DIGITAL & DATA MODES.

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Presentation transcript:

DIGITAL & DATA MODES

Digital / Data Modes Fldigi FSK WinPack PSK USB TNC/Sound Card Audio IN/OUT USB TNC/Sound Card

Digital / Data Modes 219 to 220 MHz, also others Many different “flavors” “parity bit” extra bit detects errors BER = Bit Error Rate GPS can provide APRS

PSK31 Low Data Rate (Keyboard) continuous whistle with a slight warble Sound files from http://www.kb9ukd.com/digital/

MFSK Shifts Audio Frequency between a number of different tones Low data rate 64 bps Sounds like a crazy bird Sound files from http://www.kb9ukd.com/digital/

Packet “High” Data Rate Checksum Header (Destination Call Sign) Automatic Repeat if error detected How it sounds: Sound files from http://www.kb9ukd.com/digital/