Audio Analyzer HP 3561A
Physikfan, Fri Jul 07 2017, 11:07AM
With the help of a microphone and this analyzer, I would like to record the noise of a running three-phase motor connected to a frequency converter.
The internal calibration signal (4 kHz rectangle) can be seen in the lower picture,
the upper picture shows the corresponding Fourier spectrum.
Re:
Audio Analyzer HP 3561A
Sulaiman, Fri Jul 07 2017, 03:31PM
I think that you would learn a lot more if you
. use an ultrasonic probe or accelerometer
. analyze the voltage (e.g.
) and current (e.g.
)
a simple ferrite ring current transformer will reveal all ....
Re:
Audio Analyzer HP 3561A
Physikfan, Fri Jul 07 2017, 08:24PM
For the current measurements I will use the Tektronix P6042 current probe:
bandwidth DC to 50 MHz, risetime 7ns
Re: Audio Analyzer HP 3561A
Sulaiman, Sat Jul 08 2017, 03:50PM
A blast from my past .. '70's ... nice bit of kit.
From memory, it needs de-gaussing frequently.
Re:
Audio Analyzer HP 3561A
Physikfan, Sun Jul 09 2017, 11:21AM
My first experiments with the HP3561A I have done with a 15 $ microphone from Renkforce (100 Hz - 10 kHz).
The vowels A, E, I, O, U (logarithmic scale on the ordinate, abscissa frequency 0 Hz to 2 kHz).
A:
E:
I:
O:
U:
Regards
Physikfan
Re: Audio Analyzer HP 3561A
Physikfan, Wed Jul 12 2017, 03:26AM
hello Sulaiman
In addition, I have seen such a working part (HP 3561A) at a flea market for around 400 euros.
VG
Physikfan