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Useful DSP Tools for VHF and Up Operating

Useful DSP Tools for VHF and Up Operating. PackRats MUD20007 DVD compiled by W3SZ. D:startlocal.htm. You need more than just DSP!. VHF and UP vs HF. HF Contest “Problem” Multiple closely packed bone-crushing signals dBm/Hz integrated over front-end passband Noise Changing propagation

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Useful DSP Tools for VHF and Up Operating

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  1. Useful DSP Tools forVHF and UpOperating W3SZ MUD 2007 PackRats

  2. W3SZ MUD 2007 PackRats PackRats MUD20007 DVDcompiled by W3SZ • D:\startlocal.htm

  3. W3SZ MUD 2007 PackRats

  4. W3SZ MUD 2007 PackRats

  5. W3SZ MUD 2007 PackRats

  6. W3SZ MUD 2007 PackRats

  7. W3SZ MUD 2007 PackRats

  8. W3SZ MUD 2007 PackRats You need more than just DSP!

  9. W3SZ MUD 2007 PackRats

  10. W3SZ MUD 2007 PackRats VHF and UP vs HF • HF Contest “Problem” • Multiple closely packed bone-crushing signals • dBm/Hz integrated over front-end passband • Noise • Changing propagation • New multipliers • DSP/SDR help by providing • Extremely effective noise reduction/blanking • Band activity map • Extremely steep filters

  11. W3SZ MUD 2007 PackRats VHF and UP vs HF • Lower VHF Contest “Problem” is Similar to HF • Multiple closely packed bone-crushing signals • dBm/Hz integrated over front-end passband • Noise • Changing propagation • New multipliers • DSP/SDR help by providing • Extremely effective noise reduction/blanking • Band activity map • Extremely steep filters

  12. W3SZ MUD 2007 PackRats VHF and UP vs HF • Lower VHF Contest “Problem” is Similar to HF • Multiple closely packed bone-crushing signals • dBm/Hz integrated over front-end passband • Noise • Changing propagation • New multipliers • DSP/SDR help by providing • Extremely effective noise reduction/blanking • Use this slide to demonstrate Linrad Noiseblanking • Next slide shows bandmap and filter

  13. VHF and UP vs HF • Lower VHF Problem is Similar to HF • Multiple closely packed bone-crushing signals • dBm/Hz integrated over front-end passband • Noise • Awareness of changing propagation • Awareness of new multipliers • DSP/SDR help by providing • Extremely effective noise reduction/blanking • Band activity map • Extremely steep filters • Use this slide to show examples [Audio/Visual] NB, Linrad Filter Curve, and Band Activity Map W3SZ MUD 2007 PackRats

  14. W3SZ MUD 2007 PackRats Finding a spot on 6 meters

  15. W3SZ MUD 2007 PackRats VHF and UP vs HF • Upper VHF and Lower UHF Contest “Problem” 222 and 432 MHz are ‘transition bands’ • Noise Not generally an issue • Changing propagation • New stations/multipliers • Minor frequency uncertainty • DSP/SDR help by providing • Band activity map • Sensitive, realtime, 150-190 kHz bandscope

  16. W3SZ MUD 2007 PackRats VHF and UP vs HF • 903 MHz Contest “Problem” • Cellular and Paging System Noise • Moderate Frequency uncertainty • DSP/SDR help by providing • Sensitive, realtime, 150-190 KHz bandscope • Less effective on this band unless noise is removed • Noise Reduction

  17. VHF and UP vs HF • 903 MHz Problem • Cellular and Paging System Noise • Greatly reduce the effectiveness of the Bandscope • Moderate Frequency uncertainty • DSP/SDR help by providing • Sensitive, realtime, 150-190 KHz bandscope • Less effective on this band as noted above • Use this slide to show example Linrad Bandscope in 903 MHz W3SZ MUD 2007 PackRats

  18. W3SZ MUD 2007 PackRats

  19. W3SZ MUD 2007 PackRats

  20. W3SZ MUD 2007 PackRats VHF and UP vs HF • 1296 MHz and Up Contest “Problem” • “Needle in a haystack” problem • Frequency uncertainty • Antenna heading uncertainty • Time coordination a necessity • Noise is not an issue • DSP/SDR help by providing • Sensitive, realtime, 150-190 KHz bandscope • DSP/SDR totally changes the paradigm

  21. W3SZ MUD 2007 PackRats VHF and UP vs HF • 1296 MHz and Up Contest “Problem” • Show blank screen • Play audio no signal • Role-play contact without DSP • Show Linrad Bandscope with signal at extreme end • Play audio with no signal • “Click on Signal” • Play audio with signal • Role-play contact with DSP • Again mention 72 kHz off-frequency 24 GHz contact • Would it have been made without Linrad??

