71 PANEL DESCRIPTIONTX CODE CHANNEL UP/DOWN KEYSPush to directly select a TX code channel.SCRAMBLER/ENCRYPTION KEY➥ While in the analog mode, push to toggle the voice scram-bler function ON or OFF.➥ While in the digital mode, push to toggle the encryptiontransmission function ON or OFF.COMPANDER KEYPush to toggle the compander function ON or OFF.The compander function reduces noise components fromthe transmitted audio to provide clear communications.ID-MR SELECT KEY (PMR operation only)➥ Recalls detected ID codes.• Push this key, then select the ID code using [CH Up]/[CH Down].• Up to 5 ID’s are memorized.➥ Hold down for 1 second to erase the selected ID’s.HOOK SCAN KEYWhen the on hook scan function is activated, push this keyto disable the on hook scan function (stop scanning) tempo-rarily. Push this key again to resume the scanning.USER SET MODE KEY➥ Hold down for 1 second to enter the user set mode.• While in the user set mode, push this key to select an item that isenabled by your dealer, and change the value or condition using[CH Up]/[CH Down].➥ Hold down this key for 1 second again to exit the user setmode.10Key ENT KEYPush to enable the connected microphone's 10-keypad oper-ation.• The desired memory channel, TX code channel (5-Tone), ID listnumber (digital), TX status (MSK/Digital) or Short Data Message(digital) can be selected. (Depends on the pre-programming.)OPT 1/2/3 KEYSPush to control the output signal level from an optional unit.POWER OFF EMERGENCYWhile holding down this key, turn the transceiver’s power OFFto activate the Power OFF Emergency function.After the specified time period has passed, from the time thisfunction is activated, the emergency call is transmitted withno beep sound and no display indication. (p. 14)