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Briiii& K_.
0 dB r-Fundamental level
-
lOdB
-
20 dB
-
30dB
-
40dB
-
50 dB
QP 1102
171407
Fig.7.1.b.
Frequency analysis of the vibrations of a small electric motor
(Lin. sweep)
frequency marker function of the 2010 connected to control the event
marker of the recorder. The resulting recording, shown in Fig.7.1b, gives the
enlarged section with the frequency calibration at the top of the paper
which enables very accurate frequency determination of the peaks.
Vibrating Structure
Level Recorder 2305
~-~·
Preamplifier
2626
Heterodyne Analyzer 2010
.
0
l!!!!i!!!!!!!!l!
- ,--~~
I
I
frequency marker control
Fig.7.2. Set-up for recording Vibration spectra
171111
75
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