Kenwood TH-78A Instruction Manual

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Page 413) Connect your earphone to the External Speaker jack.4) Set the volume to a comfortable level.NoteIf you perform this operation, the internal speakervolume is also reduced. If you stop using theearphone, repeat step 1 to return to the originalvolume settings.7 Switching speaker output when a speaker-microphone is connectedIf you connect a speaker-microphone to the external speaker jack, you will hear the mixed receive tones of theVHF and UHF bands from the speaker- microphone. These tones can be separated to the transceiver's internalspeaker and the speaker- microphone.1) Press the F key then the 6 key.You will hear the receive audio of the active band from the speaker-microphone and the receive audio of thesub-band from the internal speaker.2) If you want to change the speaker output, press and hold the F key for longer than one second, then press the6 key.8 Automatic Band Change FunctionThe Automatic Band Change function automatically switches transmit control from the RX/TX band to the RX onlyband whenever a signal is received that opens squelch on the RX only band.1) Press the F key, then press the BAND/A.B.C. key within 10 seconds.The A B C indicator displays.2) If a signal comes in on a RX-only band and the BUSY indicator lights, the PTT indicator lights for the receive-only band.3) If you now press the PTT switch, the A.B.C. function turns off, and you can respond to the call from the otherparty.NoteWhen the incoming signal drops out three seconds the PTT indicator will return to the previouslySelected position.9 Simultaneous Receive Function of Two Signal in the Same BandThis transceiver has been factory-programmed to receive one VHF signal and one UHF signal at the same time. Itis also possible to receive two signals in the same band at the same time. While displaying the same band, twodifferent signals can be selected.