Agilent HP 94120-60016 scanner relay card is installed into the Agilent HP 9412A modular switch chassis is used with a 9411a controller  which is used by a 1000 series computer to control the 9412A modular switch, 9413A vhf switch  or 9414A switch matrix . The HP 9412A modular switch can hold up to 25 assorted cards.  switching signals up to 10mhz  up to 1768 pins (34x52)

cards used are such as 94120-60016 94120-60017 94120-60018