User Manual

OPERATION AND INSTALLATION MANUAL
KVJEVR718
Enhanced VHF Radio
EVR716
23-11-02
Page 40-1
2000/02/15
OPERATING INSTRUCTION
1. Energization of the Equipment
The EVR716 transceiver is not provided with an "ON-OFF" switch. The EVR716 transceiver
starts operating as soon as 28 VDC is applied to the connector of the EVR716 unit.
2. Normal Operating Modes
The EVR716 transceiver is not provided with operating buttons. It operate via the aircraft
controls.
A. Operational State
This is the EVR716 transceiver normal operating. A BITE device initializing the cyclic tests
allows checking operation of the EVR716 transceiver and indicating failures.
B. Modes
(1)Operating Modes
The operating modes are the following:
(a) Mode 0A
− 25 kHz analog voice transmission (ED-23B, DO-186A : receiver class C,
transmitter class 3; ARINC 716).
− RF modulation : Amplitude modulation with double side bands.
− 25 kHz channelling.
− Link with the microphone : normal audio input/output.
(b) Mode 0B
− 8.33 kHz analog voice transmission (ED-23B, DO-186A : receiver class E,
transmitter class 5; ARINC 716).
− RF modulation : Amplitude modulation with double side bands.
− 8.33 kHz channelling.
− Link with the microphone : normal audio input/output.
(c) Mode 1A
− Data transmission with modem outside the transceiver. ACARS protocol
(ARINC 716, ARINC 618).
− RF modulation : Minimum Shift Keying Amplitude Modulation
(MSK-AM).
− Channelling : 25 kHz.
− Rate : 2.4 kb/s.
− Access to the CSMA : non-persistent.
NOTE : This modem function is performed by the (C)MU)
− Link with the (C)MU : twisted pair analog signal.