Expensive sonar

[TJones]

I am running an hdi 50/ 200 transducer on a hds head unit . There is nothing wrong with my unit , because my friend has same exact setup and we are seeing the same picture . When we are looking at down imaging ,the picture is very poor , almost barely visable . Changing settings has very little effect . The thing that baffles me , is that another user was running an elite hdi and his down imaging picture was excellent . A split image of his traditional sonar . All setups are installed on hobies with transducers in water. The later setup was using an 83/200 which still does not explain the variance . Any opions ? I have not called lowrance just yet .