Model FA2100CVR
Installation & Operation
Instruction Manual
Page 8
Rev. 16
165E1846-00
16
CVR DataLink Recording Failure
NO
NO
NO
17
Clock Status
NO
NO
NO
18
Data Link Input Interface
NO
NO
NO
19
CVR Record Enable (Pins 7/8)
NO
YES
YES
20**
RIPS Maintenance Status (Battery)
(Pin 38)
NO
NO
NO
21
RIPS Active Status (Pin 10)
NO
NO
NO
22
RIPS Presence Status (Pin 42)
NO
NO
NO
26*
RIPS Maintenance Status (Battery)
(Pin 38)
NO
NO
NO
27*
RIPS Fault Status (Pin 29)
NO
NO
NO
* Applicable to the Model 2100-1025-24 only.
** Not applicable to the Model 2100-1025-24.
It is important to note that certain CVR faults can only be detected through the “Push
−
to
−
Test” function.
This commanded BITE provides the only test of the CVR audio input circuits. During the Push
−
to
−
Test
operation, the CVR generates a test tone and sequentially injects it into each of the four audio input chan-
nels. A CVR fault will be asserted if the tone amplitude or frequency is not correctly detected. Like any
other internal CVR fault, this audio circuit failure will be reported using: the Label 350 output Bit 11, the
CVR Fault Status discrete output, and the Push
−
to
−
Test results. If an audio input circuit failure occurs
after a successful Push
−
to
−
Test operation, it will not be detected, or reported, until the next Push
−
to
−
Test
is initiated. This audio input circuit failure is the only fault that would not otherwise be detected and re-
ported by the CVR continuous BITE. Push
−
to
−
Test results are reported, during the test, using the CVR
Test Indicator output (Pins 15/16) which is usually connected to an indicator lamp or meter on the CVR
Control Unit. In addition, CVR failures reported through the Push
−
to
−
Test operation will be indicated by
muting of the CVR Monitor Audio output (Pins 5/6).
The fault criteria used to determine the reporting status associated with the CVR Label 350 Status Word
bits are summarized in Table 6.
Table 6. CVR STATUS WORD FAULT REPORTING CRITERIA
TABLE 6
CVR STATUS WORD FAULT REPORTING CRITERIA
L350
BIT
N°
FUNCTION
FAILURE CRITERIA
11
CVR Status (Audio Recording
Failure)
Any internal CVR failure that prevents correct recording of
the audio inputs (including CU failure and Push-to-Test au
dio input circuit failure). May relent depending on fault
severity.
12
CMC Bus Status (OMS Input)
Loss of OMS input Heartbeat (valid Label 227 input) for
more than 3 seconds. Relents if OMS Heartbeat is restored.
13
CVR Control Unit Failure
Loss of 18 VDC Control Unit supply voltage. Relents if
voltage level returns.
14
FDR Status (not used)
Always reported as ‘Failed’ in CVR only recorder.
15**
RIPS Fault Status (Pin 29)
RIPS Fault as reported on pin 29 input (if present).
