Well first. Depending on where you are parked the answer may well be "You don't"
Assuming a winegard Sensar III crank it up. Now there is either a box with many buttons or a "Switch plate" The switch plate has a switch. An LED a 12 volt outlet and an antenna connection.. The light must be ON
On the Box of many buttons (BOMB) or Matrix Switch make sure the power light is on and select ANT for all devices.
Next the TV.. It may have a menu option for ANT-Cable. Again ANT.
And then scan.
rotate antenna about 1/4 turn and re-scan (Take nowes on each scan)
DO this again and again. Pick direction with best results then rotate to peak liek the #2 or #3 station strength wise
Upgrades:
I added teh WINGMAN to my Sensar III and later (after an oopsie) upgraded to a Sensar IV (turned out to be a genuine upgrade)
I also replaced that wall plalt (well in my case added it) with a Sensar PRO which makes the entire Scan and peak bit way way easier.
But there are still place where it just don't work
Possible issues
Been in one RV where there was indeed a wall plate.. but no antenna cables connected to it. Not a one. Prior owner had ripped 'em out
Had mine fail once. At the roof line (in my case IN the roof) is a connection. IT was rusted shot. two new cable ends and a new double female (Barrel) connector and re-seal it up good as new
And the Oopsie I mentioned that ripped it off the RV (ouch) One new cable end and a new head later it was better than new.
OH and of course you need a Modern TV that accepts ATSC not an older analog job
I have a pair of older DVR's they work on Cable and ANALOG ota but not with the modern Digital stuff. So they think they are recording satellite.. In fact the one I'm listening to as I type thinks it is recording Dish Network (DTV Pal by Dish Network uses genuine DISH remote codes) the one in the bedroom has a Zenith/ LG / Insigina adapter and uses different codes.
THe two DVR's are chatty as well (Record on one play back on either or download and carry with you)
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times