Which of the following is a method to demonstrate a soft reset on TACAN?

Demonstrating a soft reset on TACAN systems often involves manipulating the operational settings of the equipment without fully powering it down. Turning the affected channel on or off achieves this by temporarily disrupting the channel's signal processing, allowing the system to reset its status without requiring a complete shutdown. This method can help to clear minor faults or glitches in the system without the need for more disruptive actions like disconnecting power.

In contrast, disconnecting and reconnecting the power supply is more characteristic of a hard reset, which fully powers down the system and may lead to longer downtime. Updating the software typically involves significant changes and procedures beyond a simple reset. Performing regular maintenance checks is essential for proper operation but does not directly relate to the soft reset process of a TACAN system. Thus, the method that best illustrates a soft reset correctly highlights the ability to quickly and efficiently refresh the operational state of a specific channel.