Series Resistors; Simple Output Matching With; Output Matching With Shunt; Output Matching With Resistive Network - HP 4436A Operating And Service Manual

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3-22. MATCHING AT THE OUTPUT
a. When the impedance of the load is lower than
that of the Model 4436A and the load is not af-
fected by a mismatch, impedance match for the
Model 4436Aoutput canbe obtainedby inserting
series resistors between 4436Aoutput and load
as shown in Figure 3-9. Resistor value should
be half of the difference between the Model4436A
output impedance and the load impedance.
the Model 4436A can be obtained by using two
shunting resistors across the Model4436Aoutput
as shown in Figure 3-10. For the Model4436A,
the shunting resistors should be 300 ohms.
b. When the impedance of the load is much higher
than that of the Model 4436A, on the order of
100, 000 ohms or more, impedance match for
c. Resistive matching networks or matching trans-
formers may be used to provide the Model 4436A
and its load with an impedance match. Figure
3-ll shows impedance matching with matching
network and Figure 3-12 shows impedance
matching with transformer. Similarly in match-
ing at the INPUT, the insertion loss ofthe resis-
tive network or the transformer should be
taken into account.
SOURCE
6000HMS
OUTPUT
IMPEDANCE
D-+------+-{]
MODEL 4436A
600 OHMS
IMPEDANCE
Figure 3-9. Simple Output Matching with Series Resistors
SOURCE
MODEL 4436A
LOAD
6000HMS ::
,...
0
RESISTOR
OUTPUT ,...
IMPEDANCE-
?
l
SOURCE
6000HMS
OUTPUT
-
600 OHMS
.()
IMPEDANCE
,....
300!1
-
0-:l.
Figure3-10. Output Matching with Shunt Resistors
MODEL 4436A
IMPEDANCE
0-+---------l'"""-<:
600 OHMS
IMPEDANCE
Figure 3-11. Output Matching with Resistive Network
MODEL
~436A SOURCE
6000HMS
OUTPUT
IMPEDANCE
0--+---------l~
600 OHMS
IMPEDANCE
o-t!------+-0--J_
Figure 3-12. Output Matching with Transformer
~300.0
LOAD
LOAD
,....
-
HIGH
,.., IMPEDANCE
-
INPUT
~?IOOKOHMS
LOAD
LOAD
3-5