kopia lustrzana https://github.com/jamescoxon/dl-fldigi
52 wiersze
1.5 KiB
Plaintext
52 wiersze
1.5 KiB
Plaintext
/**
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\page throb_page Throb
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\tableofcontents
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The THROB family of modes use two tones at a time. These tones are also
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amplitude modulated and can be a single tone for some symbols.
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<br>
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The mode has no Forward Error Correction, and is difficult to
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tune. It is fairly sensitive and moderately robust. Keyboard-to-keyboard QSOs
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are reasonably fast.
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<br>
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Tuning must be very accurate, and the software will not tolerate
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differences between transmit and receive frequency.
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<br>
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The amplitude modulation component of THROB is a raised cosine AM modulation
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of each symbol. This combined with two tones transmitted at the same time,
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means that a very linear transmitter is required. It also gives the mode its
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very unique sound. You will never mistake Throb for any other mode.
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<br>
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For THROB, nine tones are used, spaced 8 or 16 Hz. For THROBX, 11 tones
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are used, spaced 7.8125 or 15.625 Hz.
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<br>
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Fldigi supports the following:
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<br>
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\section throb_baud_table Throb baud rates and tone spacings
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<br>
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Mode | Symbol Rate | Typing Speed | Bandwidth
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:------:|:-----------:|:----------------:|:----------------:
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THROB1 | 1.0 baud | 1.0 cps (10 wpm) | 72 Hz
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THROB2 | 2.0 baud | 2.0 cps (20 wpm) | 72 Hz
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THROB4 | 4.0 baud | 4.0 cps (40 wpm) | 144 Hz
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THROBX1 | 1.0 baud | 1.0 cps (10 wpm) | 94 Hz
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THROBX2 | 2.0 baud | 2.0 cps (20 wpm) | 94 Hz
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THROBX4 | 4.0 baud | 4.0 cps (40 wpm) | 188 Hz
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<br>
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\ref throb_page "Return to Top of Page"
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<br>
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\ref main_page "Return to Main Page"
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*/
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