backup alert / reversing alarm




			Bulb		on/off Coding		Adaptive	White noise	dB
________________________________________________________________________________________________________________________

Bulb			B		(B+C)							
 -> 12v			BLT-20		BLT-20 (NS)						87
 -> 24v			BLT-20L		BLT-20L (NS)						97


on/off Coding				C  							
 -> 12-24v				BA-32(NS) 						90



Adaptive				A+C			A				
 -> 12-24v



White noise				W+C					W