E4000 USB DVB-T RTL-SDR Realtek RTL2832U R820T DVB-T Tuner Receiver

E4000 USB DVB-T RTL-SDR Realtek RTL2832U R820T DVB-T Tuner Receiver Descriptions: 1.Stickswiththiscombination(RTL2832+R820T)arerelativelynewonthemarket.ThemaindifferencetoalltheothersupportedtunerssofaristhatitusesaLow-IF(3.57MHz)architectureinsteadofZero-IF.ThatmeansthetunerisonlyconnectedtotheIn-PhaseADCinput,andtheinternaldownconverteroftheRTL2832isgeneratingthecomplexsamples.ThishasthebenefitofhavingnoDCoffsetspikeinthemiddleofthespectrum.SofarthetunerdrivercomesstraightfromthekerneldriverthatRealteksupplies,andsettinggainmanuallyisnotsupportedyet,althoughfunctionsforthatseemtoexist.Thereisstillisalotthatneedstobedone,thebestthingmostlikelywouldbetocompletelyrewritethedriver,oratleastcleanitupdramatically.Initializingthetunertakeswaytoolongatthemoment,sincethedriverproducesalotofI2Ctraffic,mostofitbeingredundantasitseems. 2.ThedrivershowedthatthePLLofthisstickcanachievelockupto1766MHz,andindeedbothADS-Bat1090MHzandL-BandDABat1463MHz,aswellasGMRat1556MHzcanbereceivedjustfinewiththeR820T.Also,thePLLcouldlockagainat1850MHzto1860MHz,andthereceptionofaGSM1800BTSat1854MHzworkedaswell. 3.SomeinitialcomparisonsbetweentheE4000andR820TseemtohintattheR820Tbeingabitmoresensitive,especiallyvisibleintheTetrascreenshots. 4.GiventhatthesupplyofE4000-basedsticksisdwindling,thisitemisnewtunerthathasthepotentialofbecomingagoodreplacement,andstayingforawhileonthemarket. 5.WorkinAlbania,Algeria,Andorra,Australia,Austria,Bahrain,Belarus,Belgium,Bermuda,Brunei,Croatia,CzechRepublic,Denmark,Estonia,FaroeIslands,Finland,France,Ghana,Hungary,Italy,Kenya,Latvia,Lithuania,Luxembourg,Malaysia,Malta,Mauritius,Morocco,Myanmar,Namibia,Netherlands,NewZealand,Norway,Panama,Poland,Portugal,RepublicofMacedonia,Russia,SaudiArabia,Singapore,Slovakia,Slovenia,SouthAfrica,Spain,Sweden,Switzerland,Taiwan,TrinidadandTobago,Tunisia,Turkey,Ukraine,UnitedKingdom,Uruguay,Vietnam 6.Itdoesn'tsupportUS,Canada,Japan,Singaporeusersduetodifferentdigitalstandard 7.TheRTL2832Uoutputs8-bitI/Q-samples,and