SVAN 948 USER MANUAL .
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Notice: The user can select the number of the currently active modes of the
measurement results presentation switching on ([
√
√√
√
]) or off ([ ]) the given mode in the DISPLAY MODES
sub-list of the DISPLAY list. Only one profile mode cannot be switched off. See Chapter 5 for the
details about the display modes control.
One Profile, 3 PROFILES and PLOT display modes are identical as for the VLM. The SPECTRUM
mode displays 1/1 OCTAVE analysis results (so-called spectrum) together with the TOTAL RMS value
measured with the HP weighting filter and the TOTAL values measured for filters, which are set in the
TOTAL VALUES sub-list of the DISPLAY SETUP list (path: MENU / DISPLAY / DISPLAY SETUP /
CHANNEL x / TOTAL VALUES).
The displays with the settings influencing the first TOTAL value presented in the SPECTRUM mode
The first TOTAL value is measured with:
• the HP weighting filter (in this case it is true RMS value in the whole band) or
• with the filter specified as VUSR1, VUSR2, VUSR3 or
• Any other filter, which name and the coefficients are sent to the unit by the interface.
The coefficients of the user defined filters are set in the VIBR. FILTERS sub-list of the SETUP list
(path: MENU / SETUP / USER FILTERS / VIBR. FILTERS). It is also possible to send the coefficients of the
filters used in the calculations by means of the serial interface from a PC (a special function is developed
for this purpose – for details see App. A). The names of the filters introduced to the unit in mentioned
above way, as well as the values of the coefficients, can be examined by means of the VIEW window from
the VIBR. FILTERS sub-list of the SETUP list (path: MENU / SETUP / USER FILTERS / VIBR. FILTERS /
VIEW).
The displays showing the possibility of the verification of the user filter names and the values of the
coefficients taken to the calculation of the TOTAL values presented in the SPECTRUM mode
The second TOTAL value is measured with the weighting filter:
• selected in the second channel (CH) or
• specified as VUSR1, VUSR2, VUSR3 or
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