Bird-technologies 5015 Series-Manual Bedienungsanleitung PDF herunterladen (Seite 20)

8

Table 3 has two examples of uncertainty calculations.

The first is a 10 mW signal at room temperature. The

second is a 10 µW, 40 MHz signal at 50°C. Since this

measurement is at both low frequency and high tem

-

perature, the uncertainty will be increased. Note that

the RSS uncertainties are smaller than the values

from the rough estimate. This will always be the case.

Table 3 - Uncertainty Examples

Example 1

(10 mW,

Room Temp)

Example 2

(10 µW,

40 MHz, 50°C)

Error

Source

Percent

Uncert.

RSS

Term

Percent

Uncert.

RSS

Term

Cal. Uncert. 1.13 % 1.28 1.13 % 1.28

Freq. Resp. 3.42 % 11.70 3.42 % 11.70

Temp. Lin. 3.43 % 11.76 3.43 % 11.76

Other 0.5 % 0.25 1.6 % 2.56

Res. 0.005 % 0.00 0.5 % 0.25

Zero Set 0.00125 % 0.00 1.25 % 1.56

Noise 0.007 % 0.00 2 % 4.00

Sum Uncert. 24.99 33.11

RSS Uncert. 5.00 % 5.75 %

Quick Uncert. 5.01 % 16 %

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 30 31

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