COMPONENT MAINTENANCE MANUAL
AVIATION RECORDERS
Model FA5000
Rev. 03 Page 202
Feb. 27/13
FDR Function Testing & Fault Isolation
23–70
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Use or disclosure of information on this sheet is subject to
the restrictions on the cover page of this document.
C.
Recorder Test States
It is important to have a clear understanding of the FA5000 software operating states
and their indications that the FA5000CVDR can go through when simulating data to
the recorder in the testing environment. This paragraph briefly explains these states
and what to expect when switching modes. A more detailed theory of operation of
the FA5000 software operating states is provided in paragraph B. of the Description
and Operation section of this CMM.
NOTE:
To avoid producing an unintentional fault condition within
the recorder, the procedures contained herein must be
completely followed in the order presented.
If a problem occurs during a procedure that can not be cleared or an unexpected in-
dication appears during a test, back out of the procedure and begin again at a stable
state. (Typically, from the FA5000 Initialization Check starting in paragraph 2.B.).
(1)
FA5000CVDR Operating Mode States
The following operating states and time limits exist within the FA5000CVDR.
(a)
Initialization State
When power is applied to the FA5000CVDR with the Cross
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over cable at-
tached to the GSE connector, the FA5000 will always initiate in the “NOT
RECORD” mode of operation.
The recorder firmware will validate itself and issue a checksum value of
the Flight Data Processor (FDP) and Storage Management Processor
(SMP) located on the Main Processor (MP) PWA. This checksum value is
displayed on the ROSE Status Window under the Test Flight Recorder
menu.
Since no data is being received, a FAULT signal is asserted and sent to
ROSE where it is displayed in RED in the Status Window. The Data Type
and Data Frame Rate will also be initially displayed as UNKNOWN.
(b)
Record State
The Record State is initialized from the ROC/7 by first setting data type/
rate, then activating simulated data, then activating the Record function.
The simulated data is sampled and locked to the incoming bit rate (128 or
256 wps).
Once frame sync is achieved, the data is aligned into12-bit words match-
ing the frame structure (128 or 256). After verifying the frame and sub-
The document reference is online, please check the correspondence between the online documentation and the printed version.
