Draft 1.2
								April 16, 1996
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Trigger/DAQ Summary for CLEO-III, BELLE and BaBar
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Description			CLEO-III	BELLE		BaBar
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L1 inputs			DRIII,CC	SVD,CDC,CAL,TSC	DCH,EMC
	optional				MU
 
L1 trigger latency		 2.5 us		 2.2 us		  12 us
 
Deadtime after L1 accept  	  20 us	 	 100 us		 1.5 us
	at max DAQ input rate	   2 %		   5 %		 0.3 %
 
L1 timing accuracy		 120 ns		  20 ns		1000 ns
 
Estimated L1 rate (L=3x10^33)	 260 Hz      	 200 Hz		1300 Hz
	physics			 120 Hz	      	 100 Hz		 200 Hz
	beam+cosmic background	 140 Hz      	 100 Hz		1100 Hz
 
L2 implementation		 hardware	hardware	software
	status			 option		option		option
 
DAQ input rate specification	1000 Hz		 500 Hz		2000 Hz
 
DAQ event size			  25 kB		  30 kB		  25 kB
 
L3 max output rate		 100 Hz		 500 Hz 	 100 Hz
	bkg reject fraction	0.80		0.00		0.95
 
Scheduled installation date
	Trigger			Jan 1998	Mar 1998	Jun 1998
	DAQ			Jan 1998	Mar 1998	Aug 1998
 
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