he signal-to-noise ratio (SNR).
The bottom line is the link margin - the difference between the actual SNR and the minimum required for the particular modulation type and information being sent. A positive link margin indicates a working link; a negative margin indicates that the link is not working.
These are Excel spreadsheet files; they can also be read by Open Office and Neo Office, among other 3rd party spreadsheet programs.
In my opinion, the single best such site and the one to check out first is Moon Base Clavius, organized by Jay Windley. Another is by Phil Plait, the self-described Bad Astronomer; he was spurred to action by the appalling Fox TV "documentary" Conspiracy Theory: Did We Land On The Moon?.
Youtube has a 9-part video of a 2007 talk by Peter Barrett of the Canberra (Australia) Skeptics titled Why The Moon Hoax Makes No Sense. He also has an excellent list of questions to test conspiracy theories that apply quite generally, not just to the Apollo hoax conspiracy theory.
 We saw the HBers curious "logic" in action with a recent news story that a "moon rock" given to a Dutch museum by a former Dutch government official was actually a piece of petrified wood. Some HBs claimed, apparently seriously, this proved Apollo wasn't real. Of course, it only proves that this particular "rock" wasn't genuine; NASA still has hundreds of kg of real moon rocks brought back by Apollo, and countless scientists around the world have studied them. NASA's role is scientific research and science education, not supplying a collectibles market, so they do not give them away as trophies. But many individual collectors would certainly like to own a moon rock. Because they are not generally available, some have gone as far as stealing them from laboratories. It is not at all implausible that an especially dishonest individual might steal a real moon rock and replace it with a fake, or simply sell a fake moon rock to a collector with more dollars than sense. Obviously there wouldn't even be a demand for them if no one thought the genuine articles existed on earth. In any event, anyone can go to a museum with a moon rock on display and assure him or herself that it is not petrified wood.