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???
03/02/04 00:55
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#65798 - RE: vga signals isolation problem ( I th
Responding to: ???'s previous message
Large motors, not properly earthed... this explains a few things.

If you can arrange to have the monitors earthed and powered from the computer source, this could help a lot. (It also might not, depending on the compromises you have to make to meet code.) I know it's not hard to run long signal cables legally, but not so easy for power.

In the US, TranZorbs are less than a dollar; good luck in Jordan!

Another thing that would help a lot is a common mode choke. Problem is, you need to pass almost 100 MHz analog video, without distortion, while canceling enormous spikes. If you can get a big piece of ferrite (such as from a switching regulator's transformer), wind as many turns of the VGA line through as will fit.

List of 38 messages in thread
TopicAuthorDate
vga signals isolation problem ( I think)            01/01/70 00:00      
   RE: vga signals isolation problem ( I th            01/01/70 00:00      
      RE: vga signals isolation problem ( I th            01/01/70 00:00      
         RE: vga signals isolation problem ( I th            01/01/70 00:00      
            RE: vga signals isolation problem ( I th            01/01/70 00:00      
            RE: vga signals isolation problem ( I th            01/01/70 00:00      
   RE: vga signals isolation problem ( I th            01/01/70 00:00      
      RE: vga signals isolation problem ( I th            01/01/70 00:00      
         Capacitance - not cable length!            01/01/70 00:00      
            RE: Capacitance - not cable length!            01/01/70 00:00      
               RE: Capacitance - not cable length!            01/01/70 00:00      
               VGA Video            01/01/70 00:00      
      RE: vga signals isolation problem ( I th            01/01/70 00:00      
         RE: vga signals isolation problem ( I th            01/01/70 00:00      
            RE: vga signals isolation problem ( I th            01/01/70 00:00      
   RE: vga signals isolation problem ( I think)            01/01/70 00:00      
   Cable capacitance is not an issue!            01/01/70 00:00      
      RE: Cable capacitance is not an issue!            01/01/70 00:00      
         RE: Cable capacitance is not an issue!            01/01/70 00:00      
            RE: Cable capacitance is not an issue!            01/01/70 00:00      
               RE: Cable capacitance is not an issue!            01/01/70 00:00      
                  RE: Cable capacitance is not an issue!            01/01/70 00:00      
                     RE: Cable capacitance is not an issue!            01/01/70 00:00      
                        RE: Cable capacitance is not an issue!            01/01/70 00:00      
   RE: vga signals isolation problem ( I think)            01/01/70 00:00      
      RE: vga signals isolation problem ( I think)            01/01/70 00:00      
         RE: vga signals isolation problem ( I th            01/01/70 00:00      
         That is not caused by a normal ESD!            01/01/70 00:00      
            RE: That is not caused by a normal ESD!            01/01/70 00:00      
            RE: That is not caused by a normal ESD!            01/01/70 00:00      
               RE: That is not caused by a normal ESD!            01/01/70 00:00      
               RE: That is not caused by a normal ESD!            01/01/70 00:00      
   RE: vga signals isolation problem ( I th            01/01/70 00:00      
      Bowling alleys            01/01/70 00:00      
      RE: vga signals isolation problem ( I th            01/01/70 00:00      
         RE: vga signals isolation problem ( I th            01/01/70 00:00      
         Go bowling, Michael            01/01/70 00:00      
            RE: Go bowling, Michael            01/01/70 00:00      

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