Nat ACP51-100 Installation And Operation Manual
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ACP51-100 DACS Audio Control PanelSM81 Installation and Operation ManualSection 3 Rev: 1.00 Issue 1 Page 3-43.3.7 Transmit Selector SwitchICSPTT ICSPTTENG-FORM: 806-0113.DOTCONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.3.3.8 TX/ICS PTT SwitchTXICSTXICSThe Transmit (TX) Selector is a nine position rotary switch used to select thetransceiver for transmission. For additional information see section 3.3.13.When the TX Selector switch is turned fully ccw, it will be aligned with the ICSposition. Each of the other positions will align with one of the selectabletransceivers.3.3.9 RX/ICS Volume ControlICSRX ICSRXThe TX/ICS PTT switch is a momentary centre-off toggle switch, labelled ICS and TX.When the ICS/TX switch is held in the ICS position, the ACP51 will key the ICS for allusers assigned to the ACP.When the ICS/TX switch is held in the TX position, the ACP51 will key the transceiverselected by the TX selector switch, and will route the audio from the microphones of allusers assigned to the ACP to the transceiver.3.3.10 ISO/CALL ButtonISOCALLISOCALLThe master RX/ICS Volume control is a dual concentric knob. The upper (inner) knobcontrols the ICS volume potentiometer, and the lower (outer) knob controls the masterreceive volume for the unit.Rotating the ICS knob cw will increase the ICS volume, and ccw will decrease the volume.The master RX pot affects all Transceiver receive volumes. All receive volumes are reducedby 75% when it is rotated fully ccw, and increased proportionally as it is rotated cw. Whenrotated fully cw, the master RX volume is set to maximum.The ISO/CALL button is a momentary push-button switch that can be used to enter ISOmode (Crew only), or to call the crew when in isolation (ISO) mode.Isolation means that the normal intercom audio communications path is temporarilysuspended. Isolation has no effect on any other audio source.3.3.10.1 Crew/Passenger Talk GroupsNote: Confirm the specific criteria associated with this installation with your installing agency.The communications management system provides the ability to decide which ACPs will be designatedas crew during ISO. Typically, up to three ACPs can be designated as crew (i.e. the users assigned tothose ACPs are members of the crew talk group) - all others are designated as passenger. Members ofthe crew talk group can use the ISO/CALL button located on their Audio Control Panel to initiate andcancel the talk group selection (ISO mode). On the passenger Audio Control Panels, the same buttonacts as a CALL button. |
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