The receivers all make arbitrary decisions on how much of an arc they can move the motor in USALS mode. They usually err by a number of degrees. If you can set an active tp on Hispasat on your antenna screen, you may be able to drive there in "motor control mode" , which is Diseqc 1.2 commands, and then save that position, if you find it. All receivers that I have had are conservative in their USALS arc, but the motors generally have a wider capability.