  22. W3SZ MUD 2007 PackRats

  23. W3SZ MUD 2007 PackRats

  24. W3SZ MUD 2007 PackRats

  25. W3SZ MUD 2007 PackRats

  26. W3SZ MUD 2007 PackRats Station Design • All bands 50 MHz thru 24 GHz / Single Operator • Goals: • Maximize Ease of Operation • Automate Bandswitching using Software Control • Achieve accurate, stable frequency control • GPS Lock 902 MHz and above • Maximize Information Control: know what is happening on multiple bands at all times • Linrad Bandscopes

  27. W3SZ MUD 2007 PackRats

  28. W3SZ MUD 2007 PackRats Station Design [2] • Logging Program [RoverLog] provides [via parallel port] Automatic Bandswitching of all functions: • IF transceiver / transverter connections • T/R Sequencing / control of: • Transverters • Power amplifiers • Receive preamplifiers • One main IF rig is used for all bands • Separate ancillary rig is used for microwave liaison using any of 144, 222, 432 MHz

  29. W3SZ MUD 2007 PackRats Block Diagram

  30. W3SZ MUD 2007 PackRats Information Control • Linrad bandscope constantly monitors 150-190 kHz wide portion of primary band using RF Space’s SDR-IQ as “28 MHz front end” • Typing “Q” instantly moves the main radio [FT1000MP] to the frequency of an interesting signal seen/heard on this bandscope • Four “always on” auxiliary Linrad bandscopes constantly monitor 50-432 MHz • SDR-IQ/SDR-14 on Six and Two meters provide 150-190 kHz wide bandscopes • Soft-Rock / Delta44’s on 222 and 432 MHz provide 96 kHz wide bandscopes. • Typing ‘Q’ instantly moves the main radio [FT1000MP] to the frequency of an interesting signal seen/heard on any one of the four auxiliary bandscopes • The bandscopes are fed via splitters from the 28 MHz IF receive outputs of the transverters

  31. W3SZ MUD 2007 PackRats

  32. W3SZ MUD 2007 PackRats

  33. W3SZ MUD 2007 PackRats

  34. W3SZ MUD 2007 PackRats

  35. Information Control • Role-play multiple band run [SSB] • Show linrad screens, ‘walk thru’ RoverLog bandswitching Always have other station transmit first. Click on signal Type ‘Q’ Say “K1DS W3SZ FN20 QSL QSY” Hit Function Key to move to next band W3SZ MUD 2007 PackRats

  36. Information Control • Role-play multiple band run [SSB] • Show linrad screens, ‘walk thru’ RoverLog bandswitching If signal is weak and you are on CW Type ‘Q’ to center signal, then peak antenna heading Say on liaison frequency “I’ve got you; start exchange” Complete exchange, send “QSL QSY” Hit function key to go to next band. W3SZ MUD 2007 PackRats

  37. W3SZ MUD 2007 PackRats SDR • Software • Linrad; receive only; “Linrad transceiver” • Winrad; receive only; dll available • PowerSDR; both transmit and receive • Hardware • WSE receiver from SM5BSZ • SDR-14 and SDR-IQ from RF Space • Flex-5000 and SDR-1000 from Flex-Radio • [SoftRock from KB8YIG]

  38. Software Product Matrix Part I W3SZ MUD 2007 PackRats

  39. Software Product Matrix Part II W3SZ MUD 2007 PackRats

  40. Linrad Screen W3SZ MUD 2007 PackRats

  41. Software Product Matrix Part I W3SZ MUD 2007 PackRats

  42. Software Product Matrix Part II W3SZ MUD 2007 PackRats

  43. Winrad Screen W3SZ MUD 2007 PackRats

  44. Software Product Matrix Part I W3SZ MUD 2007 PackRats

  45. Software Product Matrix Part II W3SZ MUD 2007 PackRats

  46. PowerSDR Screen W3SZ MUD 2007 PackRats

  47. W3SZ MUD 2007 PackRats

  48. W3SZ MUD 2007 PackRats

  49. Software Product Matrix Part I W3SZ MUD 2007 PackRats

  50. Software Product Matrix Part II W3SZ MUD 2007 PackRats

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