Received signal strength indication link like other metrics such as travel time measurement (time of arrival). Received signal strength indication In telecommunications, received signal strength indicator (RSSI) is a measurement of the power present in a received radio signal. RSSI is usually invisible to a user of a receiving device. However, because signal strength can vary greatly and affect functionality in wireless networking, IEEE 802.11 devices often make the measurement available to users. RSSI is often derived in the intermediate frequency (IF) stage before the IF amplifier. In zero-IF systems, it is derived in the baseband signal chain, before the baseband amplifier. RSSI output
Lock-out device Lock-out device A lock-out device is a system used on game shows, particularly trivia shows, to determine in real time which contestant has activated their signal first. The system is designed to detect the first signal it receives and ignore subsequent signals. The system provides some indication of which contestant has signaled, such as a light or sound for each contestant, allowing the relevant parties to clearly determine who has signaled first. The device used by a contestant to send a signal to the lock-out system is called a signaling device (or more commonly a buzzer, perhaps due to the