The LM1823 is a video I.F. amplifier designed to operate at intermediate carrier frequencies up to 70 MHz, and employ phase locked loops for synchronous detection of amplitude modulation on these carrier frequencies. The high gain, wide AGC range and low noise of the LM1823 make it ideal for use in television receivers, video cassette recorders and in cable TV set-top converters requiring high quality detected base-band video and an audio intercarrier. source

This circuit provides a simple and complete TV video solution for a single SCART application. The design uses four MAX9502G video amplifiers as the video driver and lowpass reconstruction filter. It also implements the fast blanking and slow switching functions by using just four transistors. source