No setanta dont own any of their own OB units they awarded the contract to Arena TV ob they film all the premiership and conference games for them.
All the games are filmed using HD cameras,VT machines and HD ob units and although im not 100% on this as not done a Setanta game yet I think its sent back to them as an HD feed its just there equipment to playout isnt HD capable and they wont buy the required bandwith to broadcast it.
The Setanta contract is for at least camera production to include 2 super slo mos because this is the biggest contract Arena have got they have had the setanta logo put on them. But the ob units in fact are used regular by Sky for the Greyhounds and the Darts and were used for the Diana concert and live Earth both full HD productions
If you want any further info look at
www.arena-tv.com