Samsung DVD-HR750 Introducing page 49

 Tuner
Tuner consists of LPF/HPF,Single Tune,RF amplifier,Double Tune and MOP circuits.(see the
block diagram)
ⓐ LPF/HPF(Low Pass Filter/High Pass Filter)
- . IF rejection : preventing for IF frequency signal interference from antenna.
- . LPF : for VHF band ,remove UHF band signal
- . HPF : for UHF band, remove VHF band signal
ⓑ Single Tune/RF AMP
- . Single Tune: for receiving Channel initially
- . RF AMP : Gain control of tuned signal from Single Tune.
ⓒ Double Tune
- . Improve the band quality,
- . minimize the loss of band signal
- . Remove the spurious signal
AMP Gain is controlled by AGC circuits in IF Demodulator.