mapj1:
How practical, or not, would it be to bring a supply in via another route - not quite at the level of an extension lead out the window to next door, but back from somewhere nearer the origin. I appreciate that may not be easy, but cables through the airlock door was OK for the MIR space station, so perhaps a test with a supply brought in may be worth it.
Failing that a clean supply may be possible by filtering (example of the sort of thing I mean ) The idea is dirty in one side, clean out the other, and could be in a box beside the DB, or indeed for debugging perhaps a lead with one of these and a plug on one side and 4 way socket on the other end (and adaptable box and some skintop glands if used as a portable test thingy.).
If it is not mains borne but is ESD induced, then yes, perspex screens and unearthed metal frames seem a recipe for possible trouble with static zaps, but I'd expect both sides of the room to be equally affected unless there is some odd source of extra humidity on one side
Mike.
I'm coming in early tomorrow again, before the office starts to fill and i'm going to try unplugging each none passive lead (They seem to have one passive and one none passive due to lack of correct connections on the back of the monitors) and then i'm going to see if the problem still exists both on the scope and in reality (Monitors switching off) After that, it's time to put both rings on one phase and see what happens for the day!
mapj1:
How practical, or not, would it be to bring a supply in via another route - not quite at the level of an extension lead out the window to next door, but back from somewhere nearer the origin. I appreciate that may not be easy, but cables through the airlock door was OK for the MIR space station, so perhaps a test with a supply brought in may be worth it.
Failing that a clean supply may be possible by filtering (example of the sort of thing I mean ) The idea is dirty in one side, clean out the other, and could be in a box beside the DB, or indeed for debugging perhaps a lead with one of these and a plug on one side and 4 way socket on the other end (and adaptable box and some skintop glands if used as a portable test thingy.).
If it is not mains borne but is ESD induced, then yes, perspex screens and unearthed metal frames seem a recipe for possible trouble with static zaps, but I'd expect both sides of the room to be equally affected unless there is some odd source of extra humidity on one side
Mike.
I'm coming in early tomorrow again, before the office starts to fill and i'm going to try unplugging each none passive lead (They seem to have one passive and one none passive due to lack of correct connections on the back of the monitors) and then i'm going to see if the problem still exists both on the scope and in reality (Monitors switching off) After that, it's time to put both rings on one phase and see what happens for the day!
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