zerg901 - it could be anytime on a Friday, the Signal Division will call us in Fire Alarm and see if things are "quiet" enough to do the test. We test on Channel 1, 2, 4, then we do a "repeater knockdown" check and finish it up with the "Ememrgency Alert Tone" test , a wobble tone, and thats about it and last all of 3 minutes. Also on Friday's we switch antenna locations from Cary Hill, where Engine 7 runs out of, to the Station 1 antenna just to make sure all systems are working properly. Can never have enough back up plans !!!