Calls - jimilinuxguy/portapack-mayhem GitHub Wiki
Initially from: https://github.com/furrtek/portapack-havoc/wiki/Close-Call
The Calls mode is similar in functionality to the one on many Uniden scanners.
It allows to define a frequency range to scan (min/max), and a power threshold (trig). If a signal appears above the power threshold for a sufficient amount of time, the signal's frequency is "locked", shown in green and logged in a table at the bottom of the screen.