Just for an example, let's say that you live in Russelville Ark and you wanted to watch WARK
Callsign: KARK-TV Service: DT Community: LITTLE ROCK, AR, US
DTV Type:
Licensee: NEXSTAR BROADCASTING, INC.
Channel: 32 Offset:
Specified Channel: 32 Max HAAT: 520 m
File No.: BPCDT-19990614KE Cutoff Date: Dom. Status: CP
Facility ID: 33440 Application ID: 286175 ASRN: 1019242
Latitude: N 34° 47 ' 57 "
Longitude: W 92° 29 ' 59 "
ERP: 989 kw
HAAT: 474 m
RCAMSL: 602 m
RCAGL: 288 m
Now let's say that The average estimated signal level from WARK in your area is -41db.
That calculates to .00008 millawatts (000.000.08 watts) of power per meter of antenna receive (radiator) element size.
Not the whole antenna size.
There are three parts to a antenna.
1. Director
2. Radiator (the element/s that the wire connect to)
3. Reflector
The Directors and Reflectors are generally grounded either directly or
through a tuning wire.
With a -41db input and a receiver that can pick up a signal to -55db (most are in this range, but manufactures do not publish any specifications), you have 14db of safety factor for all atmospheric signal reduction, trees and other factors.
You should get a good picture (analog).
So what you want to do is find the best antenna for your situation with the most amount of gain and the broadest width or reception since your area might have all UHF channels from digital channel 7 - PBS - KETS to digital channel 44 - KARZ
If you did not wish to receive channel 7 and channel 13 - KEMV
You could buy a UHF only antenna such as a Channel Master CM 4228 and a good pre amplifier and be able to receive as many channels as possible on the UHF in your area, as long as your antenna was higher than the highest thing in your neighborhood and there was no buildings more than 4 stories high, trees, hills, mountains etc. in your area between your antenna and the transmitter.
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