User's Manual Part 1

T
2
CAS / Part No. 9000000
SYSTEM DESCRIPTION AND INSTALLATION MANUAL
34-43-20
15 Feb 2003
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1--30
The T
2
CAS also contains an access port on the front of the unit that accepts
a Type I Compact PC Flash card. The Compact PC card is commercially
available and can hold up to 300 Megabytes of memory. The Compact PC
card is electrically compatible with PCMCIA Flash cards and can be inserted
in a PCMCIA card slot on a PC using an adapter, or a USB serial port with
an adapter. The Compact PC Flash card is used for updating the
TAWS/RWS operational software and terrain database. In addition, the
Compact PC Flash card may be used as a data recorder for the purpose of
certification flight tests. T
2
CAS is designed so the Compact PC card may
remain inserted in the unit during flight tests.
3
TAWS Display interface
The TAWS function contains two Digital 453 picture bus outputs that transmit
terrain display data to ARINC 708A compatible weather radar displays or
EFIS displays. The bus outputs can be configured with independent range
selections. The Mode and Range selections are input to the system on an
ARINC 429 bus.
The TAWS function also has two ARINC 429 bus outputs that contain data
for alerts and annunciation of system status.
4
RS -- 232/ Compact Flash Card Data Recorder Interface
The Data Recorder Interface can utilized for either internal or external Data
recording.
The TAWS/RWS Event log contains event information due to TAWS or
Windshear cautions or warnings (internal Data recording). The log can hold
approximately three events that last up to 45 seconds each (assuming
GCAM Event, GCAM Parameter data and GFM parameter data selected for
recording). The event log data may be downloaded to a Laptop PC over the
RS -- 232 port, or downloaded to a Compact Flash card using the slot on the
front of the unit.
The external Data recording provides the capability to perform real--time
recording of various T
2
CAS input, output and internal data. This data may
be recorded using the Compact Flash Card or RS --232 interface. Using a
300Mbyte Compact Flash card, the system can store up to 15 hours of flight
test data.
In addition, the RS--232 interface allows for LRU maintenance and
troubleshooting. The maintenance log and RA event log can also be
downloaded to a PC using this port. The RS-- 232 interface is connected to
the 53--pin PDL connector on the front of the unit.