Agilent Technologies E4418B - Page 64

Performance Tests
Output Standing Wave Ratio (SWR) Test
2-28 Agilent E4418B/E4419B Service Guide
25.Calculate factor M using equation 2-11 and record the value:
Equation 2-11:
•M ___________
26.Calculate the value of the output voltage reflection coefficient (|Γ
s
|)
using equation 2-12 and record the value:
Equation 2-12:
One of the roots of this equation will be non-physical while the other
gives a value for |Γ
s
|.
•|Γ
s
|___________
27.Calculate the value of the output SWR using Equation 2-13 and record
the value:
Equation 2-13:
•Output SWR ___________
28.Verify that the output SWR is not greater than the maximum value
shown in the following table:
Where:
M
P
1
P
2
------
1 Γ
2
2
–()
1 Γ
1
2
–()
----- ---------------------
=
Where:
Γ
s
2 Γ
1
M2Γ
2
–()2 Γ
2
2 Γ
1
M–()
2
4 Γ
1
2
M Γ
2
2
–()M1–()–±
2 Γ
1
2
M Γ
2
2
–()
------ ------------------------------------------ ------------- ------------------------------------------- --------------------------------------------------- ----------=
SWR
1 Γ
s
+()
1 Γ
s
–()
------ -----------------=
4402serv.book Page 28 Tuesday, October 14, 2003 3:18 PM