Someone already mentioned an antenna rotor and I also suggest getting that if you are getting an outdoor antenna or have an existing outdoor antenna. Digital signals are highly directional, so pointing the antenna precisely toward the broadcast towers is very important for receiving the signal. Since digital is basically all or nothing, if you are off by just a few degrees, you can lose the signal entirely. The amplifier helps pull in the signal, but proper pointing of the antenna is also important for reception. Where I live I can pick up 50+ stations, but not all at the same time unless I rotate the antenna.
Hum, I’ll try to remember this when purchasing antenna. Thanks.