TK-81504OPERATING FEATURES1. Controls and Functions1-1. Front Panelq w e r!0t y u oi !1 !21-2. Microphone!3q Volume ControlRotate to adjust the volume level. Clockwise increasesthe volume and counterclockwise decreases the volume.w Display(See right.)e SelectorRotate to select a Zone or CH/GID (channel/group ID).Clockwise increases the Zone / CH/GID and counterclock-wise decreases the Zone / CH/GID. The default setting isCH/GID Up/Down.r (Power) switchPress to switch the transceiver ON. Press and hold forapproximately 1 second to switch the transceiver OFF.t Microphone JackInsert the microphone plug into this jack.y PF1 KeyPress this key to activate its programmable auxiliary func-tion. The default setting is Zone Up.u PF2 KeyPress this key to activate its programmable auxiliary func-tion. The default setting is Zone Down.i PF3 KeyPress this key to activate its programmable auxiliary func-tion. The default setting is None.o PF4 KeyPress this key to activate its programmable auxiliary func-tion. The default setting is None.!0 PF5 KeyPress this key to activate its programmable auxiliary func-tion. The default setting is None.!1 PF6 KeyPress this key to activate its programmable auxiliary func-tion. The default setting is None.!2 TX / BUSY LEDsThe TX LED lights red while transmitting. In ConventionalGroups, the BUSY LED lights green while receiving.!3 PTT switchTo transmit, press and hold this switch, then speak intothe microphone. Release to receive.1-3. DisplayIndicator DescriptionDisplays the zone, group ID, and channelnumbers. Also displays various functionswhich have been programmed by your dealer.CALL Appears when the squelch opens during a2-Tone or DTMF call.MON Appears when the key programmed asMonitor is pressed.Appears when the selected Zone is added to(left side) the scan list.SCN Appears when you are using Scan mode.SP Appears when you are using an externalspeaker.OP Appears when the optional scrambler boardis installed and activated.Appears when the selected Channel/Group(right side) ID is added to the scan list.A Appears when the auxiliary A function isactivated.B Appears when the auxiliary B function isactivated.OS Appears when Operator Selectable Tone isactivated.Appears when a FleetSync message isstored in the transceiver memory. Appearsand blinks when a new message is received.Displays the zone, group ID, and channelnumbers. Your dealer can program the zone,group ID, and channel names with up to 12characters, in place of numbers.1-4. Rear PanelSCN SP OP OSA BMONCALLPower inputconnector6-pin connector(for accessories)25-pin connector(for accessories)Antennaconnector