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<blockquote data-quote="Fisty McB" data-source="post: 1081920" data-attributes="member: 389824">As far as I know, there is at least one relay station that uses SATBACK as its primary DTT feed for the PSB1 &amp; 3 multiplexes that is based on the Isle of Barra on the Western Isles of Scotland, basically because the only RBL feed after digital conversion has been unreliable. PSB2 (ITV/C4/C5) is still fed by RBL but if the feed fails, then it goes until conditions return to &quot;normal&quot; again. In terms of distribution either for main or backup, cost will factor - but as a backup it is arguably now even more important because of the 700MHz clearence - the more common reuse of UHF frequency allocations increase the risks of interference at a site for either RBL (used at relays) or RBS (used at sites as a backup link) for either to be reliable. As an example, the Strabane relay station in NI has had to change its RBL twice since DSO, originally for analogue &amp; DTT it was fed via the Limavady transmitter but this was shortly changed to being fed via Brougher Mountain, while after the 700MHz clearence in September last year, its RBL feed is now due to change to the L/Derry relay which itself was originally RBL fed from Limavady but now has its own fibre feed.</blockquote>

[QUOTE="Fisty McB, post: 1081920, member: 389824"] As far as I know, there is at least one relay station that uses SATBACK as its primary DTT feed for the PSB1 & 3 multiplexes that is based on the Isle of Barra on the Western Isles of Scotland, basically because the only RBL feed after digital conversion has been unreliable. PSB2 (ITV/C4/C5) is still fed by RBL but if the feed fails, then it goes until conditions return to "normal" again. In terms of distribution either for main or backup, cost will factor - but as a backup it is arguably now even more important because of the 700MHz clearence - the more common reuse of UHF frequency allocations increase the risks of interference at a site for either RBL (used at relays) or RBS (used at sites as a backup link) for either to be reliable. As an example, the Strabane relay station in NI has had to change its RBL twice since DSO, originally for analogue & DTT it was fed via the Limavady transmitter but this was shortly changed to being fed via Brougher Mountain, while after the 700MHz clearence in September last year, its RBL feed is now due to change to the L/Derry relay which itself was originally RBL fed from Limavady but now has its own fibre feed. [/QUOTE]

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