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.MFSK16 and MFSK8 are powerful modes MFSK (Multi Frequency Shift Keying) modes designed specifically for DX. They use a convolutional FEC (Forward Error Correction) coding and an interleaver, which disperse the symbols over a long period of time, in a way that counters the effects of noise and multi-path that affect reception. Bits are sent on a carrier chosen among 16 (MFSK16) or 32 (MFSK8). The minimum ratio Signal-to-Noise ratio is about - 13.5 dB for MFSK16 and -15.5 dB for MFSK8.

Created by : Nino Porcino IZ8BLY and Murray Greenman ZL1BPU
Description :
Baud rate : 15.625 for MFSK16 et 7.8125 for MFSK8 Speed : 42 wpm (average) (62.5 bits/sec) for MFSK16 and 26 wpm (average) (39.06 bits/sec) for MFSK8 Modulation : FSK 16 tones (4 bits) for MFSK16 and 32 tones (5 bits) for MFSK8
Reception mode : only one side (USB or LSB), USB is recommended
Character set : ASCII characters + almost all ANSI extended characters + an error reset character ( Varicode characters)
Shape of pulse : rectangular  Space between tones : 15.625 Hz for MFSK16 et 7.8125 Hz for MFSK8,
Bandwidth : 316 Hz, Demodulation : non-coherent, Synchronization : automatic using the signal
Convolution code : R(Rate)=1/2, K (Constraint length)=7 with Viterbi type decoder Interleaving : yes (for example, spreading of 120 bits for MFSK16)
Drift tolerance : 10 20 Hz/mn for MFSK16 and 4 to 7 Hz/mn according to signal-to-noise ratio, Pmean/Ppeak : 1
Lowest S/N : -13.5 dB for MFSK16 and -15.5 dB for MFSK8

+Very good sensitvity
-FEC is pretty strong
-Resists ionspheric effects
+Used some
-High Duty Cycle



Mode Menu
MFSK
Mode Audio Sample
FFT Window Screenshot
[MFSK PIC MODE]
SubMode of MFSK is MFSK PIC MODE
mfsk