Keysight Technologies E4417A

2 Performance Tests
66 Keysight E4416A/E4417A Power Meters Service Guide
25 Calculate factor M using equation 2-11 and record the value:
Equation 2-11:
–P
2
___________
26 Calculate the value of the output voltage reflection coefficient ( ) 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 .
– ___________
27 Calculate the value of the output SWR using Equation 2-13 and record the
value:
Equation 2-13:
– Output SWR ___________
M
P
1
P
2
-----
1 Γ
2
2
–
⎝⎠
⎛⎞
1 Γ
1
2
–
⎝⎠
⎛⎞
---------------------=
Γ
s
Γ
s
2 Γ
1
M 2 Γ
2
–()2 Γ
2
2 Γ
1
M–()
2
4 Γ
1
2
M Γ
2
2
–
⎝⎠
⎛⎞
M 1–()–±
2 Γ
1
2
M Γ
2
2
–
⎝⎠
⎛⎞
----------------------- ------------------------------------------ ---------------------------------------------- --------------------=
Γ
s
Γ
s
SWR
1 Γ
s
+()
1 Γ
s
–()
------------------=