Bloody typical... I probulate the HP 5245L in an effort to establish the extent of repairs needed (three low frequency display modules, shotgun PSU recap), and realise I don't have a sig-gen with a high enough frequency output to test the plug-in (300MHz-3GHz, my sig-gen goes to 25MHz) so now I need to find a faster one!
When I find the rabbits that keep digging these damn holes, I'm gonna make me a pie...