Is there any tutorial/description from which I can understand how tuners( p=
referably satellite=20
 tuners) work?=20
 E.g.=20
 BSBE2 Alps tuner series use various signals, in datasheet marked as=20
 +B1 (RF-AMP)=20
 +B2 (DCR)=20
 +B3 (I/F)=20
 +B4 (CORE)=20
 etc.=20
 and I do not know what they are for.=20
 Can anyone explain please?Thank you

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