COMPONENT MAINTENANCE MANUAL
AVIATION RECORDERS
FA2100CVR
Rev. 15 Page 34
Apr. 14/16
Description and Operation
23–70–04
Use or disclosure of information on this sheet is subject
to the restrictions on the cover page of this document.
* Only for P/N 205E2503
−
01 and 205E1763
−
08.
The ARINC 557/757 Aircraft Interface provides output signal conditioning for:
CVR Fault
Audio Out for Monitoring at the Control Unit headset.
Data Link and OMS (Only for P/N: 205E2503
−
01 and 205E1763
−
08)
The Aircraft Interface also includes the storage supply portion of the power supply.
This supply conditions the applied ac or dc input power and charges the 39 Vdc stor-
age capacitor to provide the energy required to operate the Cockpit Voice Recorder
during power outages up to 200 milliseconds in duration.
(1)
ARINC 557/757/757A Aircraft Interface Signals to Aircraft Interface PWA
Table 3 lists the ARINC 557/757/757A aircraft interfaces to the FA2100CVR Aircraft
Interface PWA.
Table 3. ARINC 557/757/757A Aircraft Interface Signals
Signal Name
Description
115 AC IN (HOT, COLD)
Ac input power as defined in RTCA/DO–160C, Section 16.
AUDIO OUT (HI, LO)
Combined high quality voice and CAM channels to provide au-
dio monitor output. With the reference signal applied to one
channel, the output level is 2.45 Vrms
$
30% into a 600 ohm
load (350
−
400 mVrms into an 8 ohm load for the
−
93 configura-
tion).
RECORD ON
(A, B)
CVR is in Record Mode when A and B are jumpered. A is
grounded internally.
28 VDC POWER IN
DC input power as defined in RTCA/DO–160C, Section 16.
STOP RECORDING
Recorder stops recording voice and flight data within 10 min-
utes after this pin is grounded. Recording resumes when
ground is removed.
PUSH TO TEST
A ground of this input initiates the BIT test tone sequence.
PRE AMP PWR OUT
(HOT, GND)
+18
$
2 Vdc output for control unit. Maximum operating current
is 25 ma. Short circuit limited at approximately 30 ma.
TEST INDICATOR
(P,N)
Provides 1 ma output into 100 ohms if the PUSH TO TEST
function passed (+12 V
$
5% through 11.94 kohms
$
1%).
TEST INDICATOR N is grounded internally. (Not used in
GACVR models.)
CHASSIS GND
Chassis, power, and signal ground.
CVR FAULT OUT
CVR fault output signal. Open indicates fault, ground indicates
no fault.
The document reference is online, please check the correspondence between the online documentation and the printed version.
