User manual

106
1/12 Octave + Tolerance
1/12 Octave - Fast Frequency Response
Measurement
The XL2 provides fast and accurate frequency response mea-
surement within one second using pink noise. For this pur-
pose, the Minirator MR-PRO generates the test signal “Fast
Pink Noise” tailored to this application.
Test Signal
The test signal “Fast Pink Noise” is not “random”; it contains
an absolutely flat spectrum within the cycle time. The frequen-
cy resolution of the test signal is limited to 1 / cycle time; there-
fore you can choose between two different test signals:
Minirator MR-PRO
Test Signal
XL2 Frequency
Resolution
XL2
Measurement
Duration
File -> Signals ->
Fastpnk1
1/1 Octave
1/3 Octave
1 second
File -> Signals ->
Fastpnk4
1/6 Octave
1/12 Octave
4 seconds
Measurement in 1/3 Octave Resolution
Select the test signal • Fastpnk1 on the Minirator MR-PRO.
Connect the MR-PRO to the input of the device under test.•
Take the XL2 and select the function • 1/12Oct.
Select the one-third octave band frequency resolution.•
Select the measurement parameter • EQ, the mode “Single”
and set the measurement duration to one second.
For higher frequency resolutions use the test signal • Fast-
pnk4 and a measurement duration of four seconds.
Start the measurement •
.
 You have successfully completed the measurement.