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<blockquote data-quote="Gabe Nahshon" data-source="post: 80028" data-attributes="member: 1242">Re: Hey digital console users don&#039;t forget your UPSYears ago, I had the unpleasant experience of watching a crowd of about 50K (while a major international touring act was on stage) breathe a collective sigh of dissapointment as a festival sound system got very quiet, all because of improper use of a UPS.&nbsp; The touring FOH console (Avid) had both power supplies of it&#039;s FOH rack on a UPS which, because the festival promoter supplied a non-crystal sync generator, switched to battery power during the set.&nbsp; These types of generators do not necessarily maintain a perfect 60 hz wave, and many UPS units do not like that.&nbsp; The UPS decided to switch to battery power, which of course nobody noticed as the little beeping piezo and blinky light was not loud enough to overcome 100 boxes of PA and a massive moving light rig.Ever since that day, our policy is this: consoles with 1 power supplies run off regular shore/generator power.&nbsp; Consoles with 2 power supplies have 1 PS running off shore/generator power and the other off a UPS.</blockquote>

[QUOTE="Gabe Nahshon, post: 80028, member: 1242"] Re: Hey digital console users don't forget your UPS Years ago, I had the unpleasant experience of watching a crowd of about 50K (while a major international touring act was on stage) breathe a collective sigh of dissapointment as a festival sound system got very quiet, all because of improper use of a UPS. The touring FOH console (Avid) had both power supplies of it's FOH rack on a UPS which, because the festival promoter supplied a non-crystal sync generator, switched to battery power during the set. These types of generators do not necessarily maintain a perfect 60 hz wave, and many UPS units do not like that. The UPS decided to switch to battery power, which of course nobody noticed as the little beeping piezo and blinky light was not loud enough to overcome 100 boxes of PA and a massive moving light rig. Ever since that day, our policy is this: consoles with 1 power supplies run off regular shore/generator power. Consoles with 2 power supplies have 1 PS running off shore/generator power and the other off a UPS. [/QUOTE]

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