BENDIXKing 700-00179-700, Installation Manual

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89000046-014 KSN 780/8XX/900 AeroNav AML STC Installation Manual for Helicopters
Rev 0 Page 6-14
© Honeywell International Inc. Do not copy without express permission of Honeywell.
6.1.12 Com/VOR/ILS Audio Electrical Characteristics
Note: This section is N/A for AeroNav 880/780.
6.1.12.1 Com Microphone Key
Description Connector Pin Signal Type
COM MIC Key
P1002 4
Input
Table 55 VHF Communication Microphone Key
This input is active if either the voltage to ground <1.9V or the resistance to ground is <375 Ω . 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.
6.1.12.2 Com Microphone Audio, INTERCOM Microphone Audio
Description Connector Pin Signal Type
COM MIC Audio HI
P1002 6
Input
COM MIC Audio LO
P1002 18
Input
INTERCOM MIC HI
P1002 5
Input
INTERCOM MIC LO
P1002 17
Input
Table 56 VHF Communication Audio
520 Ω input impedance, supply 9V via 620 Ω .
6.1.12.3 Com Audio, VOR/ILS Audio
Description Connector Pin Signal Type
Com Audio HI
P1002 7
Output
Com Audio LO
P1002 19
Output
VOR/ILS Audio HI
P1006 16
Output
VOR/ILS Audio LO
P1006 17
Output
Table 57 VHF Communication and Navigation Audio Output
Each supply 65mW into 150 Ω . They are balanced outputs and LO output must be connected.
6.1.12.4 Discrete Inputs
Description Connector Pin Signal Type
Transmit Interlock (Unused)
P1002 14
Input
Com Remote Transfer
P1002 15
Input
VLOC Remote Transfer
P1006 28
Input
Com Remote Recall, Forward
P1001 74
Input
Com Remote Recall, Reverse
P1001 75
Input
Table 58 VHF Communication and Navigation Switch Inputs
This input is active if either the voltage to ground <1.9V or the resistance to ground is <375
Ω
. This
input is considered inactive if the voltage to ground is 11-33 VDC.
COM Remote Transfer and VLOC Remote Transfer are momentary inputs. Momentarily depressing
the VLOC or Com Remote transfer button toggles the active and #1 standby frequencies.
Momentarily depressing the COM Remote Recall button inserts the next frequency in the Com preset
list into the #1 standby slot.