New Hf Digital Modes Sadars 2009
-
Upload
business-continuity-uk -
Category
Self Improvement
-
view
1.640 -
download
5
description
Transcript of New Hf Digital Modes Sadars 2009
![Page 1: New Hf Digital Modes Sadars 2009](https://reader033.fdocuments.us/reader033/viewer/2022061120/546c5a13af7959ba0e8b5879/html5/thumbnails/1.jpg)
Presentation to Shefford & District ARSGareth Howell – M5KVK
![Page 2: New Hf Digital Modes Sadars 2009](https://reader033.fdocuments.us/reader033/viewer/2022061120/546c5a13af7959ba0e8b5879/html5/thumbnails/2.jpg)
AgendaSome backgroundNew modes to be coveredA couple of odd-balls
![Page 3: New Hf Digital Modes Sadars 2009](https://reader033.fdocuments.us/reader033/viewer/2022061120/546c5a13af7959ba0e8b5879/html5/thumbnails/3.jpg)
Some BackgroundTwo basic families:PSK
(Digital Binary Phase-Shift Keying) PSK 31, 63, 125 etc No error correction Low bandwidth
MFSK (Multi Frequency-Shift Keying) RTTY, Piccolo, Coquelet MFSK 4, 8, 16 (42WPM) Sensitive Good rejection of Doppler
![Page 4: New Hf Digital Modes Sadars 2009](https://reader033.fdocuments.us/reader033/viewer/2022061120/546c5a13af7959ba0e8b5879/html5/thumbnails/4.jpg)
New Modes to be coveredDominoExOlivia
![Page 5: New Hf Digital Modes Sadars 2009](https://reader033.fdocuments.us/reader033/viewer/2022061120/546c5a13af7959ba0e8b5879/html5/thumbnails/5.jpg)
DominoExMurray ZL1BPU18 tone FSKDesigned to overcome limitations in MFSKOptimised for NVIS (80/40/30m)VaricodeIncremental Frequency Keying
Reduces tuning sensitivityAnd drift
![Page 6: New Hf Digital Modes Sadars 2009](https://reader033.fdocuments.us/reader033/viewer/2022061120/546c5a13af7959ba0e8b5879/html5/thumbnails/6.jpg)
CharacteristicsVariants named after Baud rateImproved tolerance to multi-pathImproved rejection of impulse noiseNo need for FEC in normal use
Higher speed than MFSKShorter sync time
i.e. faster turn around in QSO mode
![Page 7: New Hf Digital Modes Sadars 2009](https://reader033.fdocuments.us/reader033/viewer/2022061120/546c5a13af7959ba0e8b5879/html5/thumbnails/7.jpg)
DominoEx 8Used on poorer circuits (50WPM)
![Page 8: New Hf Digital Modes Sadars 2009](https://reader033.fdocuments.us/reader033/viewer/2022061120/546c5a13af7959ba0e8b5879/html5/thumbnails/8.jpg)
DominoEx 16Higher speed, used on better circuits
(100WPM)
![Page 9: New Hf Digital Modes Sadars 2009](https://reader033.fdocuments.us/reader033/viewer/2022061120/546c5a13af7959ba0e8b5879/html5/thumbnails/9.jpg)
OliviaInvented by Pavel SP9vRC64-FSK - sequentialMultiple variants
Tones and BandwidthMultiple Baud ratesVaricode and Forward Error Correction
![Page 10: New Hf Digital Modes Sadars 2009](https://reader033.fdocuments.us/reader033/viewer/2022061120/546c5a13af7959ba0e8b5879/html5/thumbnails/10.jpg)
CharacteristicsHorses for courses
Fewer tones mean higher speedMore tones add robustness
Works over very poor S/N circuitsOften not visible or audibleVoluntary channelisation
![Page 11: New Hf Digital Modes Sadars 2009](https://reader033.fdocuments.us/reader033/viewer/2022061120/546c5a13af7959ba0e8b5879/html5/thumbnails/11.jpg)
Olivia VariantsBandwidth/Tones500/16
19.5 wpmUsed for CQ and QSOs in average conditions
1000/3224.4 wpmUsed for CQ and QSOs in average conditions
500/829.3 WPMQSOs on higher bands
1000/16500/4250/8
![Page 12: New Hf Digital Modes Sadars 2009](https://reader033.fdocuments.us/reader033/viewer/2022061120/546c5a13af7959ba0e8b5879/html5/thumbnails/12.jpg)
Olivia Variants
![Page 13: New Hf Digital Modes Sadars 2009](https://reader033.fdocuments.us/reader033/viewer/2022061120/546c5a13af7959ba0e8b5879/html5/thumbnails/13.jpg)
![Page 14: New Hf Digital Modes Sadars 2009](https://reader033.fdocuments.us/reader033/viewer/2022061120/546c5a13af7959ba0e8b5879/html5/thumbnails/14.jpg)
Olivia 500/16
![Page 15: New Hf Digital Modes Sadars 2009](https://reader033.fdocuments.us/reader033/viewer/2022061120/546c5a13af7959ba0e8b5879/html5/thumbnails/15.jpg)
Olivia 1000/16
![Page 16: New Hf Digital Modes Sadars 2009](https://reader033.fdocuments.us/reader033/viewer/2022061120/546c5a13af7959ba0e8b5879/html5/thumbnails/16.jpg)
A couple of odd-ballsHF-ALEWSJT
![Page 17: New Hf Digital Modes Sadars 2009](https://reader033.fdocuments.us/reader033/viewer/2022061120/546c5a13af7959ba0e8b5879/html5/thumbnails/17.jpg)
HFLINK (ALE)Automatic Link Establishment (ALE)Focused on emergency communicationsPermanent Global network
24x7 on 8 HF bandsMIL-STD-188-141A
SSB/Text/SMS/InternetScanningSounding
![Page 18: New Hf Digital Modes Sadars 2009](https://reader033.fdocuments.us/reader033/viewer/2022061120/546c5a13af7959ba0e8b5879/html5/thumbnails/18.jpg)
WSJTJT65Very slow speedOptimised for very weak signals
Troposcatter/EME/65-MFSK, FECJT65-HF variant for HF
![Page 19: New Hf Digital Modes Sadars 2009](https://reader033.fdocuments.us/reader033/viewer/2022061120/546c5a13af7959ba0e8b5879/html5/thumbnails/19.jpg)
References-1Domino
DominoEX - an IFK Mode for HF http://snurl.com/n7vwv
OliviaWB8ROL Olivia Digital Mode Information
Page http://snurl.com/n7vqzThe International Olivia Digital Mode
Group http://snurl.com/n7vsoOlivia Frequencies http://snurl.com/n7vze
![Page 20: New Hf Digital Modes Sadars 2009](https://reader033.fdocuments.us/reader033/viewer/2022061120/546c5a13af7959ba0e8b5879/html5/thumbnails/20.jpg)
References-2HFLINK
http://snurl.com/n7wdhJT65A and WSJT
The Complete Bozo's Guide to HF JT65A http://snurl.com/n7w4z
Schedshttp://snurl.com/n7vv8
![Page 21: New Hf Digital Modes Sadars 2009](https://reader033.fdocuments.us/reader033/viewer/2022061120/546c5a13af7959ba0e8b5879/html5/thumbnails/21.jpg)
Questions ??