FLDIGI Users Manual  3.21
DominoEX

The modem code for dominoEX uses a wide band multiple frequency detector that can lock on and detect the incoming signal even when badly mistuned. Frequency domain oversampling is used to allow proper tone detection without the need for AFC. The AFC control does not alter the decoder in any way.

The waterfall and digiscope will appear as:

dominoex-1.jpg
DominoEX

The text displayed in the status area is the secondary text being sent by the transmitting station. When the keyboard buffer is empty the dominoEX modem transmits text from the secondary text buffer. Your secondary text buffer can be edited on the DominoEX configuration tab.

The digiscope display represents the tone pairs moving through the tone filters. You can also use an alternate digiscope display (left click on the digiscope display area).

dominoex-1a.png
DominoEX

In this display mode the red line represents the center of the multiple tone bins that are in the detector. The dots will be blurry if the AFC is not locked on and become very distinct when AFC lock has been achieved. The tone dots will move from bottom to top (opposite the direction of the waterfall).

This is the same signal mistuned:

dominoex-1a.png
DominoEX Mistuned

and with the signal badly mistuned:

dominoex-3.png
DominoEX Mistuned

See DominoEX Configuration.


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