Was looking at some of the summary info. for the Philly digital stations on the FCC website and ran across the "Relative Field Polar Plots" for several individual stations. I'm assuming that these show broadcast field strength as a function of distance and direction from the transmitter.....correct me if I'm wrong.
Attahed is the plot for WPHL-DT WB Philly. Several questions about this plot....
1. Labels on this plot are pretty scarce. The rings as you travel outward from the center represent distance...is that right? how are we supposed to know what the scale is? (ie. 10 miles per ring?)
2. I'm assuming the values in blue are signal strength of some type. what do these values represent? what would be their label?
3. Why is there not one of these plots for every station listed on the FCC website. There are no plots for KYW-CBS or WPVI-ABC in philly!!! Does someone actually go out and take measuremtns to create this plot, or is it projected/theoretical??
thanks in advance

Attahed is the plot for WPHL-DT WB Philly. Several questions about this plot....
1. Labels on this plot are pretty scarce. The rings as you travel outward from the center represent distance...is that right? how are we supposed to know what the scale is? (ie. 10 miles per ring?)
2. I'm assuming the values in blue are signal strength of some type. what do these values represent? what would be their label?
3. Why is there not one of these plots for every station listed on the FCC website. There are no plots for KYW-CBS or WPVI-ABC in philly!!! Does someone actually go out and take measuremtns to create this plot, or is it projected/theoretical??
thanks in advance
