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Message: <blockquote data-quote="hexah" data-source="post: 695105" data-attributes="member: 333852">When big dishes are installed on exposed roofs there are usually a few people involved as it takes some effort to haul them up say 5-12 storeys or more. The lack of shelter and the size of the dish face means interference is much more likely than at ground level. So when interference is suspected it is easy to marshall them to stand in various places around the dish while someone watches the meter. Perhaps it may be quicker if you could get a few volunteers, one to watch the signal on the TV and the others on the roof - as long as they are not clumsy or prone to vertigo!</blockquote>