An Introduction to Software Defined Radio - Sea-Pacseapac.org › seminars › 2018 ›...
Transcript of An Introduction to Software Defined Radio - Sea-Pacseapac.org › seminars › 2018 ›...
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AnIntroductiontoSoftwareDefinedRadio
• What is it?• Why do I want one?• How do I choose one?
SteveBrightman
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WhatisanSDR?
www.sdrplay.com
• A radio communication systemwheremanycomponentsthathavebeentraditionallyimplementedinhardware…
(e.g. mixers, filters, amplifiers, modulators/demodulators,detectors,etc.)
…areimplementedbysoftwareonaPCor embeddedsystem.
• Thehardwareportionconsistsofpre-selectionfilters,possiblysomeIFfilteringandaAnalog-to-digitalconverter
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WhydoIwantone?
TopTenList1. Truegeneralcoverage2. Workonefrequencyandstillmonitortheband(oranotherband!)
• Panadapter (suddenlyyoureyescando1000Xwhatonlyyourearscoulddopreviously,onesignalatatime!)
3. Filters!(brick-wallenvelopes…improvingallthetimewiths/wupgrades)4. AudioandIFDigitalSignalProcessing(DSP)5. HarnessthepowerofyourexistingComputer6. MultipleVFOsand/orvirtualreceivers7. Recordlargebandwidthsofthespectrumandtunelater!8. Record/playbackofaudiofromaspecificsignal9. Allowsyoutoexplorenewapplications:
• Digitalmodes,WXsatellites,radioastronomy,aircraftmonitoring,digitalstations,TV,DAB,Ionosondes!etc etc
10. Canyoueverhavetoomanyreceivers?
www.sdrplay.com
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ApplicationExamples
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www.sdrplay.com
DigitalDecodingFldigi NBEMS(NarrowBandEmergencyMessagingSystem)
Credit:JeffKopcak,k8jtk
Fldigi:http://www.w1hkj.com
Credit:ErikMikkel Wied
…andWEFAX Decoding
AlsosupportsDSD,DSD+,MultiPSK,DM780andmoreviaVACandCATcontrol
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www.sdrplay.com
ADS-BdecodingexampleusingDump1090andVRS
Credit:MaxSantos,AC5PY
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Satelliteworking
www.sdrplay.com
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www.sdrplay.com
NOAAWeathersatellite(137MHz)-Wxtoimg (RSP1)
Credit:JeffBroughton,WB8RJY
Credit:Sefi Merkel
Userpicturesfromthefacebook group:www.facebook.com/groups/sdrplay/
Wxtoimg:http://www.wxtoimg.com
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www.sdrplay.com
HighResolutionsatelliteimages(1.7GHz)RSP2 ..includinglatestGOES-16
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SDRplay forumonSatimaging
www.sdrplay.com
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TuneintoJupiter!
www.sdrplay.com
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www.sdrplay.com
DoublesasanewpieceofRFlabkit:anRFPowermeter– getoneforworkorplay!
Within1dBaccuracy!
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SDRhardware
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SDRVariety
www.sdrplay.com
Performan
ce
Price
8-bitDongles
HighEnd
GeneralPurpose
• $10– 100• Lowperformance• Introductory
• $100– 200• Goodperformance• WideCoverage• RSP,Airspy etc
• $500– 1000s• Highperformance• Specializedfunctionality• RFSpace,Flex,ELADetc
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ReviewofSDRreceivers– whattoconsider:
• FrequencyRange: TherangeoffrequenciestheSDRcantune.• ADCResolution: Higherisbetter.Moreresolutionmeansmoredynamicrange,lesssignalimaging,alowernoisefloor,moresensitivitywhenstrongsignalsarepresentandbetterabilitytodiscernweaksignals.
• InstantaneousBandwidth: The sizeoftherealtimeRFchunkavailable.• RX/TX: Cantheradioreceiveand/ortransmit?• Preselectors: Analoguefiltersonthefrontendtohelpreduceoutofbandinterferenceandimaging.
• Software: Isyourfavouritepackagesupported?Doesmanufacturerprovide?• Price
www.sdrplay.com
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www.sdrplay.com
• ContinuousSDRreceivercoveragefromVLFto2GHz• AlltheamateurradiobandsfromVLFto23cm• HighperformanceADCtechnology(notanothercompromiseSDR!)• Built-inhighperformancefront-endfilters• Useasastand-alonegeneralcoveragereceiver,orasahighresolutionpanadapter• Visualizeallthesignalsinmultiplebandssimultaneously• SDRuno WindowsSDRsoftwareprovidedfree-of-charge• Alsoworkswithotherplatforms(Mac,Linusetc)andpopularSDRSoftware(e.g.HDSDR,SDR-Console&CubicSDR)
• RunonaRaspberryPi3– downloadourSDCardimage• Idealforportableoperation(poweredviaUSB)• CanbeusedasaSpectrumAnalyzeroranRFPowerMeter• Backedbytheworld’sbiggestandbestSDRsupportcommunity!
SDRplay Receivers– RSPFamily
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10MHzvisibility
www.sdrplay.com
1kHz 2GHz
Instantaneousbandwidthillustration
RSP1 RSP2 RSP2pro RSP1a
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IntroducingtheRSPduo
www.sdrplay.com
…thebiggestchangetoSDRsincetheRSP1!
