Svantek SVAN 979 - Function #5 - Statistical Analysis Results Read - out

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SVAN 979 User Manual - Appendixes
Note: The "\" character is treated as the file name of the catalogue and must be sent
to the instrument.
All data words are sent as <LSB>,<MSB>.
When an error is detected in the file specification or data, the instrument will send:
#4,?;
A.5. FUNCTION #5 – STATISTICAL ANALYSIS RESULTS READ-OUT
#5 function enables one to read out the statistical analysis results.
#5 function format is defined as follows:
#5,p;
where:
p the source of the statistical analysis results, for p = 1, 2 or 3 it is the corresponding profile and
for p = 0 - the results obtained during 1/1 OCTAVE or 1/3 OCTAVE analysis.
The device responds, sending the current classes of the statistics in the following format:
#5,p;<Status Byte> <LSB of the transmission counter> <MSB of the transmission counter>
<NofClasses><BottomClass><ClassWidth><Counter of the class> (...) <Counter of the class>
Status Byte gives the information about the current state of the instrument.
b7
b6
b5
b4
b3
b2
b1
b0
where:
b7 = 0 means that "overload does not happen"
= 1 means that “overload appeared”
b6 = reserved
b5 = 0 the instantaneous current result (RUN State)
= 1 the final result (STOP State)
b4 = 1 always 1
b3..0 = reserved
Note: There is not any succeeding transmission in case the Status Byte is equal to zero.
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 statistics)
where:
n the number of the transmitted statistics. For p = 1, 2 or 3 only one statistic is transmitted (n = 1). For
p = 0 the number of the transmitted statistics depends on the measurement function and
1. in 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);
2. in 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 statistic.