The National Instruments part number 778950-01 corresponds to the PCI-6551 Digital Waveform Generator, designed for high-performance signal generation and acquisition. This module features 20 data channels and 4 Programmable Function Interface (PFI) channels, along with 3 input and 2 output clock terminals to facilitate precise timing and synchronization. For signal generation, the device utilizes its data channels for data transmission, while the DDC CLK OUT provides synchronization, and the PFI channels supply additional control signals. In terms of signal acquisition, the data channels are responsible for acquiring digital data, with the STROBE channel and PFI channels managing timing and control functions.

The PCI-6551 supports multiple clock sources, including an onboard voltage-controlled crystal oscillator with a frequency range of 48 Hz to 50 MHz, an external clock input through an SMB jack with a 20 kHz to 50 MHz range, and the STROBE signal which can also function as a clock during data acquisition. The onboard memory capacity varies based on configuration: it supports 4 MBytes at 1 Mbit/channel, increasing to 32 MBytes at 8 Mbit/channel, and up to 256 MBytes at 64 Mbit/channel.

Power consumption for the 778950-01 is typically 21.6 W, with a maximum of 27 W. It operates effectively within an ambient temperature range of 0 °C to 45 °C and a relative humidity of 10% to 90%. For storage, the module can withstand temperatures from -20 °C to 70 °C and humidity levels between 5% and 95%. This versatility makes the PCI-6551 digital waveform generator an ideal choice for demanding industrial applications requiring precision signal generation and acquisition.