Complex sentence: This was due to its relatively close proximity to WJAR in Providence, Rhode Island: the FCC had concerns that WTEN's signal might interfere with WJAR, and held the station to a 170 mile separation requirement to protect WJAR.
Split into simpler sentences: This was due to its relatively close proximity to WJAR in Providence, Rhode Island. The Federal Communications Commission (FCC) had concerns that WTEN's signal might interfere with WJAR and held this station to a 170 mile separation requirement to protect WJAR.