Rick, Might the filtering of the 60Hz out of the power supplies be poor and worse as the CRTs warm up? Remember, they're cold when you move them elsewhere for a test.
Alternatively, might the 60Hz fluorescent lighting falling on these monitors interact differently with the screen refreshing than on other monitors in such a way as to cause visual effects? Just thoughts. Look for the simple solutions before you blame the Martians. Dick Shultz On 6/1/99 12:09 PM [email protected] <[email protected]> said > >I have in my company, several people asking for help with swimming in their >monitors. There systems are connected to a half wall (windows on top, power >and heat on the bottom). The head is steam radiation via baseboard >radiators. These monitors are NOT next to any known magnetic fields. I have >verified that if the monitors are physically moved away from the wall/heater >the noise diminishes. In the row of multiple cubicles only selective people >have the problem (perhaps 3 out of 15 or so). The noise appears to be 60 Hz >in nature although no color purity problems were noted. > >I'm assuming that I am now looking for magnetic fields, possibly from the >electrical feed line, or could it be the radiators? Is it possible for these >to be nodal or selective along a common wall? > >Has anyone else had similar problems? Would it make sense to obtain a meter >to measure the magnetics? Any suggestions appreciated. > > >Rick Busche >Evans & Sutherland >[email protected] > >--------- >This message is coming from the emc-pstc discussion list. >To cancel your subscription, send mail to [email protected] >with the single line: "unsubscribe emc-pstc" (without the >quotes). For help, send mail to [email protected], >[email protected], [email protected], or >[email protected] (the list administrators). > --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
