FLDIGI Users Manual 4.0
The decoder can detect and defeat a modest amount of CWI that is within the BW set by the BW factor. Increasing the CWI threshold increasing the sensitivity for this correction. The offending tones are punctured thereby rendering them null to the Viterbi decoder.
Enter the secondary text. This text will be sent during periods when your keyboard is inactive (between letters for slow typists). The default for this text will be your callsign when you have entered that in the Operator configuration tab.
Set the BW factor for the decoding prefilter. 2.0 should be adequate unless you are experiencing nearby continuous wave interference (CWI). You can enable and disable the prefilter with the checkbox. Please note that the filter requires additional cpu cycles. Older and slower cpu models might give better decoding with the filter disabled.
The DominoEX decoder can detect the presence of CWI within the passband set by the BW factor. Increasing the CWI threshold increases the sensitivity to such interference. When the interference is detected the associated data is culled using a technique called puncturing.
Thor has been specifically designed to be used with ARQ text transmissions. It is also an easy to use keyboard chat mode. Thor operations are described in Operating Thor.