The following diagram depicts the design of an 8 Camera CCTV Circuit Diagram using ZXFV302. The ZXFV302 is a 4:1 high speed analog switch designed for use as a buffered video multiplexer. This CCTV circuit diagram are suitable for 75 Ohm transmission line connections at both the input and the output and are useful for distribution of wide-band signals such as video via cables.
The 75Ohm reverse terminating resistor at the output gives the correct matching condition to a terminated video cable. The amplifier load is then 150 Ohm.