,.
,...;
.
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;;;;
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i...~.,..i
.
.../...
.>.~.,.W_,.
../
2-16
Making Measurements