Digital data modes
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DIGITAL & DATA MODES. Digital / Data Modes. Fldigi WinPack. FSK PSK. 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.

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DIGITAL & DATA MODES

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Digital data modes

DIGITAL & DATA MODES


Digital data modes

Digital / Data Modes

Fldigi

WinPack

FSK

PSK

Audio IN/OUT

USB

TNC/Sound Card


Digital data modes

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


Digital data modes

PSK31

  • Low Data Rate (Keyboard)

  • continuous whistle with a slight warble

Sound files from http://www.kb9ukd.com/digital/


Digital data modes

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/


Digital data modes

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/


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