Oxford transmitting station

Columns: Frequency | UHF | kW | Service | System
538.000 MHz | 29 | 8 | Arqiva ( Mux D ) | DVB-T | 578.000 MHz | 34 | 10 | BBC ( Mux 1 ) | DVB-T | 679.25 MHz | 47 | - | Six TV ( The Oxford Channel until 2003 ) | PAL System I | 690.000 MHz | 48 | 8 | Arqiva ( Mux C ) | DVB-T | 695.25 MHz | 49 | 40 | Channel 5 | PAL System I | 713.833 MHz | 51- | 6 | SDN ( Mux A ) | DVB-T | 721.833 MHz | 52- | 6 | BBC ( Mux B ) | DVB-T | 727.25 MHz | 53 | 500 | Channel 4 | PAL System I | 759.25 MHz | 57 | 500 | BBC One | PAL System I | 783.25 MHz | 60 | 500 | ITV1 ( Central until 2002 ) | PAL System I | 807.25 MHz | 63 | 500 | BBC Two | PAL System I | 850.000 MHz | 68 | 10 | Digital 3 & 4 ( Mux 2 ) | DVB-T

Example questions:
What does the abbreviation for the Oxford transmitting system used by the U.K. 's fifth national terrestrial analogue channel stand for ? | What year was the Oxford broadcast transmission system used by the oldest national broadcaster in the world published ? | In 2005 , what group owned the Oxford transmitting service that uses 30 more kW than the service based in Westminster , London ? | Where are the headquarters of the Oxford transmitting service that was launched 17 years before the service owned by Oxford Broadcasting until 2001 was launched ?

Answers:
Phase Alternating Line | 1997 | RTL Group | Leeds , United Kingdom