Multi Frequency Shift Keying (MFSK)

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Multiple Frequency-Shift Keying (MFSK)
MFSK 8 thmb.jpg
Frequencies 3 MHz,30 MHz
Frequency Range 3 MHz - 30 MHz
Mode USB
Modulation MFSK
ACF
Emission Designator
Bandwidth 154 Hz,218 Hz,316 Hz,330 Hz,435 Hz,630 Hz
Location Worldwide
Short Description MFSK is a family of multi-frequency shift keying digital transmission modes. MFSK-8 and MFSK-16 are two well-known amateur radio modes.
I/Q Raw Recording
Audio Sample

MFSKMultiple Frequency Shift-Keying is a family of multi-frequency shift keying digital transmission modes. MFSKMultiple Frequency Shift-Keying-8 and MFSKMultiple Frequency Shift-Keying-16 are two well-known amateur radio modes. MFSK16 and MFSK8 were developed by Murray ZL1BPU and Nino IZ8BLY in 1999.

MFSKMultiple Frequency Shift-Keying-8 uses a set of 8 tones with the equal distance of 15.625 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz)., MFSKMultiple Frequency Shift-Keying-16 a set of 16 tones with the equal distance of 7.8125 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).. The baudBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. rate of MFSKMultiple Frequency Shift-Keying-8 is 7.81 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. and that of MFSKMultiple Frequency Shift-Keying-16 is 15.625 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second..


Mode Samples[edit]

MFSKMultiple Frequency Shift-Keying 4

MFSK 4.png
MFSKMultiple Frequency Shift-Keying 8

MFSK 8.jpg
MFSKMultiple Frequency Shift-Keying 11

MFSK 11.jpg
MFSKMultiple Frequency Shift-Keying 16

MFSK 16.jpg
MFSKMultiple Frequency Shift-Keying 22

MFSK 22.jpg
MFSKMultiple Frequency Shift-Keying 31

MFSK 31.jpg
MFSKMultiple Frequency Shift-Keying 32

MFSK 32.jpg
MFSKMultiple Frequency Shift-Keying 64

MFSK 64.jpg
MFSKMultiple Frequency Shift-Keying 128

MFSK 128.jpg

Frequencies[edit]

This mode is utilized during the tests run by a couple of stations every weekend. See the Shortwave RadioGram website for the schedule.

Decoding Software[edit]

Hobby Level Software
Professional Software

Additional Links[edit]

Additional Images[edit]