The ADLINK PCI-9816, 9826 and 9846 are four channel, 16-bit digitisers designed for sampling multiple high frequency signals simultaneously such as radar, ultrasound and vibration analysis. The analog input range can be programmed to measure very low voltages or more typical input signals. 

The PCI-9816_9826_9846 series come with a deep on-board memory, that enables recording of waveforms for extended periods of time, without worrying about the transfer speed of the PCI bus.

There is an SSI bus which allows you to synchronise several boards inside your computer