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DrQuine
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re: Computer swap on Mars rover
DrQuine   3/13/2013 1:54:29 AM
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Long before portable computers, the Beatles anticipated this problem of moving from the "A" side to the "B" side. They released a 45 rpm vinyl record in 1965 with "I'm Down" on one side and "Help" on the flip side!

DrQuine
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re: Computer swap on Mars rover
DrQuine   3/13/2013 1:47:20 AM
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I marvel at the ability of engineers to manage computer problems at great distances in hostile environments. I have enough trouble managing mine right in front of me when I have full physical access and the ability to substitute parts. One obvious trait that the NASA ground team has perfected is the ability to plan ahead, think about possible consequences, and craft a careful action plan. Many personal computer repairs go down some dead ends and depend upon physical access to reverse errors and restore functionality.

selinz
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re: Computer swap on Mars rover
selinz   3/6/2013 7:19:14 PM
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Redundancy is a great think if you can afford it!

resistion
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re: Computer swap on Mars rover
resistion   3/5/2013 12:15:32 PM
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It's really the SRAM soft errors that cause the run-time glitches.

ip2design
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re: Computer swap on Mars rover
ip2design   3/5/2013 9:16:46 AM
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And MRAM too.

GermanInTI
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re: Computer swap on Mars rover
GermanInTI   3/5/2013 2:09:59 AM
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Flash memory does not work well under space radiation, FRAM must be used instead

JavaLu
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re: Computer swap on Mars rover
JavaLu   3/4/2013 11:18:47 PM
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Kids now day wont get this reference



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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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