Atari orange test fixture

Ok: I'm in the process of acquiring that orange Atari test fixture that was just on eBay, and I'm wondering who has any documentation on this? Or even the correct name? John Robertson - I know you have one of these, and I know it's strictly for raster games, but what else can I do with it? Am I correct in assuming it is basically a test rig? Here's a link to the auction: (http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=205478827) tom