Wavecom W-SPECTRA (Automatic Monitoring System) V1.1.0 - Manual (Page 213)

WAVECOM Monitoring System W-SPECTRA, W-SPEED Manual V1.1.0 Classifier – the Brain of W-SPECTRA 
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Samples taken after the classifier was started (select New Samples).
Sample Time Choose a sample time of 1.6 or 3.2 s. The probability of correct classification of
low symbol rate signals increases when the higher sample time is selected.
OFDM Mode If Full Analysis is selected the modulation format of the OFDM subcarriers is also
analyzed. If Partial Analysis is selected, the modulation format of the subcarri-
ers is not analyzed.
30 Bd CW-Morse
Protection Checking this box will introduce a feature to prevent the classifier from confusing
CW and FSK signals at the edges of the sampled input bandwidth.
The parameters can be set in the lower right corner of the W-SPECTRA GUI.
Set proper value for the classifier parameters.
Caveats
Even though the classifier has been carefully designed, the extreme complexity of classification requires
the user to be aware of a few caveats. Common sense and visual inspection, as well as prior monitoring
experience, are helpful when dealing with these issues.
Half-Duplex Signals
The classifier will only classify half-duplex or burst signals with difficulty. This is due to the nature of the
signal, which is only present for a relatively small fraction of the total sampling time.
Multi-channel Systems
The current version of the classifier will only classify a 12-channel PSK CIS-12 signal as a single, aggre-
gate signal – for all other multi-channel systems the classifier will classify each sub-channel as an individ-
ual signal.
MFSK
The current version of the classifier may indicate an incorrect number of tones for MFSK signals.