Agilent Technologies e4419b, e4418b Combined Standard Uncertainty ucy, Expanded Uncertainty kucy

Measurement Uncertainty Analysis – Instrument Accuracy Test

Measurement Introduction

Combined Standard Uncertainty uc(y):

There is no correlation associated with this measurement

Hence:

	uc2(y) =		[CTSE ⋅ u(TSE)]2, [cMV ⋅ u(MV)]2
	Table A-3 shows the combined standard uncertainty at all the power levels from 3uW
	(-25dBm) to 100mW (20dBm).
	Table A-3: Combined Standard Uncertainty.
Power	U(TSE)		U(MV)	uc(y)	k uc(y)
			(Converted)		k=2
3.16uW	0.0097uW		0.00946uW	0.0135uW	0.0271uW
10uW	0.009uW		0.00946uW	0.0131uW	0.0262uW
31.6uW	0.0095uW		0.00946uW	0.0134uW	0.0268uW
100uW	0.035uW		0.00946uW	0.0363uW	0.0725uW
316uW	0.03uW		0.042uW	0.0516uW	0.1032uW
1mW	0.00007mW	∑	0.000042mW	0.000082mW	0.00016mW
3.16mW	0.00022mW		0.000389mW	0.000447mW	0.00089mW
10mW	0.00069mW		0.000389mW	0.000792mW	0.00158mW
31.6mW	0.0022mW		0.00095mW	0.00239mW	0.00479mW
100mW	0.0092mW		0.00095mW	0.00924mW	0.01850mW

Expanded Uncertainty kuc(y):

The Expanded Uncertainty for each power level is given in the table above, using Agilent Technologies’s standard 95% confidence level gives a coverage factor of 2.

K = 2

Agilent E4416A/E4417A Service Guide A-9