TK-8100H4OPERATING FEATURES1. Controls and Functions1-1. Front Panel1-2. Microphoneq w e r utyiq (Power) switchPress to switch the transceiver ON. Press and hold forapproximately 1 second to switch the transceiver OFF.w VOL / keys (left side)Press to increase or decrease the volume level.e DisplayRefer to right.r CH / keys (right side)Press to increase or decrease the channel number.t MON / SCN / / keysPF (Programmable Function) keys. Press each key to acti-vate its programmable function.y Microphone jackInsert the microphone plug into this jack.u SpeakerInternal speaker.i PTT switchPress this switch, then speak into the microphone to call astation.1-3. DisplayIndicator DescriptionAppears while transmitting.Appears when trunking is activated.Appears while monitoring the selected channel(squelch is off).Appears when making a call using CodeSquelch or Selective Call. Appears and blinkswhen receiving a Code Squelch call.Appears while scanning.Appears when the AUX port has beenactivated or when the Scrambler function hasbeen selected.Appears while using the Talk Around function.The selected channel is set as a Prioritychannel.The selected channel is added to the scanningsequence.Appears when a signal is detected on thecurrently selected channel.Appears when the transceiver keys have beenlocked, using the Key Lock function.Displays the currently selected group andchannel number, or the channel name.1-4. Rear PanelExternalspeakerjackPower inputconnectorAntennaconnector