Wavecom W61PC V7.5.0 - Manual (Page 86)

76  Analysis Tools WAVECOM Decoder W61PC/LAN Manual V7.5
Steps:
 After starting the FSK code check the frequency shift, center frequency and baud rate are deter-
mined. The values of these parameters are displayed in the appropriate fields after measurement
has finished.
 The software then proceeds with code and system analysis. The incoming bit stream is tested
against known modes. For some modes using a high interleaving depth (e.g. RUM-FEC) large
quantities of input data are required. These modes therefore require longer to test and are tested
last.
 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 BAUDOT ITA-2 in the figure above will interrupt FSK code checking and immediately start
BAUDOT ITA-2.
 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.
 Some modes are very difficult to distinguish, especially when the system is in idle mode. The de-
coded text including text representations of the special characters IDLE ALFA, IDLE BETA and RQ
are important additional classification aids in determining the mode under examination.
 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.
Fast Scan / Full Scan
The Scan Mode can be selected by Options | Scan Mode… or by double-clicking the Scan Mode field in
the Status Bar.