I would set up and give a couple cow calls and wait...
If the wind is right, you need to just be patient.
He heard you.
give it some time to paint a
believable picture.
make sure your set up is good, he will have to be in range to see you, you have shooting lanes, you are in
front of bushes instead of behind them,...
Then start your sequence to call him.
I find that satellites will be near a herd, so if you see the "lone" bull, then give a few cow calls, maybe rub a tree, or a little squeal...
If there is a herd bull in the area, you will probably find out soon enough.
But any bull will come check you out if nothing has gone wrong yet..
Lots of times bulls run in and take a quick look and run back (I hate that!) or will sneak in.
But usually if you are in tight, and have not chased them away by now, its show time!
Also, just because you were spotted by one, don't quit until you are absolutely sure that every elk has left the area

Remember, in September it is about the cows.
Locate with bull talk, but unless a bull is actively talking to other bulls (challenge bugle), then you work the bull through his little brain.