Com/Vor/Ils Audio Electrical Characteristics - Avidyne IFD540 Installation Manual

6.1.9 Com/VOR/ILS Audio Electrical Characteristics

6.1.9.1 Com Microphone Key
Description
COM MIC Key
This input is active if either the voltage to ground <1.9V or the resistance to ground is <375 .
This input is considered inactive if the voltage to ground is 11-33 VDC.
Activating the COM MIC Key will cause the transmitter to transmit the audio on the COM
MIC Audio HI.
6.1.9.2 Com Microphone Audio, INTERCOM Microphone Audio
Description
COM MIC Audio HI
COM MIC Audio LO
INTERCOM MIC HI
INTERCOM MIC LO
520 input impedance, supply 9V via 620 .
6.1.9.3 Com Audio, VOR/ILS Audio
Description
Com Audio HI
Com Audio LO
VOR/ILS Audio HI
VOR/ILS Audio LO
Each supply 65mW into a 150 load. These are balanced outputs and the LO output must be
connected.
6.1.9.4 Discrete Inputs
Description
Transmit Interlock (Unused)
Com Remote Transfer
VLOC Remote Transfer
Com Remote Recall
600-00299-000
Table 39: VHF Communication Microphone Key
Table 40: VHF Communication Audio
Table 41: VHF Communication and Navigation Audio Output
Page 66 of 198
IFD5XX Installation Manual
Connector Pin
P1002 4
Connector Pin
P1002 6
P1002 18
P1002 5
P1002 17
Connector Pin
P1002 7
P1002 19
P1006 16
P1006 17
Connector Pin
P1002 14
P1002 15
P1006 28
P1001 74
Signal Type
Input
Signal Type
Input
Input
Input
Input
Signal Type
Output
Output
Output
Output
Signal Type
Input
Input
Input
Input
Revision: 02