Wait so one of the BBC studios transmitters was fed by an off air signal provided by a third party?
What third party?
The BBC uplink their own DSat services - not Sky - even though those services are available to Sky viewers on Sky boxes.
The Sky receiver (which can be purchased commercially, similarly to any other IRD) was simply receiving a consumer signal that had been uplinked by the BBC. It wasn't receiving a Sky uplinked-signal.
The BBC uplinked-services are compatible with both Sky boxes and Freesat boxes, and contain EPG
data etc. compatible with both platforms. Even in the early days of DSat, when the BBC were FTV-encrypted, and on Sky's platform only, the BBC arranged their own uplink (usually using BBC equipment, though some services may have come from an Arqiva uplink?) with Sky encryption equipment on BBC premises.
(Of course it's also worth pointing out that all transmitters in the UK are operated by a 'third party' - Arqiva. Neither the BBC, nor ITV/C4 operate their own OTA DVB-T/T2 transmitters.)
(Also not sure what you mean by 'BBC studios transmitters'? The transmitters in question are the main BBC One transmitters used in the East of England. Studios here don't really have transmitters.)
I was going by this post:
That's right ...the "network feed" was Norwich output via microwaves to Sandy Heath,
There was a microwave feed to Hills road which either took that or a feed from the ENG dish which could take Northampton etc .
There then was a different microwave which took the Cambridge output back to Sandy Heath ..
This carried a signal in Teletext to do the opt switch at the transmitter and to select if Norwich or ENG was fed to Hill road .
The Ceefax and datacast etc was bridged from the incoming feed from Norwich to the feed to the transmitter down stream from the opt switch actually all of this was in the SIS domain .
When the BBC moved to Cambridge Business Park Cowley road ..... there was a feed of pure (digital) network there ... so the opt switch was replaced by a Sky DSAT receiver and Ceefax etc bridged in down stream of that ( and a NICAM modulator added )
The picture quality improved very noticeably ..... and there was no hard switch /opt
Northampton and Luton feeds were video over Ip codecs, ENG went satellite ..
The BBC saved a fortune in the cost of microwave links and the near impossibility of moving them
And Siemens who architected this ( based on analogue tv in Channel Islands ) got little recognition ...
Also the change over was easy ... as DSAT (and DTT
) was via Central code and mux , it was just buddyed over the change over weekend .... no need to move "analogue"
I was going by the opt switch being replaced by Sky DSAT receiver.
Don’t let anyone treat you like you’re a VO/SOT when you’re a PKG.