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SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
9
End Of List Message
a
H. Miscellaneous BITE Requirements
(1) The typical retention period for the BITE memory is at least five years at 25 °C. The
worst case retention period is at least one year at 50 °C. If batteries are used to
supply backup power for the BITE memory, the typical battery lifetime should be at
least 10 years at 25 °C. The worst case lifetime is at least two years at 50 °C.
(2) Each system LRU has a total on-time clock (TOTC) to accumulate and record the
amount of time the LRU has been powered up. The TOTC has a 10 minute
resolution, and is capable of accumulating and recording a count of at least 200,000
hours.
(3) The TOTC value is capable of being examined, and of being reset to 0:00 through
the CMT. Any manual TOTC reset, or any automatic TOTC reset (e.g., upon
detection of corruption of its value), results in an automatic entry of the event into the
LRU failure memory log and the SDU system failure memory log. The TOTC hours
are capable of being automatically entered into the LRUs maintenance activity log.
I.
Maintenance Activity Log
(1) A maintenance activity log is stored in each system LRU. The maintenance activity
log is made up of the six most recent maintenance activity records (MAR). Each MAR
can be entered through the CMT. Information is stored in the MAR as shown in
Table 6-7 and in the order listed.
Field
Document Number
Date (yymmdd)
Location
Phone Number
Total On-Time Clock (Hours)
Honeywell International Inc. Do not copy without express permission of Honeywell.
MCS--4200/7200 Multi--Channel SATCOM System
Where "XXX" represents the numeric display of the actual SDU
temperature in degrees Celsius, with a (--) sign or space as appropriate
for negative and positive values. The "XXX" field will have leading zeros
replaced by spaces.
The END OF LIST message is displayed at the end of the display list
after the ORT identification.
Table 6-7. MAR Information
Size
16 ASCII Characters
6 ASCII Numerics
32 ASCII Characters
18 ASCII Numerics
6 ASCII Numerics
a--z, A--Z, 0--9
yy 00--99
mm 01--12
dd 01--31
a--z, A--Z, 0--9
0--9
0--200,000
23- -20- -35
Range
Page 6--20
15 Jul 2006
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