I think you have two sweep modes, auto and manual, and yes you can move the wheel around. Good luck seeing the blip on the screen - it seems small and real intermittent. If you blink you'll miss it, its that fast. It's a pretty tight beam. Better to watch the numeric readout since its easier to see. Unless of course you can keep the target within the 10 - 15 degree beam which I've found to be pretty hard.
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