L3 FA5000 Component Maintenance Manual With Illustrated Parts List page 60

AI AIRCRAFT INTERFACE
J1 SIGNAL NAME
PIN
3 ATE PRESENT
4 AUDIO OUTPUT
(MONITOR) ­ HIGH
5 ERASE CVR INPUT A
6 ATE ETHERNET RX (­)
7 ATE ETHERNET RX (+)
8 CHANNEL 1 INPUT LOW
9 CHANNEL 1 INPUT HIGH
10 AUDIO OUTPUT
(MONITOR) ­ LOW
11 ERASE CVR INPUT C
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AVIATION RECORDERS
COMPONENT MAINTENANCE MANUAL
Model FA5000
I/O FUNCTION
IN ATE PRESENT controls Record Enable and CVR
Replay Inhibit/FDR Inhibit functions. When ATE is
not detected, all recording is enabled and CVR
Replay is disabled and FDR Inhibit is inactive.
When ATE is connected, all recording is disabled
and CVR Replay is enabled and FDR Inhibit is
active. Shunt discrete input; ARINC 573 compli­
ant.
GND = ATE CONNECTED/ALL RECORDING
DISABLED/CVR REPLAY ENABLED/ FDR
INHIBITED
OPEN = ATE NOT CONNECTED/ ALL
RECORDING ENABLED/ CVR REPLAY
DISABLED/FDR NOT INHIBITED
OUT Summed audio output signal from channels 1, 2,
and 3 for monitoring audio information that is be­
ing stored. Single ended. 600 ohm, 10 mW, short
circuit protected; ARINC 757­4. With the reference
signal applied to one channel, the output level is
2.45 Vrms ±30% into a 600 ohm load.
IN Bulk erase signal from the flight deck push to
erase switch. Bulk Erase initiates when
VOICE_ERASE_A is connected to
VOICE_ERASE_C for 2 seconds and interlock
circuits are closed (ARINC 757­4 and ED56A).
Diode isolated series discrete input (ARINC 717).
The OFF threshold is less than 3VDC. ON
threshold is greater than 18VDC. Sink current is
860uA at 18.1VDC.
GND = NO ERASE
Vsupply (t > 2s) = ERASE
IN 10/100BaseT/TX Ethernet RX+ and RX­ differen­
tial pair; IEEE803.3­2002. Used for integrated auto
IN
test with results display.
IN Channel 1 audio differential signal low; 150 Hz to
3.5 kHz bandwidth, 3V RMS maximum. Imped­
ance 5K ohm minimum.
IN Channel 1 audio differential input signal high; 150
Hz to 3.5 kHz bandwidth, 3V RMS maximum. Im­
pedance 5K ohm minimum.
OUT Signal ground return / reference signal for Audio
Monitor Output HIGH. Single ended from Main
PWA; referenced to AI PWA signal ground.
OUT Output to aircraft external Bulk Erase interlock
circuitry. Used with ERASE CVR INPUT A. Output
is +19VDC, diode isolated, through 1k ohms.
23–70−40
Description and Operation
Initital Issue Page 18
Rev.04 Page 18
Sep. 30/11
May 14/13