Calculating M; Eas Ureme Nt Un Certa Inties - HP 435B Operating And Service Manual

O p eration
Mo d el 435 Β
3-1 2
CA
L
C
UL
ATI
N
G
ME
AS
UREMEN
T
UN
C ER
TAI
N
TY
3 .
Calculate t he
M
eas ure me nt Uncertainty in dB .
MU = 10 [1οg10 (ρ '-) Ι dB
ο
0.871
MU, = 10
1
log
(1 .138)]
1
and
10 [log (
1
) ]
= 10 [0 .056 1 and
10 [-0 .060 1
= +0 .56 dB
and -0 .60 dB
MU, = 10 [ log
(1-075)]
1
and 10 [ log
(0 .127)]
1
= 10 [0 .031] and
10 [-0 .033 1
= +0.31 dB
and -0 .33 dB
F
igure 3-6. Calculating
M
easurement Uncertainties (2 of 2)