(b)
A BITE indicator provides an indication of the health of the SSCVR. If the SSCVR detects a fault which requires removal of the unit from the aircraft installation, the BITE indicator will activate and will remain activated until repair is accomplished. The BITE indicator remains inactive in all other cases.
(2)
Inside the recorder:
R **ON A/C 001-049, 062-099, 101-149, 151-199, 201-299, 301-399, 401-499,
(Ref. Fig. 006)
1EFF : ALL 1 23-71-00Page 11 1 1 Aug 01/05 1 1 1CES 1
SSCVR - Component Description
Figure 006
R 1EFF : 001-049, 062-099, 101-149, 151-199, 1 23-71-00Page 12 1201-299, 301-399, 401-499, 1Aug 01/05 1 1 1CES 1
R CVR - Component Description
R Figure 006A
R 1EFF : 051-061, 1 23-71-00 Page 13
1 1 May 01/05
1 1
1CES 1
R Solid State Cockpit Voice Recorder - Face Figure 007
1EFF : 1 1 1CES ALL 1 111 23-71-00 Page 14 May 01/05
**ON A/C 051-061,
(Ref. Fig. 006A)
**ON A/C ALL
(Ref. Fig. 008)
(a) The SSCVR consists of three Shop Replaceable Units (SRUs) (not including the basic system chassis):
-Controller Board A1 (interface and Control) The interface and Control board is a single circuit card which controls all states and modes of the system performing the record, erase and test functions of the system. The interface and control board provides all functional interfaces to external systems.
-Crash Survivable Memory Unit (CSMU) The CSMU is a solid state, nonvolatile mass storage device enclosed in a protective case. The crash survivable memory unit provides storage for all input data.
-Power supply converts either 115VAC 400Hz or 28VDC aircraft power into secondary power for Shop Replaceable Units (SRUs) and provides power on reset and power failure monitoring.
7. Operation
_________
A. Recording
(Ref. Fig. 008)
R **ON A/C 001-049, 062-099, 101-149, 151-199, 201-299, 301-399, 401-499,
B. Recording Channels The recording system consists of four recording channels which simultaneously record audio as follows: Channels 1, 2 and 3 have a narrow band and allow the recording of signals from the Captain, First Officer and 3rd Occupant via the Audio Management Unit 1RN. Channel 4 has a wide band and allows the recording of the ambient noises picked up by the area microphone and fed via a pre-amplifier to the input transformer for channel 4. The three narrow band channels are recorded separately during the first 30 min. and are mixed together from 30 min. to 120 min. The recordings are made on the crash protected memory which provides a 120 min. maximum record interval of continuous operation.
1EFF : ALL 1 23-71-00Page 15 1 1 Aug 01/05 1 1 1CES 1
R Cockpit Voice Recorder - Operation Figure 008
1EFF : 1 1 1CES ALL 1 111 23-71-00 Page 16 May 01/05
The main function of the SSCVR is to record audio digital communications
data and Timing data into the CSMU.
NOTE : The SSCVR is synchronized with the 2nd aircraft recorder (SSFDR)____
by means of an audio signal corresponding to the GMT sent by the
FDIU to the audio system and received by the SSCVR on the third
occupant channel.
R **ON A/C 051-061,
R B. Recording Channels
R The recording system consists of four recording channels which
R simultaneously record audio as follows:
R Channels 1, 2 and 3 have a narrow band and allow the recording of signals
R from the Captain, First Officer and 3rd Occupant via the Audio Management
R Unit 1RN.
R Channel 4 has a wide band and allows the recording of the ambient noises
R picked up by the area microphone and fed via a pre-amplifier to the input
R transformer for channel 4.
R Each channel feeds data to separate solid state memory.
R The recordings are made on the crash protected memory which provides a 30
R min. maximum record interval of continuous operation.
R The main function of the SSCVR is to record audio digital communications
R data and Timing data into the CSMU.
R NOTE : The SSCVR is synchronized with the 2nd aircraft recorder (SSFDR)____
R by means of an audio signal corresponding to the GMT sent by the
R FDIU to the audio system and received by the SSCVR on the third
R occupant channel.
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