Carmel transmitting station

Columns: Frequency | UHF | kW | Service | System
727.25 MHz | 53 | 100 | S4C | PAL System I | 746.000 MHz | 55 | 2.5 | BBC ( Mux 1 ) | DVB-T | 759.25 MHz | 57 | 100 | BBC One Wales | PAL System I | 777.833 MHz | 59- | 5 | SDN ( Mux A ) | DVB-T | 783.25 MHz | 60 | 100 | ITV Wales ( HTV Wales until 2002 ) | PAL System I | 801.833 MHz | 62- | 2.5 | BBC ( Mux B ) | DVB-T | 807.25 MHz | 63 | 100 | BBC Two Wales | PAL System I | 825.833 MHz | 65- | 2.5 | Digital 3 & 4 ( Mux 2 ) | DVB-T | 834.000 MHz | 66 | 1 | Arqiva ( Mux C ) | DVB-T | 842.000 MHz | 67 | 1 | Arqiva ( Mux D ) | DVB-T

Example questions:
Which broadcasting frequency does this Carmel transmitting system , used by the free-to-air television channel with an average of 131 employees , have ? | What category of unit system does this unit fall under that this free-to-air Carmel television channel catering to a Welsh-speaking audience utilizes for broadcasting ? | What is this unit commonly used to describe mathematically , which the Carmel channel formerly called Harlech Television used to distinguish itself from others ? | Where was this Carmel broadcasting system , utilized by the broadcaster that maintains more than 22,000 employees in total , first used ?

Answers:
625-line / 50 field ( 25 frame ) per second | International System of Units | sine waves | Singapore