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Introduction to Digital Modes Creede Lambard WA7KPK INTRODUCTION TO DIGITAL MODES Creede Lambard, WA7KPK Mercury Northwest November 2012
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Introduction to Digital Modes Creede Lambard WA7KPK What is a digital mode?
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Introduction to Digital Modes Creede Lambard WA7KPK What is a digital mode? ● Any amateur radio mode that can or must be received, presented, encoded and transmitted by the use of a computer or other dedicated digital device.
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Introduction to Digital Modes Creede Lambard WA7KPK The first digital mode
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Introduction to Digital Modes Creede Lambard WA7KPK The first digital mode ● Morse code!
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Introduction to Digital Modes Creede Lambard WA7KPK The first digital mode ● Morse code!
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Introduction to Digital Modes Creede Lambard WA7KPK The first digital mode ● Morse code ● CW
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Introduction to Digital Modes Creede Lambard WA7KPK The first digital mode ● Morse code ● CW ● Frequency-Shift Keying (FSK)
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Introduction to Digital Modes Creede Lambard WA7KPK Radioteletype (RTTY)
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Introduction to Digital Modes Creede Lambard WA7KPK Radioteletype (RTTY) ● Developed when AM was king
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Introduction to Digital Modes Creede Lambard WA7KPK Radioteletype (RTTY) ● Developed when AM was king ● War surplus Teletype machines
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Introduction to Digital Modes Creede Lambard WA7KPK Radioteletype (RTTY) ● Developed when AM was king ● War surplus Teletype machines ● Uses FSK on both sidebands
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Introduction to Digital Modes Creede Lambard WA7KPK Radioteletype (RTTY) ● Developed when AM was king ● War surplus Teletype machines ● Uses FSK on both sidebands ● Uses Baudot encoding (5 bits)
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Introduction to Digital Modes Creede Lambard WA7KPK Packet Radio
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Introduction to Digital Modes Creede Lambard WA7KPK Packet Radio ● Sort of an “internet via amateur radio”
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Introduction to Digital Modes Creede Lambard WA7KPK Packet Radio ● Sort of an “internet via amateur radio” ● First became feasible in 1980 when the FCC allowed transmission of ASCII via ham radio
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Introduction to Digital Modes Creede Lambard WA7KPK Packet Radio ● Sort of an “internet via amateur radio” ● First became feasible in 1980 when the FCC allowed transmission of ASCII via ham radio ● Primarily uses dedicated equipment for communication (TNC)
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Introduction to Digital Modes Creede Lambard WA7KPK Packet Radio ● Sort of an “internet via amateur radio” ● First became feasible in 1980 when the FCC allowed transmission of ASCII via ham radio ● Primarily uses dedicated equipment for communication (TNC) ● Does error correcting
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Introduction to Digital Modes Creede Lambard WA7KPK Personal Computers & Sound Cards
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Introduction to Digital Modes Creede Lambard WA7KPK Personal Computers & Sound Cards ● RTTY modem software developed for PC
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Introduction to Digital Modes Creede Lambard WA7KPK Personal Computers & Sound Cards ● RTTY modem software developed for PC ● PC software emulating a TNC is available
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Introduction to Digital Modes Creede Lambard WA7KPK Personal Computers & Sound Cards ● RTTY modem software developed for PC ● PC software emulating a TNC is available ● Research on creating narrow-bandwidth PC-based modes
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Introduction to Digital Modes Creede Lambard WA7KPK Personal Computers & Sound Cards ● RTTY modem software developed for PC ● PC software emulating a TNC is available ● Research on creating narrow-bandwidth PC-based modes ● FCC allows ASCII transmission
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Introduction to Digital Modes Creede Lambard WA7KPK Personal Computers & Sound Cards ● RTTY modem software developed for PC ● PC software emulating a TNC is available ● Research on creating narrow-bandwidth PC-based modes ● FCC allows ASCII transmission ● FCC allows other encodings provided they are published into the public domain
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Introduction to Digital Modes Creede Lambard WA7KPK
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Introduction to Digital Modes Creede Lambard WA7KPK
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Introduction to Digital Modes Creede Lambard WA7KPK
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Introduction to Digital Modes Creede Lambard WA7KPK PSK-31
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Introduction to Digital Modes Creede Lambard WA7KPK PSK-31 ● Created by Peter Martinez (G3PLX) in 1998
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Introduction to Digital Modes Creede Lambard WA7KPK PSK-31 ● Created by Peter Martinez (G3PLX) in 1998 ● Stands for “phase shift keying”
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Introduction to Digital Modes Creede Lambard WA7KPK PSK-31 ● Created by Peter Martinez (G3PLX) in 1998 ● Stands for “phase shift keying” ● Bandwidth: 31 hz
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Introduction to Digital Modes Creede Lambard WA7KPK PSK-31 ● Created by Peter Martinez (G3PLX) in 1998 ● Stands for “phase shift keying” ● Bandwidth: 31 hz ● 80-90 QSOs in the width of a typical SSB signal
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Introduction to Digital Modes Creede Lambard WA7KPK PSK-31
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Introduction to Digital Modes Creede Lambard WA7KPK PSK-31 ● Created by Peter Martinez (G3PLX) in 1998 ● Stands for “phase shift keying” ● Bandwidth: 31 hz ● 80-90 QSOs in the width of a typical SSB signal ● Does not do error correcting
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Introduction to Digital Modes Creede Lambard WA7KPK Other Digital Modes
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Introduction to Digital Modes Creede Lambard WA7KPK Other Digital Modes ● Drinking from the firehose!
