2Performance Tests
56 E4416A/E4417A Power Meters Service Guide
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 ___________
28 Verify that the output SWR is not greater than the maximum value shown in
the following table:
SWR
1 Γ
s
+()
1 Γ
s
–()
-----------------------=
The and values are measuredfor the thermistor mount (478A) using the
network analyzer. For clarification, above is measured at 200 ohm while is
measured at 100 Ω.
Ta bl e 2 - 8 Output SWR Result
Max Actual Result
1.06
*
* For instruments with the 50 MHz 1 mW output (power ref) connector mounted on the front panel.
__________________
1.08
†
† For instruments with the 50 MHz 1 mW output (power ref) connector mounted on the rear panel.
This applies to models E4416A and E4417A with Option 003.
__________________
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