|
Hi Charlie,
This mainly has to do with how the FCC alloted slots for television. The final VHF band was assigned between approximately 55MHz (channel 2) and 211MHz (channel 13). When UHF became necessary in 1952 it was assigned 471MHz (channel 14) to 885MHz (channel 83). You can see there was a substantial gap between channel 13 and 14. Because cable does not come under the FCC allocations, they are free to pack every channel 6MHz apart unbroken. This is why standard cable channels above 14 appear at lower frequencies than there terrestrial counter parts. You can find some good charts on the web that will give the exact frequencies of each channel for the various systems.
Darryl
|