As printed on the card that’s quite an old one. It’s a “CAT” timecode interface for a SADIE3 system (it may work with SADiE4 too). The BNCs are video (SD)sync in and out. The 25way D type has four RS422 ports, and LTC in and out.

It would need other cards to do anything at all – the DSP audio I/O cards for a SADiE3 system. You would also need a PC with ISA slots to plug it into, and probably something between Windows 3.1 and Windows 98 or something like that. If you have matching DSP cards, and a suitable PC with ISA slots and the inclination to build it back up as the finest audio editing system of the last millennium.

SPECIFICATIONS
ISA card providing Timecode and machine control I/O
Video                            Input
Termination               Card applies 75Ω termination
Sync amplitude          Pulses should be 300mV when terminated in 75Ω
Connector                    75Ω BNC
Video Output
Source Impedance     75Ω
Connector                    75Ω BNC
Control connector      25-way D-sub male connector
Format                         4 x RS422 connections
Industry standard machine control pin-out via 9-pin break-out.

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