Surprised one backup wasn’t satellite especially with several hours of live programming going out each day. Use same transponder for the TLS
programs and later for ITV News.
Some excerpts from the ITV Delivery Guidelines:
Production companies providing live programming will be responsible for providing as a minimum two circuits from the remote OB location or studio to a specified ITV handover point. Those two circuits shall be designated as Main and Backup and must be separate and diverse from each other. The Main circuit should always be delivered via fibre where possible.
The route taken and connectivity provider are at the production company’s discretion but the quality and robustness of these paths should be carefully considered as they form part of the contract SLA.
The Backup circuit where possible should also be delivered via fibre, but for the sake of resilience and redundancy it is ITV policy that this circuit be completely separate and diversely routed from the Main path from the point of origin to Ericsson. Routing both circuits via any of the same infrastructure would constitute a single point of failure, which would be unacceptable to ITV. If a second, fully diverse fibre based circuit is unavailable the Backup circuit may be delivered via satellite.
For comparison, the BBC don't require a backup for daytime programmes:
OPTION A: Programmes with a major UK and International public interest
Main and Backup links are geographically and electrically separate as far as possible. Where satellite is used, there are two separately located uplink trucks, powered differently from each other.
The source should be able to continue in some form, during a break down or power loss affecting some facilities.
OPTION B: Live Primetime Programmes (e.g. Saturday early evening)
Main and Backup links and power supplies have some commonality, which creates an accepted single-point-of-failure risk. Reserve links could be lower quality or even SD. A reserve power supply should be available however it only need be capable of supplying the minimum infrastructure to keep some of the programme on air.
OPTION C: All other programmes including live links into studio programmes
A single link, with no backup is acceptable. There only need be minimal alternate power supply and mobile phones can be used as alternate comms.