The following is a Teleview - recommendation for digital broadcast Tv reception.
KQTV is a strong signal , I recommend install a Antennas Direct DB4e UHF antenna (no amplifiers) to receive the UHF stations and the Weak KSHB-TV UHF channel 42 NBC.
The DB4e UHF antenna will receive the channel 7 signal that is very strong and act to attenuate the channel 7 signal strength.
For 1 Tv connected use no splitter.
For 2 Tv's connected use a common simple 2 way splitter.
For 3 Tv's connected use a common simple 3 way splitter.
For 4 Tv's connected use a common simple 4 way splitter.
No requirement for UVSJ's and second antennas and such.
Aim the DB4e at about 175 degree magnetic compass direction.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Here are some above the roof antenna mounts ,
http://www.ronard.com/909911.html ,
http://www.ronard.com/34424560.html ,
http://www.ronard.com/ychim.html ,
http://www.ronard.com.
Buy the ronard antenna mounts at solidsignal by typing the word ronard in the solidsignal search box.
Here are some places to by antennas and etc. ,
http://www.solidsignal.com ,
http://www.amazon.com.
As always , trees and tree leaves do a real fine job of reducing or blocking Tv reception and so do buildings and other obstructions.
It is best install the antenna at a location where there is the least amount to no amount of trees and obstructions in the directions of reception.
The Tv/s Must Channel Scan for the Digital Broadcast Tv Channels , sometimes named the 'Air Channels' or 'Antenna Channels' in the Tv setup menu because the Tv transmissions travel through the air from the transmitting antenna to the receiving antenna.
DO NOT channel scan for cable tv channels.