Technical data

3-14
Quality
Statistical Reliability
Table 3-31 summarizes the MTBF for the Model 743.
.
Table 3-30 Model 744 VME Board Computer AFR Projections (%/Year)
Hardware Configurations
Projected
AFR (%/Yr.)
744 VME Board Computer with on-board graphics option 4.8
Memory 32 MB RAM card (one card using 16Mbit DRAM)
64 MB RAM card (one card using 16Mbit DRAM)
128 MB RAM card (one card using 64Mbit DRAM)
0.7
1.23
2.1
Option 8-Plane Color Graphics (GSC mezzanine card)
HCRX-8
HCRX-24
ATM
PMC Bridge
PMC Bridge and Expander
1.7
1.38
1.54
2.0
2.0
3.0
Table 3-31 Model 743 VME Board Computer MTBF (hr-MRBF) Computations
Hardware
(Includes Model 743 VME Board
Computer)
No On-Board
Graphics
MTBF (Hours)
On-Board
Graphics
MTBF (Hours)
16 MB RAM (one 16 MB
card using 4 Mbit DRAM)
186,000 160,000
32 MB RAM (one 32 MB
card using 16Mbit DRAM)
210,000 177,800
64 MB RAM (one 64 MB
card using 16 Mbit DRAM)
173,900 153,800
128 MB RAM (two 64 MB
cards using 16 Mbit
DRAM)
131,100 117,600
256 MB RAM (four 64 MB
cards using 16 Mbit
DRAM)
87,900 81,600