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Introduction to Digital Modes Creede Lambard WA7KPK Other Digital Modes ● Olivia MFSK
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Introduction to Digital Modes Creede Lambard WA7KPK Other Digital Modes ● Olivia MFSK ● Developed by Pavel Jalocha (SP9VRC), 2003 ● Named after his daughter
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Introduction to Digital Modes Creede Lambard WA7KPK Other Digital Modes ● Olivia MFSK
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Introduction to Digital Modes Creede Lambard WA7KPK Other Digital Modes ● Olivia MFSK ● Developed by Pavel Jalocha (SP9VRC), 2003 ● Named after his daughter ● FEC enabled
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Introduction to Digital Modes Creede Lambard WA7KPK Other Digital Modes ● Olivia MFSK ● Developed by Pavel Jalocha (SP9VRC), 2003 ● Named after his daughter ● FEC enabled ● Can be decoded even when below the noise floor
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Introduction to Digital Modes Creede Lambard WA7KPK Other Digital Modes ● MT63
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Introduction to Digital Modes Creede Lambard WA7KPK Other Digital Modes ● MT63 ● Also developed by Jalocha ● Similar in some ways to Olivia
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Introduction to Digital Modes Creede Lambard WA7KPK Other Digital Modes ● MT63 ● Also developed by Jalocha ● Similar in some ways to Olivia ● Used for emergency communications due to robust FEC
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Introduction to Digital Modes Creede Lambard WA7KPK Other Digital Modes ● Several other modes ● DominoEX ● Thor ● Throb ● Hellschreiber
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Introduction to Digital Modes Creede Lambard WA7KPK JT65
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Introduction to Digital Modes Creede Lambard WA7KPK JT65 ● “Music Box” mode
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Introduction to Digital Modes Creede Lambard WA7KPK JT65 ● Developed by Joe Taylor, K1JT
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Introduction to Digital Modes Creede Lambard WA7KPK JT65 ● Developed by Joe Taylor, K1JT ● Also chair of astrophysics department at Princeton
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Introduction to Digital Modes Creede Lambard WA7KPK JT65 ● Developed by Joe Taylor, K1JT ● Also chair of astrophysics department at Princeton ● Also Nobel Prize laureate in physics
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Introduction to Digital Modes Creede Lambard WA7KPK JT65 ● Developed by Joe Taylor, K1JT ● Also chair of astrophysics department at Princeton ● Also Nobel Prize laureate in physics ● Based in meteor scatter and EME
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Introduction to Digital Modes Creede Lambard WA7KPK JT65 ● Developed by Joe Taylor, K1JT ● Also chair of astrophysics department at Princeton ● Also Nobel Prize laureate in physics ● Based in meteor scatter and EME ● Not a keyboard-to-keyboard mode ● Based on the minimal information necessary to conduct a QSO
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Introduction to Digital Modes Creede Lambard WA7KPK JT65
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Introduction to Digital Modes Creede Lambard WA7KPK A typical JT65 QSO
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Introduction to Digital Modes Creede Lambard WA7KPK A typical JT65 QSO ● CQ WA7KPK CN87 ● (each transmission is one minute long) ● (CQ was sent on an even minute)
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Introduction to Digital Modes Creede Lambard WA7KPK A typical JT65 QSO ● CQ WA7KPK CN87 ● WA7KPK JH1KYA PM95 ● (reply was sent on an odd minute)
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Introduction to Digital Modes Creede Lambard WA7KPK A typical JT65 QSO ● CQ WA7KPK CN87 ● WA7KPK JH1KYA PM95 ● JH1KYA WA7KPK -15
