1. MFSK and Using Olivia 8/500 on Fldigi Plus Some

2. FSK & MFSK FSK – Frequency Shift Keying
One Tone at One Frequency
Either On or Off
MFSK – Multiple Frequency Shift Keying
One Tone at One of Multiple Frequencies
Tone Sent at Only One Frequency per Transmission

3. Olivia 8/500
8 frequencies 500 Hz signal width 62.5 Hz / frequency 8 = 23 each transmission contains 3 bits of information Possible values: [0 0 0] [0 0 1] [0 1 0] [0 1 1] [1 0 0] [1 0 1] [1 1 0] [1 1 1] Each of the 8 frequencies is associated with one of the values - only one frequency transmits at a time - which frequency determines the value. Transmissions are analyzed in 64 length blocks – each column in the block is a ASCII character - 3 bits over 64 columns represent 3 ASCII characters. As number of frequencies increases, speed of transmission increases. As signal width increases, speed of transmission decreases

4. Fldigi Source Code: https://sourceforge.net/projects/fldigi/
Center Frequency vs. Dial Frequency
Contact Call Sign
Macros
Logging and Timing

5. Digital Band Plans
Informal Band Plans Good for Finding and Figuring Out Digital Modes Can Add Frequencies – For Example for Nets

6. JT65-HF
Source Code: Formal Mode – only one special form is received and transmitted Every Transmission is of the same Length in Time See for more Information