Why ACDC input coupling push -button switch is given?

ACDC input coupling push-button switches are used to selectively connect or disconnect AC and DC signals to a circuit. This allows for easier testing and troubleshooting by enabling the user to toggle between different signal types without manually rewiring connections. Additionally, it helps prevent potential damage to sensitive components by ensuring that only the appropriate signal type is applied to the circuit. This functionality enhances versatility and safety in electronic applications.