Moel-y-Parc transmitting station

Columns: Frequency | UHF | kW | Service | System
546.000 MHz | 30 | 0.25 | Arqiva ( Mux C ) | DVB-T | 578.000 MHz | 34 | 0.25 | Arqiva ( Mux D ) | DVB-T | 639.25 MHz | 42 | 100 | S4C | PAL System I | 663.25 MHz | 45 | 100 | BBC Two Wales | PAL System I | 695.25 MHz | 49 | 100 | ITV1 Wales ( HTV Wales until 2002 ) | PAL System I | 719.25 MHz | 52 | 100 | BBC One Wales | PAL System I | 738.000 MHz | 54 | 1 | BBC ( Mux 1 ) | DVB-T | 770.000 MHz | 58 | 1 | Digital 3 & 4 ( Mux 2 ) | DVB-T | 794.000 MHz | 61 | 1 | SDN ( Mux A ) | DVB-T | 818.000 MHz | 64 | 1 | BBC ( Mux B ) | DVB-T

Example questions:
The Moel-y-Parc station service with a UHF of 30 has what as its main asset ? | Out of the services with 100 kW at the Moel-y-Parc station , one is a Welsh variation of which channel ? | The Moel-y-Parc station service with the PAL system has its name derived from a Welsh term for what ? | The Moel-y-Parc station with a UHF of 54 gets one-quarter of its revenue from which one of its subsidiaries ?

Answers:
radio and television transmission sites | BBC One Wales | Channel Four Wales | BBC Studios