What is the best way to setup the Tejon so that you can figure out if your target is below a certain depth? I know that discrimination typically subtracts depth, so there has to be some way to setup the two discriminators so that using both to establish and then check a target, you can get an idea if its below a certain depth (established on my machine after running a couple of tests). Is this possible? If not, is there a way to set it up so you can hear the difference and tell if its deep?