Intel BOXDB43LD - B43 Chipset Executive Series, Руководство пользователя, Страница: 61 / 92

Technical Reference
61
For information about Refer to
Processor datasheets and specification updates Section 1.2, page 14
Intel B43 Express chipset datasheets, specification updates,
and design guides http://www.intel.com/products/chip
sets/index.htm
2.7 Reliability
The Mean Time Between Failures (MTBF) prediction is calculated using component and
subassembly random failure rates. The calculation is based on the Bellcore Reliability
Prediction Procedure, TR-NWT-000332, Issue 4, September 1991. The MTBF
prediction is used to estimate repair rates and spare parts requirements.
The MTBF data is calculated from predicted data at 55 ºC. The Intel Desktop Board
DB43LD MTBF is 132,790 hours.
2.8 Environmental
Table 29 lists the environmental specifications for the board.
Table 29. Intel Desktop Board DB43LD Environmental Specifications
Parameter Specification
Temperature
Non-Operating -20 ° C to +70 ° C at 95% humidity
Operating 0 ° C to +50 ° C at 90% humidity
Shock
Unpackaged 50 g trapezoidal waveform
Velocity change of 170 inches/second²
Packaged Half sine 2 millisecond
Product weight (pounds) Free fall (inches) Velocity change
(inches/sec²)
<20 36 167
21-40 30 152
41-80 24 136
81-100 18 118
Vibration
Unpackaged 5 Hz to 20 Hz: 0.01 g² Hz sloping up to 0.02 g² Hz
20 Hz to 500 Hz: 0.02 g² Hz (flat)
Packaged 10 Hz to 40 Hz: 0.015 g² Hz (flat)
40 Hz to 500 Hz: 0.015 g² Hz sloping down to 0.00015 g² Hz