Measurement Uncertainty Analysis – Power Reference Level Test
Measurement Introduction
Consider the model below:
P |
An estimate of the moduli of Pd and Ps are each less than a specified value. Ps and Pd each lie within a circle of radius P. Assuming Pd and Ps have equal probability of lying anywhere within the circle the standard uncertainty of Mismatch becomes
( ) ±maxPs ⋅ maxPd u Ms =
2
Ps is the reflection coefficient of the source, which is specified as less than 1.05.
VSWR < 1.05
The reference is designed to have a VSWR of less than 1.05.
VSWR < 1.05 |
|
Hence, |
|
Ps(max) = Pd(max) = | = |
VSWR + 1 | 1.05 + 1 |
Agilent E4416A/E4417A Service Guide |
