The Entertainment Services and Technology Association's technology standards program has released two more draft American national standards for public review: E1.1, Entertainment Technology--Construction and Use of Wire Rope Ladders; and E1.3, Entertainment Technology--Lighting Control Systems--0-10V Analog Control Protocol. E1.1 describes the ladders often used on rock-and-roll shows to allow access to trusses, while E1.3 specifies technical details for 0-10V analog lighting control
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