Wavecom W74PC V8.7.0 - Manual (Page 100)

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Analysis Tools WAVECOM Decoder W74PC, W-PCI/e, W-CODE, W-CLOUD Manual V8.7.0
Steps:
 After starting the FSK code check the frequency shift, center frequency and the baud rate are de-
termined. The values of these parameters are displayed in the appropriate fields after the meas-
urement has completed.
 The software then proceeds with code and system analysis. The incoming bit stream is tested and
compared against known modes.
 The name of each identified system is displayed in the output window. An identified system may
be immediately started by double-clicking the system in the output window - for instance double-
clicking ACARS in the figure above will interrupt FSK code checking and immediately start ACARS.
 The Hits-Checks will show you how often during checking a mode was successfully determined. If
multiple modes are listed this will indicate which mode should be tried.
 If a mode is uniquely identified, the software will switch to the identified mode and decoding is ini-
tiated with the measured values of mode, baud rate, shift, and center frequency.
 If two or more different systems are identified or if too many transmission errors occur, an auto-
matic switch to a mode will not take place.
Noise Gate Mode…
The Noise Gate Mode can be selected by Options | Noise Gate Mode… or by double-clicking the Noise
Gate Mode field in the Status Bar.
 In Enabled mode, a Noise Gate is used. This is necessary as this kind of signal is not continuous.
The noise gate examines the input signal and tries to determine if a valid signal is available which
can be analyzed, or if the input consists only of noise.
 In Disabled mode the Noise Gate is switched off.