The BBC did a complete series on the history of it motorsport coverage earlier this year
link. You might be able to find a torrent of it kicking around which would give you a lot of reference material through the ages although obviously you'll have to find the F1-specific bits.
Another change that's happened in the last decade is the change from host broadcasters to FOM taking direct control of coverage. It's a common trend in sport coverage - the IOC and FIFA do the same now I think. Here's a 2005 link that shows things in transition:
link and a bit more background and a bit of media business stuff
here.
They used to have problems with the quality of coverage varying from country to country - I remember some terrible coverage where the director just mechanically followed the leading car for lap after lap, missing all the action further down the field. So now they bring their own people. I used to work with someone whose husband had a contract as an FOM cameraman. The crew are (or maybe were, this was a couple of years back) flown out from RAF Biggin Hill in FOM chartered planes to cover the event in order to give a guarantee of quality to the feed.
You'll probably be able to find some press releases from service and equipment providers who have been involved in kitting out facilities or have won contracts to provide coverage services in different territories although a quick Google didn't really yield much. I bet if you play with some search terms I'm sure you'll find some stuff. Those kinds of companies will normally put out something to celebrate high profile partnerships.
Just realised that you didn't really specify whether you meant the technical, creative or business side of broadcasting. Do you have one area that you need to major on?
Hope that helps,
Matt.
[Edited for grammar]
