Cascade Video Input Electrical Specifications

The VIDEO connector has one Cascade Video Input port.

The ports have two pins named VID_IN_CAS and VRN_IN_CAS respectively. The "hot conductor" of the transmission line transporting the video signal "xx" has to be connected to the VID_IN_CAS pin, while the "cold conductor" of the transmission line has to be connected to the corresponding VRN_IN_CAS pin. If the transmission line is a coaxial line, the "hot conductor" is the inner conductor, and the "cold conductor" is the outer conductor.

A fixed 75Ω termination resistor is inserted across VID_IN_CAS and VRN_IN_CAS.

When this is applied on the VIDEO connector port, the cascade video signal flows through a common-mode choke, which attenuates the common-mode noise present on the video signal. The VRN_IN_CAS pin is connected to the analog GND through one winding of the common-mode choke. The VID_IN_CAS pin is connected to the second winding.

The filtered video signal is available on the VIDEO CASCADE connector. It is applied to the Video Output multiplexer through a coupling capacitor.

Cascade Video Input circuit

Cascade Video Input - DC characteristics

Parameter

Min

Typ.

Max

Units

Input voltage range - Absolute max rating

-2

 

+2

V

Input impedance

 

75

 

Ω