Agilent Technologies E4418B Service Manual page 64

Performance Tests
Output Standing Wave Ratio (SWR) Test
25.Calculate factor M using equation 2-11 and record the value:
Equation 2-11:
( Γ
P 1 –
1
------ ------------------------- -
M
=
P
( Γ
1 –
2
Where:
• M ___________
26.Calculate the value of the output voltage reflection coefficient (|Γ
using equation 2-12 and record the value:
Equation 2-12:
( 2 Γ M 2 Γ
–
Γ
1
= -------------------------------------------------------------------------------------------------------------------------------------------------------------------- -
s
Where:
One of the roots of this equation will be non-physical while the other
gives a value for |Γ
• |Γ |___________
s
27.Calculate the value of the output SWR using Equation 2-13 and record
the value:
Equation 2-13:
( Γ
1 +
SWR = -----------------------
( Γ
1
–
• Output SWR ___________
28.Verify that the output SWR is not greater than the maximum value
shown in the following table:
2-28
2
)
2
2
)
1
) ± ( 2 Γ 2 Γ
M
–
2 2 1
2
2 Γ (
M –
1
|.
s
)
s
)
s
2 2 2
) 4 Γ ( Γ ) M 1 (
M
– –
1 2
2
Γ )
2
Agilent E4418B/E4419B Service Guide
|)
s
)
–