Signatec PDAC4000-T-X 4000 MSPS Waveform Generator ? 4 16-bit DAC 1000 MSPS Outputs ? 512 MB DDR RAM ? Modular Plug-in for PMP1000 Base Board ? Easy Interface DSP Functionality ? Wide Selection of Output Filters ? Digital Quad Modulator? PDAC4000 w L.P. Transitional filters