Northern Airborne Technology CC250 - Manual (Page 44)

CC450-0V2 Communications Controller
Installation and Operation Manual
3.3.2
Transceiver Controls
3.3.2.1 Transceiver Switches
A transceiver is selected for control at the CC450-0V2 by putting the respective Transceiver Switch in the
up (ACTIVE) position.
Do not select transceivers that are turned OFF and do not select positions that do not have transceivers
connected. Improper operation of all modes will occur if these transceivers are selected.
3.3.2.1
Transceiver Annunciators
Each transceiver has one annunciator to indicate the status of the transceiver. When the CC450-0V2 is
ON, and the transceiver is transmitting, the annunciator will light GREEN. When the transceiver is
receiving a signal, the annunciator will light ORANGE. If the transceiver is turned off, the annunciator
may light orange, as the Squelch Disable line from the transceiver will float to an unknown level. The
CC450-0V2 will recognize this level as an active Squelch Disable signal.
3.3.3 Mode Selection Switch
There are three operating modes for the CC450-0V2, selected by the Mode Selection switch.
3.3.3.1 RELAY Mode
With the Mode switch in the 'up' position, the CC450-0V2 is in the RELAY mode. In this mode, the
received audio signal from any selected transceiver is transmitted out on the other selected
transceiver(s). Transmission of microphone audio is as selected by the Audio Controller.
If the microphone is keyed (PTT button pressed) for a transceiver that is transmitting a relayed audio
signal, then that transceiver is taken out of the relay for the duration of the microphone key. If the
microphone is keyed (PTT button pressed) for a transceiver that is receiving an audio signal to be
relayed, then the relay is stopped.
3.3.3.2 SIMULCAST Mode
With the Mode switch in the DOWN position, the CC450-0V2 is in the SIMULCAST mode.
In SIMULCAST mode, receive audio signals are not transmitted. Microphone audio is transmitted out on
the transceiver as selected by the Audio Controller. If the switch on the CC450-0V2 is used to select that
transceiver, then the microphone audio is transmitted on all transceivers selected at the CC450-0V2.
Page 3-2 Issue 1 Section 3 Rev: 1.00
ENG-FORM: 806-0110.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.