Off-Hook Scan Enable: 1 of 2 Toggle No or Yes using the Tab key. The default is No. No: The radio stops scanning when the microphone is removed from the hook-switch bracket. Yes: The radio will not alter its scan when the microphone is removed 2 of 2 from the hookswitch bracket. The radio will either transmit on the receive channel or revert to selected channel depending on the programming of the Scan Transmit Channel.