Small Signal Processing Section
Small signal processing section is the IF (intermediate frequency) signal across saw filter send in
the pin12 and pin13 of IC201. The VIFIN signal through built-in PLL DEMOD, sound trap, video
amplifier and synchronous detector processing, get the color video broadcast signal and 2
nd
sound
IF signal.
Video signal processing section is CVBS across video filter and delay line and horizontal &
vertical synchronous separation circuit processing and get H-drive (pin56 of IC201)and V-drive
signal (pin15/pin15 of IC201).
IF sound signal across the sound-down-mixer and AM demodulator processing, send out the AVL/
SSIF OUT signal. ( Refer to Fig2 and Fig 3.)
(Fig 2. Small Signal Processing Section)
To Next Page
Loading...
