Originally Posted by bobby94928
It really has little to do with Counties. It has much more to do with how an antenna signal reaches your location. You'd be hard pressed to get SF in Fairfield OTA while you can easily get Sac.... That's how DMAs are established.
That's not entirely correct; it's ALL in how Nielsen "decides" which areas (ie: counties, or portions thereof) belong to which TV market. In some cases, it has very little to do with how OTA signals reach a certain area; it's all in which DMA/stations are most heavily watched in an area...however the signals are received.
Again, look at my example of the Palm Springs DMA; does it really make sense that LA stations are going to be received better EAST of the Palm Springs DMA, than the Palm Springs stations themselves?
I can easily show you examples in IL, of (entire) "large" counties that Nielsen deems to be in a given DMA; the reality being that there is no way you can get those said DMA stations with an (outside) antenna in the outer fringes of these DMA's...while you CAN easily receive OTA stations from the adjacent DMA in these same outer areas.
Also, the fact that Nielsen does do periodic "adjustments" to their DMA maps, exemplifies this. Do you think that OTA TV station's signals in an entire DMA, all of a sudden changed who/how should be in a DMA?
The satellite companies have had to deal with this from the beginning. Cable is now catching up.
Again, the rules for satellite have (& still are to a point) different from cable, in which OTA stations are carried in a given area...Edited by dishrich - 10/16/13 at 8:22am