Wavecom W61PC V7.5.0 - Manual (Page 89)

WAVECOM Decoder W61PC/LAN Manual V7.5 Analysis Tools  79
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 determines 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.