polaroid range finder interference help we have a setup with with polaroid transducers and rangefinders we would like to fire these three at a time with about ms between firings the three that are being fired do not fire in the same direction to further explain the situation assume we are firing sonars a b c ms apart each other we should normally see an echo on a that corresponds to the distance however sonar a detects the init line of sonar b the detection is actually through the transducer of sonar a we can see a very faint khz signal on the transducer exactly at the time the init line of sonar b is activated we feel that there is some ground coupling that is causing this interference we came to this conclusion since we are using a separate power supply for sonars b and c has anyone else had any problems with these particular units and this type of experience your suggestions for remedies will be greatly appreciated caglan m aras aras eceris ece ncsu edu ece department ph north carolina state university fx raleigh nc
