HP 436A Operating And Service Manual page 54

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Model 436A
CALCULATING MEASUREMENT UNCERTAINTY
3. Calculate the Measurement Uncertainty in dB.
MU1
=
10
~og(l.1138)]
=
10 [0.056)
=
+0.56 dB
=
10 (0.031)
=
+0.31 dB
MU
=
10
~og10(:~)]
p
dB for _l_>l
Po
=
10
~og(~~:~)]
dB
p
=
10 [log (10P 1 ) - log (lOPo)] dB for _1_
<
1
Po
and
10 [log (10) (0.870) - log (10) (1))
and 10 [log ( 8. 70) - log (10)]
and 10 (0.94-1)
and 10 [- 0.060)
and -0.60dB
and 10 [log (10) (0.928) - log (10) (1))
and
10 [log (9.28) - log (10))
and 10 [0.968-1)
and 10 [- 0.032)
and
-0.32 dB
Figure 3-9. Calculating Measurement Uncertainties (2 of 2)
Operation
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