This is a high spec DV to SDI converter. It's used to convert composite, S-Video and DV to professional standard SDI/AES signal. It's on ebay at:

http://cgi.ebay.co.uk/ws/eBayISAPI.d...MESE%3AIT&rd=1

Alternatively, search ebay for Miranda DV Brideg and you'll get it 'cos it's the only one on there!