Photron Fastcam Viewer (PFV) is a plug-in that provides synchronization of Photron's high-speed cameras with the NI USB-6251 BNC data acquisition module from National Instruments. The data acquisition module provides eight differential analog channels (16 single ended) with an aggregate one million samples-per-second, single-channel data rate. The optional plug-in is controlled via Photron's PFV camera control software, and enables simultaneous recording and playback of analog data that is very precisely synchronized with high speed video sequences recorded with Photron cameras at frame rates from 60 to 1.5 million frames per second (fps).