Table of Contents
Advertisement
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.
AMP Gain is controlled by AGC circuits in IF Demodulator.
ⓒ Double Tune
-. Improve the band quality,
-. minimize the loss of band signal
-. Remove the spurious signal
Advertisement
Table of Contents