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Introduction to Digital Modes Creede Lambard WA7KPK A typical JT65 QSO ● CQ WA7KPK CN87 ● WA7KPK JH1KYA PM95 ● JH1KYA WA7KPK -15 ● WA7KPK JH1KYA R-10
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Introduction to Digital Modes Creede Lambard WA7KPK A typical JT65 QSO ● CQ WA7KPK CN87 ● WA7KPK JH1KYA PM95 ● JH1KYA WA7KPK -15 ● WA7KPK JH1KYA R-10 ● JH1KYA WA7KPK RRR
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Introduction to Digital Modes Creede Lambard WA7KPK A typical JT65 QSO ● CQ WA7KPK CN87 ● WA7KPK JH1KYA PM95 ● JH1KYA WA7KPK -15 ● WA7KPK JH1KYA R-10 ● JH1KYA WA7KPK RRR ● WA7KPK JH1KYA 73
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Introduction to Digital Modes Creede Lambard WA7KPK A typical JT65 QSO ● CQ WA7KPK CN87 ● WA7KPK JH1KYA PM95 ● JH1KYA WA7KPK -15 ● WA7KPK JH1KYA R-10 ● JH1KYA WA7KPK RRR ● WA7KPK JH1KYA 73 ● 30W DPL TU 73
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Introduction to Digital Modes Creede Lambard WA7KPK Hardware requirements
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Introduction to Digital Modes Creede Lambard WA7KPK Hardware requirements ● Transceiver (of course)
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Introduction to Digital Modes Creede Lambard WA7KPK Hardware requirements ● Transceiver (of course) ● Computer (the faster the better, especially for higher-latency modes like JT65 or Olivia)
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Introduction to Digital Modes Creede Lambard WA7KPK Hardware requirements ● Transceiver (of course) ● Computer (the faster the better, especially for higher-latency modes like JT65 or Olivia) ● Sound card or dedicated USB device (e.g. Signalink or Rigblaster)
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Introduction to Digital Modes Creede Lambard WA7KPK Hardware requirements ● Transceiver (of course) ● Computer (the faster the better, especially for higher-latency modes like JT65 or Olivia) ● Sound card or dedicated USB device (e.g. Signalink or Rigblaster) ● Cables to connect radio to computer
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Introduction to Digital Modes Creede Lambard WA7KPK Software
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Introduction to Digital Modes Creede Lambard WA7KPK Software ● Ham Radio Deluxe ● Very comprehensive (read: steep learning curve) ● Includes most digital modes ● Current version (5.0) is donationware; next version (6.0) will be $60 ● Numerous other bells and whistles ● Windows only
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Introduction to Digital Modes Creede Lambard WA7KPK Software ● Fldigi ● Reasonably fast ● Keyboard-to-keyboard modes only (no JT65) ● Developer is very responsive ● Associated utilities: flrig (rig control), flmsg, etc. ● Windows/Linux/Mac
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Introduction to Digital Modes Creede Lambard WA7KPK Software ● JT65-HF ● JT65 and similar modes only (no keyboard-to- keyboard) ● IMO much superior to the original JT65 software for HF use ● Developer in poor health ● Windows only; Linux version does not work on recent distributions
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Introduction to Digital Modes Creede Lambard WA7KPK Software ● Others
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Introduction to Digital Modes Creede Lambard WA7KPK Software ● Your favorite browser ● Useful for propagation maps, callsign lookups, help with your program, etc. ● Logging program (your preference)
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Introduction to Digital Modes Creede Lambard WA7KPK My digital software setup
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Introduction to Digital Modes Creede Lambard WA7KPK Comments/questions?
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Introduction to Digital Modes Creede Lambard WA7KPK This deck will be available at http://www.lambard.net/radio/ digitalmodes.ppt
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Introduction to Digital Modes Creede Lambard WA7KPK Thank you!! 73 ES GUD DX DE WA7KPK!!
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