B&K 2250 Light, User Manual, Page: 110 / 208

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2250 Light – User Manual
All markers can be controlled by the stylus in the Profile display.
You can set a Pre-marker Time between 0 and 5 seconds. This will start markers 1, 2 or
3 the set number of pre-marker seconds before the point where the Back-erase pushbutton
or the Manual Event pushbuttons are pressed. See section 11.3.2.
10) If you have a license for Signal Recording Option BZ-7226, you can define the settings for
recording the signal while logging under the Signal Recording parameters. See Chapter 12
for more information.
11) If you have a license for Tone Assessment Option BZ-7231, you can define its settings
under the Tone Assessment parameters. See Chapter 13 for more information.
11.2 Controlling the Measurement
The measurement is controlled in the same way you would control a normal sound level meter
measurement, using
Start/Pause , Continue , Reset and Save pushbuttons, see Chapter 3 for
more details.
If you have set the Charge Injection Calibration parameter to On , then CIC is performed at the
start of the measurement and at the end of the measurement. An Exclude marker is set on the
logging profile at the point where the CIC is being performed. The update of the
Total
parameters is stopped while the CIC is being performed. You can see the results of the CIC
under
Total parameters, CIC Result 1 and CIC Result 2 .
Recording the Signal
If you have a license for Signal Recording Option BZ-7226, you can record the input signal
during the measurement by pressing the
Manual Event 1 or Manual Event 2
pushbutton (adds a Manual Event marker) or the Back-erase pushbutton (adds an Exclude
marker), or you can record the signal throughout the entire measurement – depending on the
Signal Recording setting in the Setup . Details in Chapter 12.
11.3 Displaying the Results
The Logging measurement screen (or Profile View) includes three tabs at the bottom: Profile ,
Spectrum and Broadband View (the Logging SLM includes the tabs: Profile , Broadband and
XL View ). The tabs allow you to choose different ways of displaying the measurement results.
All but the Profile tab have been covered previously in Chapters 3 and 10, however a quick
recap is provided below.
The Broadband view shows an instantaneous L
AF
readout, with associated bar graph and a
number of measurement parameters. (The first measurement parameter is displayed in a larger
font size for better readability.)
The XL View increases the size of the first parameter readout to a 4 digit, full-screen display
(including decimal point).
The Spectrum view shows two different spectra parameters being measured simultaneously.