Anonymouse said:
Why does the FCC have so many rules about feeding translators off-air? I would just think that relaying the audio of the main station would be enough.
Because they don't want commercial stations to build networks of translators far from the originating station.
The rules really aren't that confusing. Chuck, DG and I have mentioned that "fill-in" translators may be fed by any means excluding satellite. A "fill-in" translator has its entire signal contour within the service contour of the main station. FM translators that relay AM stations may be fed by any means, too, and are restricted to 25 miles from the transmitter and within the 2 mV/m contour.
Non-fill in translators at and above 92.1 must pick up the signal it relays over-the-air unless it gets a waiver. The FCC doesn't usually grant waivers unless the area the translator serves is unserved. There are a few of these in Alaska, New Mexico, Arizona, Utah and Nevada, but they're slowly disappearing as more stations get dropped in and more stations upgrade their coverage. I believe those translators operating under a waiver can be grandfathered in for at least some time.
Both fill-in and non-fill in translators below 92.1 may be fed by any means so long as they are owned by the licensee of the primary station, which is required to be non-commercial.