4-70 WF1946B
4.7 Equivalent noise bandwidth
The density of noise generated by the WF1946B is as shown in the following figure "(a) Frequency
characteristics of noise generated by the WF1946B."
The rms values of (a) are equal to those of white noise in the figure "(b) Frequency characteristics of white
noise," that follows. This equivalent bandwidth (500 kHz) is called the equivalent noise bandwidth.
Noise density
[V/ Hz ]
(a) Frequency characteristics of noise
generated by the WF1946B
(b) Frequency characteristics of white
noise
Noise density
[V/ Hz ]
About 320 kHz
-3dB
500kHz
Frequency
Frequency
Effective values are equal
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