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RSPduo -Dualindependenttuners!
www.sdrplay.com
1kHz 2GHz
Twoindependent“slices”anywhereinthecoveragerange
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Monitortwowidelyspacedbands
www.sdrplay.com
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Mixandmatchapplications,simultaneously
www.sdrplay.com
ADSBATC
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Software
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Software
• Popular 3rd Party free software includes:
• Manufacturer provided software, e.g. SDRuno for the RSP family
www.sdrplay.com
SDRConsole HDSDRCubicSDR
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RSPSoftwareavailabilty/compatibility
• Multi-platformsupportforWindows,Mac,Linux,Android,RaspberryPi2/3
• SDRuno WindowsSDRs/w(basedonStudio1whichcost$179)providedfreeofcharge
• ExtIO compatibility
• SupportsCubicSDR forMAC,LinuxandRaspberryPi3users
• Softwareupgradeableforfuturestandards
• APIprovidedtoallowdemodulatororapplicationdevelopment
• Workswellwith3rd Partyfree softwareincluding:
www.sdrplay.com
SDRConsole HDSDRCubicSDR
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SDRuno
www.sdrplay.com
SDRuno providesaruggedandflexible,highperformanceSDRreceivercapability,featuring:
• Multiple‘VirtualReceivers’whichallowforsimultaneousreceptionanddemodulationofdifferenttypesofsignalswithinthesamereceiverbandwidth
• Aselectivityfilterwithanultimaterejectiongreaterthan140dB
• Auniquedistortion-freedoublestageAGCwithfullyadjustableparameters
• MultiplenotchfilterswithBWadjustabledownto1Hz,NotchLockfeature
• AuniquesynchronousAMmodewithselectable/adjustablesidebands,dedicatedPLLinputfilter,andselectablePLLtimeconstants
• Recordandplaybackanentireamateurband!
• 29pre-setamateurandbroadcastbands
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MultipleVFOs&differentdecodemodessimultaneously!
www.sdrplay.com
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HamBandFraming+RFpowerlevel+SNRmeasurement&logging
www.sdrplay.com
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Panadapters
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WhatisaPanadapter?
www.sdrplay.com
• “Panadapter isshortforPanoramicAdapter.Thesimpleansweristhatitallowsustoseeapanoramicdisplayofthebandourradioistunedto.Wecanseeeverysignal”*.
• EarlyimplementationsusedaPCsoundcardtoachievethisfunctionbutwerethereforelimitedto200kHzofbandwidth becausetheyrelyonthe soundcard.
• TheadventofaffordableSDRhardwaresuchastheRSP1Ahasallowedimplementationswithmuchgreaterbandwidth,andhencemuchmoreusefulness.
• Combinedwithreadilyavailable,andcapable,SDRsoftwarePanadapters arenowanaffordableandeasytoimplementreality!
*DefinitioncourtesyKA9MOThttp://mypanadapter.com/
“Go-to”choiceforKenwood,Yaesu,Icom,Elecraft etc!
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Whypanadapter?
• Addnewcapabilities/visibilitytoanyrig• SynchronizethetherigtothesoftwareifithasaCATport• Workonefrequencywhilemonitoringthewholeband• Monitormultiplebandsinadditiontotheoneyou’reworking• Arbitrarilylargespectrumscope• Lesscost,morefeaturesthanfactoryadd-ons,
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Monitoring3bandswithSDRuno
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TheperfectPanadapter companionforyourrig
www.sdrplay.com
• AnyoftheSDRSoftwareprogramsthatsupportRSPcanbeusedtoprovideabasicspectrumdisplay.
• SDRuno,HDSDRandSDRConsolehavebuilt-incapabilitiesforCATandotheradd-onsoftware,toallowforcommunicationbetweentheSDRsoftwareandthetransceiver.
• HamRadioDeluxeandOmniRig arecommonlyusedforsynchronization/controlbetweentheTRx andSDRRx.
• Appnotesandvideosavailablefromsdrplay.com
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UseaT/RswitchifnotusingprotectedtransceiverIForRFout!
www.sdrplay.com
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Supportandfurtherinformation
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Softwareanddocumentation,appnotes,how-toguides
www.sdrplay.com
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How-tovideos:SDRplay YouTubeChannel
www.sdrplay.comwww.youtube.com/c/SDRplayRSP
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FacebookGroup
www.sdrplay.com
8000usershelpingeachother!
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DirectsupportfromSDRplay
www.sdrplay.com
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Hardware+Software+Community=
www.sdrplay.com
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Formoreinformation
• Companywebsite:www.sdrplay.com• Wehavedistributorslocatedworldwide• USDistributor:HamRadioOutlet
• CommunityForums:www.sdrplay.com/community/
• Email:• NorthAmerica:[email protected]• RestofWorld:[email protected]
• Facebook:SDRplay andSDRuno specifically• Independentgroupsrunbyenthusiasticusers!
• Google/YouTube• Manyvideoscoveringhowtousethevarioussoftwarepackages,implementingpanadapters andmuchmore.UsetheGooglesearchfunction!
• SDRplay channel:www.youtube.com/c/SDRplayRSP
www.sdrplay.com
SeetheRSPfamilyattheHRObooth!