User Manual Part 1

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release the transceiver, press the button and at the same time push the transceiver rearward. The
key locks the button so that it cannot be pressed.
2.10 HANDHELD CONTROL UNIT INSTALLATION
2.10.1 GENERAL
The Handheld Control Unit replaces the standard control unit and DTMF microphone in remote
mount applications. It does not contain an internal speaker, so an external speaker must be used.
This control unit plugs directly into the remote control unit pigtail cable on the back of the
transceiver or into an optional junction box. This junction box provides the following additional
jacks (see Figure 2-10).
Figure 2-10 HHC Installation Components (Optional Junction Box Used)
Speaker Out Jack - Output for connecting an external speaker. When the junction box is not
used, the speaker is connected to the accessory pigtail of the transceiver.
Line Out Jack - Connection point for a tape recorder or some other device. The output signal at
this jack is 1 V peak-to-peak, 600-Ω (nominal), and consists of composite receive and transmit
audio.
Earphone/Microphone Jack - A three-conductor jack for connecting a combination earphone
and microphone. The external speaker audio is automatically muted when this jack is used. There