Report on Receiver Installations, New York City Uhf-TV Project

摘要

The report deals with the installation of observation receivers at 768 randomly selected locations within 25 miles of the Empire State Building. All of the television signals observed originated at this site. The data shows that on the basis of percentage of locations receiving 'Excellent' or 'Fine' (Grade 1 or 2) pictures indoors or 'Excellent', 'Fine' or 'Passable' (Grade 1, 2 or 3) pictures indoors, Channel 31 was inferior to Channels 2 and 7 by approximately 10%. This was primarily due to thermal noise caused by lower penetration of UHF signals. This difference almost disappears completely when outside antennas are employed. The simplest of antennas are usually satisfactory for the reception of either UHF or VHF. Good reception was obtained at most locations using a single antenna for both UHF and VHF. Color reception is favored neither by UHF or VHF. Ghosting differences between UHF and VHF are small enough to be disregarded. Householder's ratings are subject to question. Better shielding against IF pickup and some accomodation for coaxial transmission lines will assist the installer in providing better reception at difficult locations.