Bird Technologies 5015 Series-Manual User Manual
Page 20
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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 %