190-01561-00
GIA 6300 Installation Manual
Draft1
Page 6
5.2.1
Key Event Out
The Key Event Out active low discrete output signals that the GIA COM is transmitting. In installations
with more than 2 VHF COM radios, this input can be used to connect to the Transmit Interlock input on
the other radios.
5.2.2
RX Squelch Break
The RX Squelch Break active low discrete output/input signals that the RF squelch has broken on the
COM receiver. This output may be used in the future to hold off digital transmissions or to coordinate
two digital transmitters in a CSMA environment. This pin functions as both the input and output signal
for a single signal between all of the digital radios in the system: the two GIA 6300s and the GDR 66.
5.2.3
Emergency COM Operation
The Emergency COM Operation active low discrete input tunes the transceiver to the emergency
frequency, 121.500 MHz, when active.
5.3
NAV
Interface Description
Quantity
Comment
Analog Audio Output
1
5.4
Audio Panel
Interface Description
Quantity
Comment
Transceiver (I/O) Interface
3
Transceiver (I/O) / Microphone
Interface
4
Receiver Inputs
7
Alert Inputs
4
Crew Headset Outputs
2
Passenger Headset Outputs
2
Microphone Inputs
6
Music Inputs
2
AES3 Interfaces
2
Active Low Discrete Inputs
6
Active Low Discrete Outputs
7
Summed Audio Output
1
