Svantek SVAN 958A - Function #6 - Remote Setting of the User Filters

116
SVAN 958A User Manual
Note: There is not any succeeding transmission in the case when the Status Byte is equal to 0.
The transmission counter is a two-byte word denoting the number of the remaining bytes
to be transmitted. Its value is calculated from the formulae:
Transmission counter = 6+n * (4 * the number of the classes in the histogram)
where:
n the number of the transmitted histograms. For p = 1, 2, 3 or 4 only one histogram is transmitted (n =
1). For p between 5 and 8 the number of the transmitted histograms depends
on the measurement function and
• in the case of 1/1 OCTAVE analysis n is equal to the number of the analysis results
(NOct – cf. App. B) plus the number of the TOTAL values for this type of analysis (NOctTot);
• in the case of 1/3 OCTAVE analysis n is equal to the number of the analysis results
(NTer – cf. App. B) plus the number of the TOTAL values for this type of analysis (NTerTot);
NofClasses is a two-byte word denoting the number of classes in the histogram.
BottomClass is a two-byte word denoting the lower limit of the first class (*10 dB).
ClassWidth is a two-byte word denoting the width of the class (*10 dB).
Counter of the class is a four-byte word containing the number of the measurements belonging
to the current class.
Note: The bytes in the words are sent according to the scheme <LSByte>..<MSByte>.
A.7. FUNCTION #6 – REMOTE SETTING OF THE USER FILTERS
Function #6 enables one to send to the instrument the coefficients of the user filters.
In the available formats description of #6 functions the following symbols are used:
type - 0 for the vibration filters,
- 1 for the acoustic filters,
name, name
1
, name
2
- filter names given by the user,
v - real type value, expressed in [dB],
first - integer type value (number of the coefficient in the user filter),
pos - integer type value (Total value number),
avd - for the vibration filters: 0 - Acc, 1- Vel, 2 - Dil,
- for the acoustic filters this parameter is always equal to 0,
cal - the calibration coefficient given as the real number expressed in [dB].
chn - channel number (1, 2, 3 or 4).
#6 function formats are defined as follows:
#6,type,L;