Hi Jamie,
Typically a broadcaster has a spec which defines things like setup, clock, audio layout and end hold as well as requred metadata.
For example, BBC specifies 20 seconds of lineup / tone, 7 seconds of clock and 3 seconds of black before Programme, with timecode starting and 09:59:30:00 and programme at 10:00:00:00.
In your NLE export settings, there is typically an AS-11 preset where you can add metadata, things like title, audion track layout, language etc. Not all NLE's have this. AVID and Adobe Premiere are fairly simple. FCP X is a slightly different workflow. Davinci Resolve needs a plugin.
It's also worth checking the file with some sort of AQC (Automated Quality Control). QScan is now quite affordable and has templates to test AS-11.
If you can give more specific information, can try and help a bit more.
Mikey
