BS2F7VZ7903原装夏普高频头，可替代7395，7306ADESCRIPTION]ThisspecificationcoversDBStunerintendedforuseinDigitalBroadcastingSatellites.Thistunerincorporates"LINK"sectionthatiscomposedofDVBstandardQPSKdemodulationcircuitandFEC(ForwardErrorCorrection)circuit.Thistunerhas8-bittransportstreamoutput.[1]GENERALSPECIFICATI***1-1Receivingfrequencyrange950MHzto2150MHz1-2Inputlevel-65dBmto-25dBm1-3InputstructureFtypeFemale1-4Nominalinputimpedance75ohm1-5ChannelselectionsystemPLLsynthesizer(Clock4.0MHz)1-6Stepfrequency500kHz1-7I/QoutputLPFcutofffrequency(-3dB)10MHzto30MHz,variable(2MHzstep)1-8Symbolrate2Mspsto45Msps1-9Roll-offFactor35％(root-raisedcosine)1-10LINKICSTV0288(Clock:4MHz,Address:D0(HEX))1-11FECInnerdecoder:Viterbisoftdecoder,C***traintlengthM=7Puncturedcodes1/2,2/3,3/4,5/6,7/8AutomaticormanualrateandPhaserecognitiondeinterle***erWordsynchroextractionConvolutivedeinterle***erOuterdecoder:Reed-solomondecoder,for16paritybytesBlocklengths204byteEnergydispersaldescrambler1-12Absolutemaximumratings(B2)-0.30to+4.00VDC(B3)-0.30to+3.63VDC(B4)-0.30to+4.00VDC(VDD)-0.25to+2.75VDC1-13OperatingvoltageLNBvoltage(B1A,B1B)25V,400mAmaxSupplyvoltage(B2)3.3V+/-0.165VDC(B3)3.3V+/-0.165VDC(B4)3.3V+/-0.165VDC(VDD)2.5V+/-0.125VDC1-14CircuitblockdiagramFig.11-15ConnectiondiagramFig.21-16Mass35g1-17StorageconditionTemperature15deg.Cto35deg.CHumidity25%RHto75%RHPeriod6months1-18EnvironmentalcharacteristicsRoHScompliant(RoHSreferstothe"DIRECTIVE2002/95/ECOFTHEEUROPEANPARLIAMENTANDOFTHECOUNCILof27January2003ontherestrictionoftheuseofcertainhazardoussubstancesinelectricalandelectronicequipment.")1-19Attentionitems:1)Thisunitcontainscomponentsthatcanbedamagedbyelectro-staticdischarge.Beforehandlingthisunit,groundyourhands,tools,workingdesksandequipmenttoprotecttheunitfromElectronicStaticDestroy.2)***oidfollowingacti***;a)tostorethisunitintheplaceofthehightemperatureandhumidity.b)toexposethisunittocorrosivegases.)