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13.Round off the DVM value to two decimal places. Record this value as
V
:
o
• V
___________
o
14.Turn the power reference on:
System
Press
,
More
Inputs
15.Round off the DVM reading to two decimal places. Record this value as
V
:
1
• V
___________
1
16.Turn the power reference off:
System
Press
,
More
Inputs
17.Disconnect the DVM negative input lead from the V
Agilent 432A. Reconnect it to the Agilent 432A chassis ground.
18.Observe the reading on the DVM. Record this value as V
• V
___________
comp
19.Calculate the power measured from the power reference oscillator
using equation 2-9:
Equation 2-9:
(
2.V
V
comp
1
P
=
----------------------------------------------------------------------------- -
1
20.Record the value P :
1
• P
___________
1
21.Calculate the power measured with mount resistance set to 100Ω:
• Set the Agilent 432A mount resistance switch to 100Ω.
• Connect the equipment as shown in Figure 2-7 ensuring that the
DVM input leads are isolated from chassis ground.
• Repeat steps 15 to 20. Record the new values of V
V
___________
0
V
___________
1
V
___________
comp
22.Calculate the power measured from the power reference oscillator
using Equation 2-10 and record the value:
Equation 2-10
(
2.V
V
comp
1
P
=
----------------------------------------------------------------------------- -
2
Agilent E4418B/E4419B Service Guide
Output Standing Wave Ratio (SWR) Test
,
Power Ref On
.
,
.
Power Ref Off
2
2
)
–
V
+
V
–
V
0
0
1
4.R
1
2
2
)
–
V
+
V
–
V
0
0
1
4.R
2
Performance Tests
connector on the
RF
comp
, V
and V
:
0
1
comp
2-27
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