3.1 F RONT P ANEL P OWER AND A UDIO C ONTROLS The front panel contains the power on/off switch which is a black push button switch. When pressed the Unscrambler powers on and the LCD display will illuminate. Next to the power on/off switch is a jack socket fora supervisor headset and the speaker power switch. The speaker switch will illuminate with a blue LED when the speaker is on. The supervisor headset (CO) can be plugged into the ¼” jack socket on the front panel of the unscrambler. The supervisor headset and diver headsets are not to be mistaken as being the same. Only the supervisor headset with a ¼” jack plug can be used on the front panel. The below image shows the jack which is on the supervisor headset. Fig 3.1 Headset Jack Connections Table 3.1 Headset Jack Connections The speaker can be switched on when the headset is in use and the audio from the divers will be audible from the speaker. When supervisor round robin is switched on the supervisors audio will also be audible from the speaker. The top section seen in Fig 3.2 shows the supervisor and diver round robin switches. When supervisor round robin is switched on this will allow supervisor to diver communications without the use of the PTT switches. When the diver round robin is switched on the divers will be able to communicate with one another. When diver round robin is on, comms are open between Channel 1, Channel 2 and Channel 3. Each channel has its own dedicated round robin volume control.