BRUEL & KJAER 4292 Instructions And Applications page 32

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Briiel & Kjcar
Copenhagen
Measuring
Max. sens.
ampJillll!L_
~~~!~'itbr
oF
- 2il~t~ t=J
~WtL_
-.Uel
•u.r
&
K)mf BrUel
&
kjc.r
CCDDCCCDOOOODODDDDODDOODDDDCDOODDDCOO
____2L.dB RecUflef:....B.M.L lower Lia Freq.: ___l___Hz Wr. SpMd: 31 5 rnrnfs.ac .
Paper
Speed: 0 .3 rttm/wc.
16-[.0S
130
Fig.5.14. Third octave analysis showing the noise produced by the pream-
plifier over the 20Hz to 40kHz range, for maximum preampli-
fier sensitivity with the AMPL /TUDE control set to "Off"
30