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Figure 6-3. Random Vibration PSD
6.3.1.2
Shock Test Procedure
Recommended performance requirement for a motherboard:
Quantity:
total 18 drops).
Profile:
Setup:
Figure 6-4. Shock Acceleration Curve
58
0.1
(20, 0.02)
(5, 0.01)
0.01
5 Hz
0.001
1
10
3 drops for + and - directions in each of 3 perpendicular axes (i.e.,
50 G trapezoidal waveform, 170 in/sec minimum velocity change.
Mount sample board on test fixture.
60
A
c
50
c
e
l
40
e
r
30
a
t
20
i
o
10
n
(g)
0
0
2
ATX Thermal/Mechanical Design Information
3.13GRMS (10 minutes per axis)
100
Frequency (Hz)
4
6
8
Time (m illiseconds)
Thermal and Mechanical Design Guidelines
(500, 0.02)
500 Hz
1000
10
12
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