TK-81027■ SP UnmuteYou can select the type of SP Unmute system for eachchannel. The selection is as follows.Carrier, QT/DQT:Channel with this option will not check ID Code in order toopen its speaker.Carrier+DTMF, QT/DQT+DTMF:Channel that is set with this option will have to check forID Code in order to open its speaker.Default:Carrier, QT/DQT.SP unmute Channel setting RX condition SpeakerQT/DQT DTMF conditionCarrier None None Carrier SoundsYes Carrier SoundsCarrier+DTMF SoundsCarrier+DTMF None Yes Carrier Not SoundsCarrier+DTMF SoundsQT/DQT Yes None Carrier Not SoundsCarrier+QT/DQT SoundsYes Carrier Not SoundsCarrier+QT/DQT SoundsCarrier+QT/DQT+DTMF SoundsCarrier+DTMF Not SoundsQT/DQT+DTMF Yes Yes Carrier Not SoundsCarrier+QT/DQT Not SoundsCarrier+QT/DQT+DTMF SoundsCarrier+DTMF Not SoundsNote :When QT/DQT is not used, QT/DQT and QT/DQT+DTMFcan not be selected.When DTMF is not used, Carrier+DTMF and QT/DQT+DTMF can not be selected.■ Auto ResetIf option signalling matches a group set up with option sig-nalling, option signalling is released. After matching optionsignalling, option signalling will temporarily reset automati-cally.■ StunIf the stun code matches, a predetermined action will oc-cur. Whether option signalling is activated or not, when stunmatches on any channel, the transceiver will become TX in-hibited or TX/RX inhibited. While stun is active, if the stuncode + “#” code is received, stun will deactivate.When stun matches, transpond will function. Alert willnot be output.7. Audible User Feedback TonesThe transceiver outputs various combinations of tones tonotify the user of the transceiver operating state.Refer to the help file on the KPG-70D, regarding the func-tions that are not listed below.■ Stun on toneWhen a stun code is received, transpond tone sounds.■ Stun off toneWhen a stun release code is received, transpond tonesounds.■ Group call toneSounds when a group call with the correct DTMF optionsignalling is received, repeats 7 times. You can select yes orno in the Alert tone level setting.■ Individual call toneSounds when an individual call with the correct DTMF op-tion signalling is received. You can select yes or no in theAlert tone level setting.■ Key input error toneSounds when a key is pressed but that key cannot beused. You can select yes or no for the optional feature'swarning tone.■ Transpond toneSounds when an individual call with the correct DTMF op-tion signalling is received. For group calls, only the grouptone will sound, not the transpond tone.■ Pre alert toneSounds prior to the TOT TX inhibit activation. If TOT prealert is set, the tone sounds at the amount of time pro-grammed, before the TOT expires (TOT time – TOT pre alerttime = Pre alert tone sounding time). You can select yes orno for the optional feature’s warning tone.■ Transmit protectionThe power module is protected against heat while trans-mitting by making the radio cuts down TX power when thetemperature of the power module becomes higher than ref-erence. After that, if the temperature continue to rise, trans-mission is stopped. The power module is also protectedagainst over voltage by having the radio to check that the volt-age of power supply connected to the radio is not higher thanabout 17V when the radio is turned on, otherwise it can nottransmit. In both cases when transmission is stopped, abeep will continue to sound until the PTT key is released.OPERATING FEATURES