March 22nd, 2014, 15:02
March 22nd, 2014, 15:15
March 22nd, 2014, 15:21
fzabkar wrote:ISTM that you have correctly identified the R/W differential pairs. Are you measuring 0V between each signal and ground, or 0V between each of the pairs?
March 22nd, 2014, 15:28
ddrecovery wrote:fzabkar wrote:ISTM that you have correctly identified the R/W differential pairs. Are you measuring 0V between each signal and ground, or 0V between each of the pairs?
Each the pairs......... How do I test against ground?
March 22nd, 2014, 15:33
ddrecovery wrote:ddrecovery wrote:fzabkar wrote:ISTM that you have correctly identified the R/W differential pairs. Are you measuring 0V between each signal and ground, or 0V between each of the pairs?
Each the pairs......... How do I test against ground?
Just to clarify, I am testing the channels with a multi-meter. ie one probe on one side of the read channel pair, one probe on the other side of the read channel pair.
March 22nd, 2014, 15:39
fzabkar wrote:ddrecovery wrote:ddrecovery wrote:fzabkar wrote:ISTM that you have correctly identified the R/W differential pairs. Are you measuring 0V between each signal and ground, or 0V between each of the pairs?
Each the pairs......... How do I test against ground?
Just to clarify, I am testing the channels with a multi-meter. ie one probe on one side of the read channel pair, one probe on the other side of the read channel pair.
The DC voltage between each side of the pair will always be zero. You need to measure the voltage between each side of the pair and ground.
March 22nd, 2014, 15:43
ddrecovery wrote:Sorry to be dumb, but how do I do that. Put one probe on one side of the pair and touch the computer chassis?
March 22nd, 2014, 15:45
fzabkar wrote:ddrecovery wrote:Sorry to be dumb, but how do I do that. Put one probe on one side of the pair and touch the computer chassis?
That's one way, but you could use SATA power ground or a screw hole as your ground reference.
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