Originally Posted by Ddubya
Any UHF/VHF TV antenna will pick up HD but pointing the antenna is much more critical than with the old analog. With analog a weak signal would still be displayed. With the new ATSC digital transmission the carrier is the same but the digital signal that rides on it requires a certain signal level to be detected by the receiver to be displayed. If the signal is weak unlike analog you will not get a picture. If your TV has a turning meter it is much easier to adjust the antenna for maximum signal. Receiving several stations without rotating the antenna is much more difficult unless the transmitting locations are very close together.
Antenna Web will not only tell you what heading to point; but actually a ground reference to use to visually aim the antenna.
For folks who have never needed to learn, the Sensar style antennas are pointed like an airplane flying to the transmission tower you want to watch. The white box/leading UHF elements is the cockpit and the VHF "Batwings" are the wings of the plane. For the "Steerable" Jack, the arrow flies to the tower.
If you have a Sensar 3 or earlier, you SHOULD buy the Wingman upgrade if you have room to mount it without hitting something when you retract the antenna. Those leading elements act like a magnifying lens to focus weaker UHF signals onto the "omnidirectional" UHF antenna in the amp box.
Like a magnifying lens, it only works when it is pointed at the tower; just like a light magnifying lens only works when pointed at the sun.
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