Anritsu ML2480B Series - Page 37

Chapter 3 — Performance Verification 3-7 50 MHz Calibrator Power Level (All Models)
ML248xx, ML249xA MM PN: 13000-00164 Rev. K 3-13
The standard uncertainty of each source of uncertainty in Table 3-3 is calculated as follows:
V
comp
Unc
1
3
-------
0.00003 V
comp
× 0.000004 10V×+()
2 V
1
V
0
–()
4 R× EE× M×
---------------------------------------


××=
V
0
Unc
1
3
-------
2 0.00003 V
comp
× 0.0000004 10V×+()
2
×()
2– V
comp
V
0
–()
4 R× EE× M×
---------------------------------------


××=
V
1
Unc
1
3
-------
2 0.00003 V
comp
0.000004 10V×+×()
2
()
2 V
comp
V
1
–()
4 R× EE× M×()
--------------------------------------------


××=
R
Unc
1
3
-------
0.00006 R× 0.000002 1000()×+()
2V–
comp
V
1
V
0
–()V
0
2
V
1
2
+–
4 R
2
× EE× M×
-----------------------------------------------------------------------------



××=
EE
Unc
1
1
---
U
e
2
-------


2V–
comp
V
1
V
0
–()V
0
2
V
1
2
+–
4 R× EE
2
× M×
-----------------------------------------------------------------------------



××=
M
Unc
1
2
-------
2 Γ
s
×Γ
d
×()
2V–
comp
V
1
V
0
–()V
0
2
V
1
2
+–
4 R× EE× M
2
×
-----------------------------------------------------------------------------



××=
CR
Unc
1
1
---
0.1%()0.001W()×× 0.000001W==
Combined Uncertainty V
comp
Unc
2
V
1
Unc
2
V
0
Unc
2
R
Unc
2
EE
Unc
2
M
Unc
2
CR
Unc
2
++++++=
K 2=()2 Combined Uncertainty 1000 (95% level of confidence)××=