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Subject:   Could the problem be a faulty ground?
Date:   2003-07-05 21:07:00
From:   anonymous2
Response to: Re: Connecting iSight to a PC

A random friend told me that the horiztonal synch problem could be caused by a faulty ground.


The power supply has only two plugs, not three.
Could this be the cause of the flicker and/or the boriztonal bar of the top of the picture appearing in the bottom?


I don't know enough about the pins of a two-prong outlet for power. Warren, do you think I should making certain that some extra lines are grounded by hand?


Scott
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Showing messages 1 through 2 of 2.

  • Could the problem be a faulty ground?
    2004-01-02 19:10:27  anonymous2 [Reply | View]

    I have no idea about how well an iSight will perform on a PC, but the top line appearing on the bottom very well could be ground related - though it could be driver related as well. In a power connection with three leads like you see in AC power outlets, everyone knows that the two mains are alternating 120V 60Hz, and the third is a ground. In two-leads household outlets, they were polarized, rather than having a ground. Firewire doesn't resemble either of these, namely because it is DC, not AC. In DC, you have a positive and a negative. Electricity flows from the negative to the positive. However, voltage irregularities, or RFI and EMI interfernce can pollute the electrical signature enough to affect an image - but I'd say drivers were to blame if the problem was a smooth straight consistent line from the top appearing on the bottom. Otherwise, it would not follow a precise regular pattern of distortion like that.
  • Could the problem be a faulty ground?
    2004-01-02 19:10:16  anonymous2 [Reply | View]

    I have no idea about how well an iSight will perform on a PC, but the top line appearing on the bottom very well could be ground related - though it could be driver related as well. In a power connection with three leads like you see in AC power outlets, everyone knows that the two mains are alternating 120V 60Hz, and the third is a ground. In two-leads household outlets, they were polarized, rather than having a ground. Firewire doesn't resemble either of these, namely because it is DC, not AC. In DC, you have a positive and a negative. Electricity flows from the negative to the positive. However, voltage irregularities, or RFI and EMI interfernce can pollute the electrical signature enough to affect an image - but I'd say drivers were to blame if the problem was a smooth straight consistent line from the top appearing on the bottom. Otherwise, it would not follow a precise regular pattern of distortion like that.
Showing messages 1 through 2 of 2.